cdesktopenv/cde/doc/C/guides/sysAdminGuide/ch05.sgm

<!-- $XConsortium: ch05.sgm /main/10 1996/09/08 19:32:55 rws $ -->
<!-- (c) Copyright 1995 Digital Equipment Corporation. -->
<!-- (c) Copyright 1995 Hewlett-Packard Company. -->
<!-- (c) Copyright 1995 International Business Machines Corp. -->
<!-- (c) Copyright 1995 Sun Microsystems, Inc. -->
<!-- (c) Copyright 1995 Novell, Inc. -->
<!-- (c) Copyright 1995 FUJITSU LIMITED. -->
<!-- (c) Copyright 1995 Hitachi. -->
<Chapter Id="SAG.ClSrv.div.1">
<Title Id="SAG.ClSrv.mkr.1">Configuring the Desktop in a Network</Title>
<Para>The desktop is designed to work well in a highly networked environment. The
architecture of the desktop lets system administrators distribute computing
resources throughout the network, including:<IndexTerm><Primary>networking</Primary><Secondary>See also servers</Secondary></IndexTerm>
</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Applications.</Para>
</ListItem>
<ListItem>
<Para>Data files for applications.</Para>
</ListItem>
<ListItem>
<Para>Desktop session services (desktop applications such as Login Manager and
File Manager).</Para>
</ListItem>
<ListItem>
<Para>Help services. Help data files can be put on a central help server.</Para>
<InformalTable Id="SAG.ClSrv.itbl.1" Frame="All">
<TGroup Cols="1">
<ColSpec Colname="1" Colwidth="4.0 in">
<TBody>
<Row Rowsep="1">
<Entry><Para><!--Original XRef content: 'Overview of Desktop Networking86'--><XRef Role="JumpText" Linkend="SAG.ClSrv.div.2"></Para></Entry>
</Row>
<Row Rowsep="1">
<Entry><Para><!--Original XRef content: 'General Steps for Configuring Desktop Networking90'--><XRef Role="JumpText" Linkend="SAG.ClSrv.div.7"></Para></Entry>
</Row>
<Row Rowsep="1">
<Entry><Para><!--Original XRef content: 'Configuring Base Operating System Networking for the Desktop90'--><XRef Role="JumpText" Linkend="SAG.ClSrv.div.8"></Para></Entry>
</Row>
<Row Rowsep="1">
<Entry><Para><!--Original XRef content: 'Configuring Desktop Clients and Servers93'--><XRef Role="JumpText" Linkend="SAG.ClSrv.div.18"></Para></Entry>
</Row>
<Row Rowsep="1">
<Entry><Para><!--Original XRef content: 'Administering Application Services99'--><XRef Role="JumpText" Linkend="SAG.ClSrv.div.32"></Para></Entry>
</Row>
</TBody>
</TGroup>
</InformalTable>
</ListItem>
</ItemizedList>
<Sect1 Id="SAG.ClSrv.div.2">
<Title Id="SAG.ClSrv.mkr.2">Overview of Desktop Networking<IndexTerm><Primary>networking</Primary><Secondary>overview</Secondary></IndexTerm><IndexTerm><Primary>client-server configuration, See networking</Primary></IndexTerm></Title>
<Para>The operating system provides a variety of networking services, including
distributed file systems and remote execution. X servers provide additional
networking capabilities, including access to remote displays and security
services.</Para>
<Para>The desktop layers a user interface on top of these networking features. The
goals of this interface and its underlying architecture are to make networked
systems:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Easier to use. Users can run applications and access data files without
worrying about where in the network the applications and data are located.</Para>
</ListItem>
<ListItem>
<Para>Easier to administer. The desktop provides application integration tools and
networked search paths that make it easier for systems to locate remote data
and applications. In addition the desktop's file-name mapping process
makes it easier to administer complex networks containing numerous
servers.</Para>
</ListItem>
<ListItem>
<Para>Flexible. While the administration features of the desktop have been
designed for certain common network situations, the desktop can
accommodate many other customized network configurations.</Para>
</ListItem>
</ItemizedList>
<Sect2 Id="SAG.ClSrv.div.3">
<Title>Types of Networked Desktop Services<IndexTerm><Primary>networking</Primary><Secondary>types of services</Secondary></IndexTerm></Title>
<Para>Networking lets a user sitting at a particular display access various computing
services distributed among other systems, such as:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The desktop session and its applications&mdash;for example, Workspace Manager
and File Manager</Para>
</ListItem>
<ListItem>
<Para>Other applications</Para>
</ListItem>
<ListItem>
<Para>Data files</Para>
</ListItem>
</ItemizedList>
<Para>Networking terminology uses the term<IndexTerm>
<Primary>servers</Primary>
<Secondary>definition</Secondary>
</IndexTerm>
<Symbol Role="Variable">server</Symbol> to describe a system that
provides computing services to one or more other systems. When a system
receives services from a server, it is called a<IndexTerm>
<Primary>clients</Primary>
<Secondary>definition</Secondary>
</IndexTerm>
<Symbol Role="Variable">client</Symbol> of that server.</Para>
<Para>In a complex network, a system may use services located on a number of
systems throughout the network. Furthermore, a system may act as a
particular type of server (for example, a session server) and may also be a
client (for example, of an application server).</Para>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.4">
<Title>Typical Network Situations</Title>
<Para>From a desktop perspective, a typical network configuration may contain some
combination of these major components:</Para>
<InformalTable>
<TGroup Cols="2" colsep="0" rowsep="0">
<colspec colwidth="148*">
<colspec colwidth="380*">
<TBody>
<Row>
<Entry><Para>Displays</Para></Entry>
<Entry><Para>Where the X server is running</Para></Entry>
</Row>
<Row>
<Entry><Para>Login/Session servers<IndexTerm><Primary>session</Primary><Secondary>servers</Secondary><Tertiary>login</Tertiary></IndexTerm>
</Para></Entry>
<Entry><Para>Where the desktop applications (Login Manager,
Workspace Manager, etc.) run</Para></Entry>
</Row>
<Row>
<Entry><Para>Application servers<IndexTerm><Primary>servers</Primary><Secondary>application</Secondary></IndexTerm><IndexTerm><Primary>application servers</Primary><Secondary>definition</Secondary></IndexTerm>
</Para></Entry>
<Entry><Para>Where other applications run</Para></Entry>
</Row>
<Row>
<Entry><Para>File servers<IndexTerm><Primary>servers</Primary><Secondary>file</Secondary></IndexTerm><IndexTerm><Primary>file servers</Primary></IndexTerm>
</Para></Entry>
<Entry><Para>Where data used by applications is located</Para></Entry>
</Row>
</TBody>
</TGroup>
</InformalTable>
<Para>One of the most common network configurations involves systems accessing
an application server.
<!--Original XRef content: 'Figure&numsp;5&hyphen;1'--><XRef Role="CodeOrFigureOrTable" Linkend="SAG.ClSrv.mkr.1"> illustrates a workstation that uses an
application server. The X server and desktop session are running on the
workstation.</Para>
<Figure>
<Title Id="SAG.ClSrv.mkr.3">Application servers provide services to the desktop session</Title>
<Graphic Entityref="SAG.ClSrv.fig.1" Id="SAG.ClSrv.grph.1"></Graphic>
</Figure>
<Para>Networks also frequently use<IndexTerm>
<Primary>file servers</Primary>
</IndexTerm>
file servers to store large amounts of data. This
data may be used by applications running on an application server, or by the
desktop applications (for example, File Manager needs access to data files to
display them in the File Manager window).</Para>
<Figure>
<Title>Files servers provide data to application servers and session servers</Title>
<Graphic Entityref="SAG.ClSrv.fig.2" Id="SAG.ClSrv.grph.2"></Graphic>
</Figure>
<Para><IndexTerm>
<Primary>X terminals</Primary>
<Secondary>obtaining session services</Secondary>
</IndexTerm>X terminals run the X server and obtain desktop session services from another
system.</Para>
<Figure>
<Title>X terminals get session services from a session server</Title>
<Graphic Entityref="SAG.ClSrv.fig.3" Id="SAG.ClSrv.grph.3"></Graphic>
</Figure>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.5">
<Title>Other Networking Situations</Title>
<Para>The desktop is flexible and can support more complex network configurations.
This usually involves making various services, in addition to file servers,
available to application servers.</Para>
<Figure>
<Title>Services required by a desktop application server can be distributed</Title>
<Graphic Entityref="SAG.ClSrv.fig.4" Id="SAG.ClSrv.grph.4"></Graphic>
</Figure>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.6">
<Title Id="SAG.ClSrv.mkr.4">Summary&mdash;Types of Servers<IndexTerm><Primary>servers</Primary><Secondary>types</Secondary></IndexTerm></Title>
<InformalTable>
<TGroup Cols="2" colsep="0" rowsep="0">
<colspec colwidth="1.74in">
<colspec colwidth="4.19in">
<TBody>
<Row>
<Entry><Para>Display</Para></Entry>
<Entry><Para>The system running the X server.</Para></Entry>
</Row>
<Row>
<Entry><Para>Login and session server</Para></Entry>
<Entry><Para>The system running the desktop session (Login
Manager, Session Manager, Window Manager, File
Manager, etc.)</Para></Entry>
</Row>
<Row>
<Entry><Para>Application server</Para></Entry>
<Entry><Para>A system on which an application runs. Also called
the <Emphasis>execution host</Emphasis>.</Para></Entry>
</Row>
<Row>
<Entry><Para>File server</Para></Entry>
<Entry><Para>A system on which data files for applications are
stored</Para></Entry>
</Row>
<Row>
<Entry><Para>Help server<IndexTerm><Primary>servers</Primary><Secondary>help</Secondary></IndexTerm><IndexTerm><Primary>help servers</Primary></IndexTerm>
</Para></Entry>
<Entry><Para>A system on which help data files are stored</Para></Entry>
</Row>
<Row>
<Entry><Para>(Action) database server<IndexTerm><Primary>action servers, See database servers</Primary></IndexTerm><IndexTerm><Primary>database servers</Primary></IndexTerm>
</Para></Entry>
<Entry><Para>A system where files containing action and data
type definitions are stored</Para></Entry>
</Row>
<Row>
<Entry><Para>Icon server<IndexTerm><Primary>servers</Primary><Secondary>icon</Secondary></IndexTerm><IndexTerm><Primary>icon servers</Primary></IndexTerm>
</Para></Entry>
<Entry><Para>A system on which icon files are stored</Para></Entry>
</Row>
</TBody>
</TGroup>
</InformalTable>
<Para>The network may include additional servers, such as a password server, mail
server, video server, etc.</Para>
</Sect2>
</Sect1>
<Sect1 Id="SAG.ClSrv.div.7">
<Title Id="SAG.ClSrv.mkr.5">General Steps for Configuring Desktop Networking<IndexTerm><Primary>networking</Primary><Secondary>general configuration steps</Secondary></IndexTerm></Title>
<Para>There are three general steps for configuring desktop networking:</Para>
<OrderedList>
<ListItem>
<Para>Configure base operating system network services.</Para>
<Para>These are the networking services provided by your operating system upon
which the desktop depends. See
<!--Original XRef content: '&xd2;Configuring Base Operating System
Networking for the Desktop&xd3; on page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.8">.</Para>
</ListItem>
<ListItem>
<Para>Install and configure desktop networking software and services.</Para>
<Para>These are the services required by the desktop, regardless of the type of
client or server system being set up. See
<!--Original XRef content: '&xd2;Configuring Desktop Clients and
Servers&xd3; on page&numsp;93'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.18">.</Para>
</ListItem>
<ListItem>
<Para>Configure the particular type of server or client.</Para>
<Para>For example, configuring an application server requires different steps than
configuring a file server. See
<!--Original XRef content: '&xd2;Administering Application Services&xd3; on
page&numsp;99'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.32">.</Para>
</ListItem>
</OrderedList>
</Sect1>
<Sect1 Id="SAG.ClSrv.div.8">
<Title Id="SAG.ClSrv.mkr.6">Configuring Base Operating System Networking for the Desktop<IndexTerm><Primary>networking</Primary><Secondary>base configuration</Secondary></IndexTerm></Title>
<Para>The desktop requires the following base networking configuration:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Users must have a login account on the session server and on each system
providing desktop services to the session server. The user must have the
same user ID and group ID on all client and server systems.</Para>
</ListItem>
<ListItem>
<Para>Systems must have access to remote file systems containing data used by the
session and other applications.</Para>
</ListItem>
<ListItem>
<Para>The <Command>lp</Command> print spooler must be configured to access remote printers.</Para>
</ListItem>
<ListItem>
<Para><Command>sendmail</Command> must be configured for email services.</Para>
</ListItem>
<ListItem>
<Para>X authorization must be set up.</Para>
</ListItem>
</ItemizedList>
<Sect2 Id="SAG.ClSrv.div.9">
<Title>Providing Login Accounts to Users<IndexTerm><Primary>login accounts</Primary></IndexTerm></Title>
<Para>This section describes the login account requirements for desktop networking.</Para>
<Sect3 Id="SAG.ClSrv.div.10">
<Title>Providing Login Accounts</Title>
<Para>Users must have a login account on:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>All systems providing services to the desktop, including application servers,
file servers, and systems providing networked printers.</Para>
</ListItem>
<ListItem>
<Para>All session servers the user may access. Usually, session servers are used
with X terminals.</Para>
</ListItem>
</ItemizedList>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.11">
<Title>Providing Consistent User and Group IDs</Title>
<Para>UNIX users are identified by a login name and a<IndexTerm>
<Primary>UID</Primary>
</IndexTerm><IndexTerm>
<Primary>user ID</Primary>
</IndexTerm>
numeric user ID (UID). In a
desktop network, the user should have the same login name and UID on all
client and server systems.</Para>
<Para>UNIX users are also assigned to one or more login groups. Each group has a
group name and a numeric group ID<IndexTerm>
<Primary>GID</Primary>
</IndexTerm><IndexTerm>
<Primary>group ID</Primary>
</IndexTerm>
(GID). In a desktop network, all systems
should use consistent group names and group IDs.</Para>
<Para>For more information, see the <Filename MoreInfo="RefEntry">id</Filename>(1) or <Filename MoreInfo="RefEntry">id</Filename>(1m) man page.</Para>
</Sect3>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.12">
<Title Id="SAG.ClSrv.mkr.7">Configuring Distributed File System Access<IndexTerm><Primary>files</Primary><Secondary>access to distributed</Secondary></IndexTerm></Title>
<Para>The desktop uses NFS for sharing files between systems. You must
identify all the file systems in your network that contain shared files
and ensure that they are correctly mounted on all appropriate systems.<IndexTerm><Primary>file sharing</Primary></IndexTerm><IndexTerm><Primary>NFS</Primary></IndexTerm><IndexTerm><Primary>files</Primary><Secondary>remote access</Secondary></IndexTerm><IndexTerm><Primary>files</Primary><Secondary>mounting</Secondary></IndexTerm>
</Para>
<Para>Typically, you must provide the following remote file access:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The<IndexTerm>
<Primary>home directory</Primary>
<Secondary>shared</Secondary>
</IndexTerm>
user's home directory must be shared by all desktop client and server
systems. This is necessary because:</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>The home directory contains data files that must be accessed by
applications on remote systems. For example, applications using data files
frequently use the home directory as the default data file location.</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>authentication directory</Primary>
</IndexTerm><IndexTerm>
<Primary>dtspcd</Primary>
<Secondary>authentication directory</Secondary>
</IndexTerm>The home directory is the default <Command>dtspcd</Command> authentication directory. For
more information about the <Command>dtspcd</Command>, see
<!--Original XRef content: '&xd2;Configuring the Subprocess
Control Daemon&xd3; on page&numsp;97'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.25">.</Para>
</ListItem>
</ItemizedList>
</ListItem>
<ListItem>
<Para>If users require access to data files that are not in their home directory, these
data files must be shared by all the desktop client and server systems that
operate on the data files.</Para>
</ListItem>
<ListItem>
<Para>The desktop installation and configuration directories (<Filename>/usr/dt</Filename> and
<Filename>/etc/dt</Filename>) must be shared by all the desktop client and server systems so
that all of the user's applications access the same desktop configuration files.</Para>
</ListItem>
</ItemizedList>
<Sect3 Id="SAG.ClSrv.div.13">
<Title>Providing a Networked Home Directory<IndexTerm><Primary>home directory</Primary><Secondary>networked</Secondary></IndexTerm></Title>
<Para>A desktop network works most effectively when users have a single home
directory that is shared among all client and server systems on the network.</Para>
<Para>A networked home directory lets users use different systems in the network
without losing personal customizations and configurations. This is because
personal customizations and the information required to restore the previous
session are saved in subdirectories of the home directory.</Para>
<Para>A common home directory is also required by:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The default X authorization mechanism. See
<!--Original XRef content: '&xd2;Configuring X Authorization&xd3;
on page&numsp;93'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.17">.</Para>
</ListItem>
<ListItem>
<Para>The desktop subprocess control daemon, which is involved in launching
remote applications, must be able to write to the user's home directory.</Para>
</ListItem>
</ItemizedList>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.14">
<Title>File-Name Consistency<IndexTerm><Primary>files</Primary><Secondary>name consistency</Secondary></IndexTerm><IndexTerm><Primary>file-name consistency</Primary></IndexTerm></Title>
<Para>You should configure the network so that users can access their data files from
all systems using the same name. This is known as providing <Emphasis>file-name
consistency</Emphasis>, and is usually accomplished by creating appropriate<IndexTerm>
<Primary>symbolic links</Primary>
<Secondary>file-name consistency</Secondary>
</IndexTerm>
symbolic links.
For example you can configure every system so that each user's home
directory is available as <Filename>/users/</Filename><Symbol Role="Variable">login_name</Symbol> by creating a symbolic link to the
actual mount location of the directory.</Para>
</Sect3>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.15">
<Title>Configuring Access to Remote Printers<IndexTerm><Primary>printers</Primary><Secondary>remote access</Secondary></IndexTerm></Title>
<Para>The desktop uses the<IndexTerm>
<Primary>lp print spooler</Primary>
</IndexTerm>
<Command>lp</Command> print spooler for accessing local or remote printers.
See the <Filename MoreInfo="RefEntry">lpadmin</Filename>(1m) man page for information on configuring the <Command>lp</Command> spooler.</Para>
<Para><IndexTerm>
<Primary>printing</Primary>
<Secondary>testing</Secondary>
</IndexTerm>Before attempting to print using the desktop graphical interface, you should
test that you can correctly print to all printers using the<IndexTerm>
<Primary>lp command</Primary>
</IndexTerm>
<Command>lp</Command> command.</Para>
<Para><IndexTerm>
<Primary>printers</Primary>
<Secondary>device names</Secondary>
</IndexTerm>It is highly recommended that you use consistent printer device names. For
example, if a particular printer is known as <Filename>Postscript1</Filename> on the system to
which it is directly connected, all other systems accessing the printer remotely
should also use the name <Filename>Postscript1</Filename>.</Para>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.16">
<Title>Configuring Electronic Mail<IndexTerm><Primary>electronic mail, configuring</Primary></IndexTerm><IndexTerm><Primary>networking</Primary><Secondary>electronic mail</Secondary></IndexTerm></Title>
<Para>The desktop mailer uses <Command>sendmail</Command> for delivering mail between systems. See
the<IndexTerm>
<Primary>sendmail</Primary>
</IndexTerm>
<Filename MoreInfo="RefEntry">sendmail</Filename>(1m) man page for more information on how to configure email
connectivity.</Para>
<Para>Before attempting to send or receive mail from the desktop, you should test
that you can correctly send and receive mail using the<IndexTerm>
<Primary>mailx</Primary>
</IndexTerm>
<Command>mailx</Command> command.</Para>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.17">
<Title Id="SAG.ClSrv.mkr.8">Configuring X Authorization<IndexTerm><Primary>X authorization</Primary></IndexTerm><IndexTerm><Primary>authorization, X</Primary></IndexTerm><IndexTerm><Primary>networking</Primary><Secondary>X authorization</Secondary></IndexTerm></Title>
<Para>The desktop uses the default X mechanism for authorizing remote applications
(X clients) to access a local display. The easiest way to configure this is to
provide a networked home directory for each user. This ensures that the
following requirements are met:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The user must have read and write permission to the file
<Symbol Role="Variable">HomeDirectory</Symbol><Filename>/.Xauthority.</Filename></Para>
</ListItem>
<ListItem>
<Para>The <Filename>.Xauthority</Filename> file on an application server must contain the &ldquo;magic
cookie&rdquo; for the display on which the application will run.</Para>
</ListItem>
</ItemizedList>
<Para>For more information, see the <Filename MoreInfo="RefEntry">X</Filename>(1) or <Filename MoreInfo="RefEntry">xauth</Filename>(1) man pages.</Para>
</Sect2>
</Sect1>
<Sect1 Id="SAG.ClSrv.div.18">
<Title Id="SAG.ClSrv.mkr.9">Configuring Desktop Clients and Servers<IndexTerm><Primary>clients</Primary><Secondary>of server, configuring</Secondary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>configuring</Secondary></IndexTerm><IndexTerm><Primary>networking</Primary><Secondary>configuring clients and servers</Secondary></IndexTerm></Title>
<Para>This section covers network configuration requirements that are specific to the
desktop&mdash;that is, these capabilities are provided by the desktop rather than by
the base operating system.</Para>
<Para>The section is divided into two parts:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Configuring login and session services.</Para>
</ListItem>
<ListItem>
<Para>Configuring services required by applications and their data. This includes
application, database, icon, file, and help servers and their clients.</Para>
</ListItem>
</ItemizedList>
<Sect2 Id="SAG.ClSrv.div.19">
<Title>Configuring Login and Session Services<IndexTerm><Primary>session servers, See login servers&lt</Primary></IndexTerm><IndexTerm><Primary>login servers</Primary><Secondary>configuring</Secondary></IndexTerm></Title>
<Para>A login/session server is a system that supplies desktop services (Login
Manager, Session Manager, File Manager, Window Manager, etc.) to a display
and X server.</Para>
<Para>Typically, a session server supplies services to X terminals. However, a network
configuration can be set up that concentrates session services on one or more
servers that are accessed by both X terminals and workstations.</Para>
<Para>The Login Manager is the desktop component responsible for supplying login
services to other displays. Once the user has logged in, the Session Manager is
started for the user.<IndexTerm><Primary>servers</Primary><Secondary>session</Secondary></IndexTerm><IndexTerm><Primary>X terminals</Primary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>login</Secondary></IndexTerm>
</Para>
<Para>For information about configuring login/session servers and X terminals, see
<!--Original XRef content: '&xd2;Displaying a Login Screen on a Network Display&xd3; on page&numsp;6'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.LogMg.mkr.6">.</Para>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.19a">
<Title>Configuring Input Method Servers<IndexTerm><Primary>input method servers</Primary><Secondary>configuring</Secondary></IndexTerm></Title>
<Para>An Input Method Server (IMS) is launched by the <command>dtimsstart</command> command.
<command>dtimsstart</command> is normally invoked automatically
at Xsession startup (user login) by the script
<filename>/usr/dt/config/Xsession.d/0020.dtims</filename>.
</para>
<para>Depending on the currently selected locale, environment variables,
configuration files, and command-line options, <command>dtimsstart</command>
displays a selection window from which the user can select the IMS to
use. From the selection window, the user can also request to start an
IMS on a remote system. In this case, <command>dtimsstart</command>:
</para>
<itemizedlist>
<listitem>
<para>Executes the <Symbol>DtImsGetRemoteConf</Symbol>
action to retrieve information about IMSs registered on the specified remote system
</para>
</listitem>
<listitem>
<para>Lists the registered IMSs in the selection window
</para>
</listitem>
<listitem>
<para>Executes the <Symbol>DtImsRunRemoteIms</Symbol>
action to start the user-selected IMS on the remote system
</para>
</listitem>
</itemizedlist>
<para>When searching for IMSs on a remote system,
<command>dtimsstart</command> retrieves only registered IMSs.
To be registered on a system (local or remote), an IMS
must:
</para>
<itemizedlist>
<listitem>
<para>Be defined in the entry file for the current locale.
Each locale has its own entry file that lists the IMSs that
support that locale. The location of the locale entry file is
<filename>/usr/dt/config/ims/&lt;locale_name></filename>.
</para>
</listitem>
<listitem>
<para>Have its own entry file on the system.
The IMS entry file describes the attributes of an IMS.
The attributes include the supported protocols,
the name of the server on which the IMS runs,
the command line options for the IMS, and an
indication whether the IMS allows remote execution or not.
The location of the IMS entry files is
<filename>/usr/dt/config/ims/&lt;ims_name></filename>.
</para>
</listitem>
</itemizedlist>
<para>For descriptions of the file formats, with examples, refer to the
<command>dtimsstart</command> man page.
</para>
<para>To define the hosts on which an IMS can be found, you can configure the
<literal>imServerHosts</literal> application resource. This resource (which is
used by the Style Manager when identifying IMSs for user selection) contains a comma-separated
list of host names. For example:
</para>
<programlisting>*imServerHosts: xylo,expo
</programlisting>
</sect2>
<Sect2 Id="SAG.ClSrv.div.20">
<Title>Configuring Other Application-Related Services</Title>
<Para>This section covers networking requirements common to the desktop:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para><IndexTerm>
<Primary>application servers</Primary>
<Secondary>configuring</Secondary>
</IndexTerm><IndexTerm>
<Primary>servers</Primary>
<Secondary>application</Secondary>
</IndexTerm>Application servers</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>database servers</Primary>
<Secondary>configuring</Secondary>
</IndexTerm><IndexTerm>
<Primary>servers</Primary>
<Secondary>database</Secondary>
</IndexTerm>Database servers</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>icon servers</Primary>
<Secondary>configuring</Secondary>
</IndexTerm><IndexTerm>
<Primary>servers</Primary>
<Secondary>icon</Secondary>
</IndexTerm>Icon servers</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>help servers</Primary>
<Secondary>configuring</Secondary>
</IndexTerm><IndexTerm>
<Primary>servers</Primary>
<Secondary>help</Secondary>
</IndexTerm>Help servers</Para>
</ListItem>
</ItemizedList>
<Sect3 Id="SAG.ClSrv.div.21" Role="Procedure">
<Title Id="SAG.ClSrv.mkr.10">To Configure Desktop Clients and Servers</Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>files</Primary>
<Secondary>required for networking</Secondary>
</IndexTerm><IndexTerm>
<Primary>networking</Primary>
<Secondary>files required for</Secondary>
</IndexTerm>Install the desktop or the minimum set of files:</Para>
<Para>You must install:</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>The entire Common Desktop Environment runtime file sets</Para>
</ListItem>
<ListItem>
<Para><Emphasis>Or</Emphasis>, these sets of files:<IndexTerm><Primary>CDE-MIN files</Primary></IndexTerm><IndexTerm><Primary>CDE-TT files</Primary></IndexTerm>
CDE-MIN and CDE-TT
</Para>
</ListItem>
</ItemizedList>
<Note>
<Para>Installation and file sets may differ among vendors.</Para>
</Note>
</ListItem>
<ListItem>
<Para>Configure the system for the ToolTalk
filename database server daemon <Command>rpc.ttdbserver.</Command><IndexTerm><Primary>filename database server</Primary></IndexTerm><IndexTerm><Primary>rpc.ttdbserver</Primary></IndexTerm>
</Para>
<Para>This should happen automatically when the desktop is installed. For more
information, see
<!--Original XRef content: '&xd2;Configuring the ToolTalk Database Server&xd3; on page&numsp;98'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.29">.</Para>
</ListItem>
<ListItem>
<Para>Install and configure the subprocess control daemon (<Command><IndexTerm>
<Primary>dtspcd</Primary>
</IndexTerm>dtspcd</Command>).</Para>
<Para>This should happen automatically when the desktop is installed. For more
information, see
<!--Original XRef content: '&xd2;Configuring the Subprocess Control Daemon&xd3; on page&numsp;97'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.25">.</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>files</Primary>
<Secondary>remote data</Secondary>
</IndexTerm>Mount all required remote data.</Para>
<Para>Data is considered &ldquo;remote&rdquo; when it is located on a system other than the
system on which the application using the data is running.</Para>
<Para>For example:</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>If an application uses data located on a file server, it must mount those
files.</Para>
</ListItem>
<ListItem>
<Para>If File Manager icons are located on an icon server, the session server must
mount those files.</Para>
</ListItem>
<ListItem>
<Para>If the network uses a help server for desktop help files, the session server
and all application servers must mount the help data.</Para>
<Para>For more information about mount points, see the next section,
<!--Original XRef content: '&xd2;Configuring the Mount Point for Remote File Systems'--><XRef Role="SectionTitle" Linkend="SAG.ClSrv.div.22">.</Para>
</ListItem>
</ItemizedList>
</ListItem>
</OrderedList>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.22">
<Title Id="SAG.ClSrv.mkr.11">Configuring the Mount Point for Remote File Systems<IndexTerm><Primary>files</Primary><Secondary>mount point</Secondary></IndexTerm><IndexTerm><Primary>mount point for remote files</Primary></IndexTerm></Title>
<Para><IndexTerm>
<Primary>file-name mapping</Primary>
</IndexTerm>When the desktop passes file names from one system to another, it must
transform, or <Emphasis>map</Emphasis>, those file names to names that make sense to the destinition
system. This mapping is necessary because a file may be mounted in different
locations on the different systems, and therefore must be accessed using
different names. For example the file /<Filename>projects/big</Filename> on <Command>sysA</Command> may be
accessed as <Filename>/net/sysA/projects/big</Filename> on <Command>sysB</Command>.</Para>
<Sect4 Id="SAG.ClSrv.div.23">
<Title>Requirements for File-Name Mapping</Title>
<Para>To correctly perform this file-name mapping, one of the following must be true:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The <Command>mount</Command> command is used to statically mount file systems. These types of
static mounts are typically configured in a file such as <Filename>/etc/checklist</Filename>,
<Filename>/etc/mnttab</Filename>, or <Filename>/etc/filesystems</Filename>.</Para>
<Para>For file-name mapping to work correctly between systems, file system
mounts must use consistent host names. If a host is known by several names
(for example, aliases, or if the host has more than one LAN address that are
known by different names), you must use the same name and form of the
name for all mounts.</Para>
</ListItem>
<ListItem>
<Para><Emphasis>Or</Emphasis>, the automounter is used to mount file systems at the default <Filename>/net</Filename>
mount point.</Para>
</ListItem>
<ListItem>
<Para><Emphasis>Or</Emphasis>, the<IndexTerm>
<Primary>automounter</Primary>
</IndexTerm>
automounter is used to mount file systems at a location other than
<Filename>/net</Filename> and the DTMOUNTPOINT environment variable is set to indicate the
mount point. See the next section,
<!--Original XRef content: '&xd2;Setting a Value for DTMOUNTPOINT'--><XRef Role="SectionTitle" Linkend="SAG.ClSrv.div.24">.</Para>
</ListItem>
</ItemizedList>
<Para>For information about the automounter, see the <Filename MoreInfo="RefEntry">automount</Filename>(1m) man page.</Para>
</Sect4>
<Sect4 Id="SAG.ClSrv.div.24">
<Title Id="SAG.ClSrv.mkr.12">Setting a Value for<IndexTerm><Primary>DTMOUNTPOINT variable</Primary><Secondary>setting</Secondary></IndexTerm>DTMOUNTPOINT</Title>
<Para><IndexTerm>
<Primary>DTMOUNTPOINT variable</Primary>
<Secondary>processes that use</Secondary>
</IndexTerm>You must set the DTMOUNTPOINT environment variable if both of the
following conditions are true:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The automounter is used to mount file systems.</Para>
</ListItem>
<ListItem>
<Para><Emphasis>And</Emphasis>, remote file systems are mounted at a location other than <Filename>/net</Filename>.</Para>
</ListItem>
</ItemizedList>
<Para><IndexTerm>
<Primary>DTMOUNTPOINT variable</Primary>
<Secondary>processes requiring</Secondary>
</IndexTerm>DTMOUNTPOINT must be set for processes, including:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The user's desktop processes that are automatically started when the user
logs in, such as the Workspace Manager (<Command>dtwm</Command>) and File Manager (<Command>dtfile</Command>)</Para>
</ListItem>
<ListItem>
<Para>System processes such as <Filename><IndexTerm>
<Primary>rpc.ttdbserver</Primary>
</IndexTerm>rpc.ttdbserver</Filename> and <Command>dtspcd</Command> that are started by
mechanisms such as <Command>inetd</Command></Para>
</ListItem>
<ListItem>
<Para>Applications that are started by the desktop on local or remote systems</Para>
</ListItem>
<ListItem>
<Para>Applications that are started by the user from a shell command line</Para>
</ListItem>
</ItemizedList>
<Para>To set DTMOUNTPOINT for all of these processes&rdquo;</Para>
<OrderedList>
<ListItem>
<Para>Edit the file <Filename>/etc/inetd.conf</Filename>:<IndexTerm><Primary>inetd.conf</Primary></IndexTerm>
</Para>
<orderedlist>
<ListItem>
<Para>Find the <Command><IndexTerm>
<Primary>dtspcd</Primary>
</IndexTerm>dtspcd</Command> entry and add:</Para>
<programlisting>-mount_point <Symbol Role="Variable">mount_point</Symbol></programlisting>
</ListItem>
<ListItem>
<Para>Find the <Filename>rpc.ttdbserver</Filename> entry and add:</Para>
<programlisting>-m <Symbol Role="Variable">mount_point</Symbol></programlisting>
<Para>For example if the automounter is being used with a mount point of <Command>/nfs</Command>,
the entries in <Filename>/etc/inetd.conf</Filename> are:</Para>
<ProgramListing>dtspc stream tcp nowait root /usr/dt/bin/dtspcd /usr/dt/bin/dtspcd -mount_point /nfs
rpc stream tcp wait root /usr/dt/bin/rpc.ttdbserver 100083 1 rpc.ttdbserver -m /nfs</ProgramListing>
</ListItem>
</OrderedList>
</ListItem>
<ListItem>
<Para>Perform the procedure on your system that rereads <Filename>/etc/inetd.conf</Filename>. For
more information, see the <Filename MoreInfo="RefEntry">inetd</Filename>(1m) man page.</Para>
</ListItem>
<ListItem>
<Para><IndexTerm>
<Primary>DTMOUNTPOINT variable</Primary>
<Secondary>inherited by users</Secondary>
</IndexTerm>Set DTMOUNTPOINT such that its value is inherited by user logins.</Para>
<Para>This can be done by setting the variable in <Filename>/etc/dt/config/Xsession.d</Filename>.
For more information on setting environment variables, see
<!--Original XRef content: '&xd2;To Set
Environment Variables&xd3; on page&numsp;32'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.SesMg.mkr.9">.</Para>
</ListItem>
</OrderedList>
</Sect4>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.25">
<Title Id="SAG.ClSrv.mkr.13">Configuring the Subprocess Control Daemon</Title>
<Para>The desktop<IndexTerm>
<Primary>subprocess control service, See SPC&lt;$nopage></Primary>
</IndexTerm>
subprocess control (<IndexTerm>
<Primary>SPC</Primary>
</IndexTerm>SPC) service provides client/server command
execution.</Para>
<Para>The desktop<IndexTerm>
<Primary>subprocess control daemon, See dtspcd&lt;$nopage></Primary>
</IndexTerm>
subprocess control daemon (<Command><IndexTerm>
<Primary>dtspcd</Primary>
</IndexTerm>dtspcd</Command>) is used by the desktop to
launch remote applications. It is an <Command>inet</Command> daemon that accepts requests from
remote clients to execute commands. For more information on how to
configure <Command>inet</Command> daemons, see the <Filename MoreInfo="RefEntry">inetd.conf</Filename>(1m) man page.</Para>
<Para>The desktop action invocation library uses the SPC service to invoke remote
actions.</Para>
<Sect4 Id="SAG.ClSrv.div.26">
<Title>To Configure<IndexTerm><Primary>dtspcd</Primary><Secondary>configuring</Secondary></IndexTerm> dtspcd</Title>
<OrderedList>
<ListItem>
<Para>Confirm that <Command>dtspc</Command> is properly registered in both <Filename>/etc/services</Filename> and
<Filename>/etc/inetd.conf</Filename>. See the <Filename MoreInfo="RefEntry">dtspcd</Filename>(1m) man page.</Para>
</ListItem>
<ListItem>
<Para>HP-UX only: Ensure that <Filename>/usr/adm/inetd.sec</Filename> is properly configured.
See the <Filename MoreInfo="RefEntry"><IndexTerm>
<Primary>inetd.sec</Primary>
</IndexTerm>inetd.sec(4)</Filename> man page.</Para>
</ListItem>
</OrderedList>
</Sect4>
<Sect4 Id="SAG.ClSrv.div.27">
<Title><IndexTerm><Primary>SPC</Primary><Secondary>security</Secondary></IndexTerm>SPC Security</Title>
<Para>Authentication for the subprocess control service is based on file system
authentication. The <Command>dtspcd</Command> must have access to an <Emphasis>authentication directory</Emphasis> that
is also mounted by all SPC client systems.</Para>
<Para>By default the <Command><IndexTerm>
<Primary>dtspcd</Primary>
<Secondary>authentication directory</Secondary>
</IndexTerm><IndexTerm>
<Primary>authentication directory</Primary>
</IndexTerm>dtspcd</Command> authentication directory is the user's home directory.
However, you can configure the <Command>dtspcd</Command> to use a different location by setting
the <Filename>-auth_dir</Filename> option in the <Filename>/etc/inetd.conf</Filename> directory. See the
<Filename>dtspcd</Filename>(1m) man page for more information.</Para>
<Para>Because SPC authentication is based on file system authentication, the SPC
service is only as secure as your distributed file system. If you are using the
desktop in a network where you do not trust the distributed file system, you
may wish to disable the <Command>dtspcd</Command>. To disable the <Command>dtspcd</Command>, comment out the
<Command>dtspc</Command> entry in <Filename>/etc/services</Filename>.</Para>
</Sect4>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.28">
<Title><IndexTerm><Primary>environment variables</Primary><Secondary>remote execution</Secondary></IndexTerm>Configuring Environment Variables for Remote Execution</Title>
<Para>When the desktop uses an action to start an application on a remote system,
the user's environment variables are copied to the remote system and placed in
the environment of the application.</Para>
<Para>By default, some of the environment variables are altered before they are
copied to the remote system. You can configure both the action invocation
component and the subprocess control service of the desktop to perform
additional environment variable processing before the variables are placed into
the application's environment.</Para>
<Para>For more information on the default configuration and how to modify it,
see the <Filename>dtactionfile(4)</Filename> and <Filename>dtspcdenv(4)</Filename> man pages.</Para>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.29">
<Title Id="SAG.ClSrv.mkr.14">Configuring the ToolTalk Database Server<IndexTerm><Primary>ToolTalk</Primary><Secondary>Database Server, See rpc.ttdbserver</Secondary></IndexTerm></Title>
<Para>One component of ToolTalk is the ToolTalk database server,
<Filename>/usr/dt/bin/rpc.ttdbserver</Filename>.</Para>
<Para>The ToolTalk database server is used by the ToolTalk messaging service and for
file-name mapping. It is usually registered in <Filename>/etc/inetd.conf</Filename> when the
desktop is installed and needs no additional configuration.</Para>
<Para>For more information on the ToolTalk database server and its configuration
options, see the <Filename>rpc.ttdbserver</Filename>(1m) man page.</Para>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.30">
<Title>Configuring the ToolTalk Message Server<IndexTerm><Primary>ToolTalk Message Server, See ttsession</Primary></IndexTerm></Title>
<Para>The ToolTalk message server is <Command>ttsession</Command>.
By default, it does not require any
configuration; it is started by the <Command>Xession</Command> script during login.</Para>
<Para>See the <Command>ttsession</Command> man page for more information on the ToolTalk message
server and its configuration options.<IndexTerm><Primary>ttsession</Primary></IndexTerm>
</Para>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.31">
<Title>Configuring the<IndexTerm><Primary>Calendar daemon</Primary></IndexTerm>Calendar Daemon</Title>
<Para>One component of the Calendar application is the Calendar daemon
<Filename><IndexTerm>
<Primary>rpc.cmsd</Primary>
</IndexTerm>rpc.cmsd</Filename>. It is usually registered in <Filename>/etc/inetd.conf</Filename> when the desktop is
installed and needs no additional configuration.</Para>
<Para>For more information on the Calendar daemon and its configuration options,
see the <Filename>rpc.cmsd</Filename><Filename MoreInfo="RefEntry"></Filename>(1) man page.</Para>
</Sect3>
</Sect2>
</Sect1>
<Sect1 Id="SAG.ClSrv.div.32">
<Title Id="SAG.ClSrv.mkr.15">Administering Application Services<IndexTerm><Primary>application servers</Primary><Secondary>administering</Secondary></IndexTerm></Title>
<Para>This section covers specific configuration requirements for:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Application servers and their clients</Para>
</ListItem>
<ListItem>
<Para>Desktop servers that provide special services&mdash;database servers, icon
servers, and help servers</Para>
</ListItem>
</ItemizedList>
<Para>It also covers networking requirements for two special configurations for
networked applications:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Remote execution hosts</Para>
</ListItem>
<ListItem>
<Para>Applications running across file system mounts</Para>
</ListItem>
</ItemizedList>
<Sect2 Id="SAG.ClSrv.div.33">
<Title>Search Path Environment Variables</Title>
<Para>The desktop uses a set of environment variables to specify the search path used
to find application desktop configuration files such as the actions and data
types database, help files, and icon files.</Para>
<Para>For information on how to use the search path environment variables, see
<!--Original XRef content: 'Chapter&numsp;7, &xd2;Desktop Search Paths'--><XRef Role="ChapNumAndTitle" Linkend="SAG.Datab.div.1">,'' or the <Filename MoreInfo="RefEntry">dtenvvar(5)</Filename> man page.</Para>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.34">
<Title>Configuring an Application Server and Its Clients<IndexTerm><Primary>remote execution</Primary><Secondary>configuring application server</Secondary></IndexTerm></Title>
<Para>In the standard application server configuration, the application server
contains all the binary and configuration files associated with the application,
including:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The application executable(s)</Para>
</ListItem>
<ListItem>
<Para>Standard application configuration files such as app-defaults, message
catalogs, and shared libraries for that application.</Para>
</ListItem>
<ListItem>
<Para>Desktop configuration files:</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>Action and data type definition files</Para>
</ListItem>
<ListItem>
<Para>Icon image files</Para>
</ListItem>
<ListItem>
<Para>Desktop help data files</Para>
</ListItem>
</ItemizedList>
</ListItem>
</ItemizedList>
<Figure>
<Title>Standard application server configuration<IndexTerm><Primary>application servers</Primary><Secondary>standard configuration</Secondary></IndexTerm></Title>
<Graphic Entityref="SAG.ClSrv.fig.5" Id="SAG.ClSrv.grph.5"></Graphic>
</Figure>
<Sect3 Id="SAG.ClSrv.div.35" Role="Procedure">
<Title>To Configure an Application Server<IndexTerm><Primary>application servers</Primary><Secondary>configuring</Secondary></IndexTerm></Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for servers.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Install the application(s).</Para>
</ListItem>
<ListItem>
<Para>If an application does not automatically register itself, you must perform the
registration procedure.</Para>
<Para>See
<!--Original XRef content: 'Chapter&numsp;4, &xd2;Registering an Application'--><XRef Role="ChapNumAndTitle" Linkend="SAG.RegAp.mkr.1">.</Para>
</ListItem>
</OrderedList>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.36" Role="Procedure">
<Title>To Configure the Client of an Application Server<IndexTerm><Primary>application servers</Primary><Secondary>client of</Secondary></IndexTerm><IndexTerm><Primary>application servers</Primary><Secondary>configuring client of</Secondary></IndexTerm></Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for clients.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Add the application server to the application search path on a system-wide
or personal basis:</Para>
<InformalTable>
<TGroup Cols="2" colsep="0" rowsep="0">
<colspec colwidth="1.01in">
<colspec colwidth="3.88in">
<TBody>
<Row>
<Entry><Para>System-wide</Para></Entry>
<Entry><Para>Set the DTSPSYSAPPHOSTS variable in
<Filename>/etc/dt/config/Xsession.d/0010.dtpaths</Filename><IndexTerm><Primary>DTSPSYSAPPHOSTS variable</Primary></IndexTerm>
</Para></Entry>
</Row>
<Row>
<Entry><Para>Personal</Para></Entry>
<Entry><Para>Set the DTSPUSERAPPHOSTS variable in
<Symbol Role="Variable">HomeDirectory</Symbol><Filename>/.dtprofile</Filename><IndexTerm><Primary>DTSPUSERAPPHOSTS variable</Primary></IndexTerm>
</Para></Entry>
</Row>
</TBody>
</TGroup>
</InformalTable>
</ListItem>
</OrderedList>
<Para>For example, the following line in
/<Filename>etc/dt/config/Xsession.d/0010.dtpaths</Filename> adds a system with
hostname <Command>SysAAA</Command> and <Command>SysBBB</Command> to the application search path:</Para>
<ProgramListing>DTSPSYSAPPHOSTS=SysAAA:,SysBBB:</ProgramListing>
<Para>For more information about setting the application search path, see:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para><!--Original XRef content: '&xd2;Application Search Path&xd3; on page&numsp;116'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.7"></Para>
</ListItem>
<ListItem>
<Para><!--Original XRef content: '&xd2;Setting the Value of a Search Path&xd3; on page&numsp;115'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.3"></Para>
</ListItem>
</ItemizedList>
</Sect3>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.37">
<Title Id="SAG.ClSrv.mkr.16">Configuring Database, Icon, and Help Services<IndexTerm><Primary>icon servers</Primary><Secondary>configuring</Secondary></IndexTerm><IndexTerm><Primary>help servers</Primary><Secondary>configuring</Secondary></IndexTerm><IndexTerm><Primary>database servers</Primary><Secondary>configuring</Secondary></IndexTerm><IndexTerm><Primary>database servers</Primary><Secondary>configuring</Secondary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>actions</Secondary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>data types</Secondary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>actions</Secondary></IndexTerm><IndexTerm><Primary>servers</Primary><Secondary>data types</Secondary></IndexTerm><IndexTerm><Primary>data types</Primary><Secondary>server for</Secondary></IndexTerm><IndexTerm><Primary>actions</Primary><Secondary>server for</Secondary></IndexTerm></Title>
<Para>Usually, the action and data type definitions, icons, and help data files
associated with an application are installed onto the same system as the
application.</Para>
<Para>For example, consider the typical configuration of help data files:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>The help files for File Manager are usually located on the session server. The
desktop finds them because the help search path automatically searches the
proper locations on the session server.</Para>
</ListItem>
<ListItem>
<Para>The help files for other applications are usually located on the same
application server as the application. The session server finds them because
modifying the application search path automatically modifies the help
search path.</Para>
</ListItem>
</ItemizedList>
<Para>There may be situations in which you want to place database (actions and data
types), help, or icon data elsewhere on the network. For example, if your
network uses multiple session servers, you might want to create a help server
on which all the help data files for desktop applications (File Manager, Style
Manager, etc.) are stored. This conserves disk space because the help files do
not need to be duplicated on each session server.</Para>
<Sect3 Id="SAG.ClSrv.div.38" Role="Procedure">
<Title Id="SAG.ClSrv.mkr.17">To Create a Database, Help, or Icon Server<IndexTerm><Primary>database servers</Primary><Secondary>creating</Secondary></IndexTerm><IndexTerm><Primary>icon servers</Primary><Secondary>creating</Secondary></IndexTerm><IndexTerm><Primary>help servers</Primary><Secondary>creating</Secondary></IndexTerm></Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for clients.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para Id="SAG.ClSrv.mkr.18">Install the database, help, or icon files.</Para>
<Para>The files can be located anywhere on the system. However, it may be easier
to use the following locations, since these are the directories automatically
searched when a system has been designated an application server.</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>Database files: <Filename>/etc/dt/appconfig/types/</Filename><Symbol Role="Variable">language</Symbol></Para>
</ListItem>
<ListItem>
<Para>Help files: <Filename>/etc/dt/appconfig/help/</Filename><Symbol Role="Variable">language</Symbol>
</Para>
</ListItem>
<ListItem>
<Para>Icon files: <Filename>/etc/dt/appconfig/icons/</Filename><Symbol Role="Variable">language</Symbol>
</Para>
</ListItem>
</ItemizedList>
<Para>If you are setting up a database server, the actions must be written to specify
where their commands (<Filename>EXEC_STRING</Filename>s) will run. See
<!--Original XRef content: '&xd2;Specifying a Remote
Execution Host&xd3; on page&numsp;104'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.div.41">.</Para>
</ListItem>
</OrderedList>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.39" Role="Procedure">
<Title>To Configure the Session Server to Find a Database, Icon, or Help Server<IndexTerm><Primary>help servers</Primary><Secondary>client of</Secondary></IndexTerm><IndexTerm><Primary>icon servers</Primary><Secondary>client of</Secondary></IndexTerm><IndexTerm><Primary>database servers</Primary><Secondary>client of</Secondary></IndexTerm></Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for clients.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Add the database, icon, or help server to the appropriate search path.</Para>
<ItemizedList Remap="Bullet2">
<ListItem>
<Para>If you placed the data files in the locations specified in
<!--Original XRef content: 'Step&numsp;3'--><XRef Role="Step" Linkend="SAG.ClSrv.mkr.18"> of
<!--Original XRef content: '&xd2;To
Create a Database, Help, or Icon Server'--><XRef Role="SectionTitle" Linkend="SAG.ClSrv.mkr.17">, you can modify the application
search path.</Para>
</ListItem>
<ListItem>
<Para>If you placed the data files in other locations, you must modify the specific
search path.</Para>
<Para>For example, if you placed the help files in directory <Filename>/etc/dt/help</Filename> on
system <Command>SysCCC</Command>, you would add the following line to
/<Filename>etc/dt/config/Xsession.d/0010.dtpaths</Filename>:</Para>
<programlisting>DTSPSYSHELP=/net/SysCCC/etc/dt/help</programlisting>
</ListItem>
</itemizedlist>
<Para>For more information about setting search paths, see:</Para>
<itemizedlist>
<ListItem>
<Para><!--Original XRef content: '&xd2;Database (Action/Data Types) Search Path&xd3; on page&numsp;120'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.14"></Para>
</ListItem>
<ListItem>
<Para><!--Original XRef content: '&xd2;Icon Search Path&xd3; on page&numsp;122'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.20"></Para>
</ListItem>
<ListItem>
<Para><!--Original XRef content: '&xd2;Help Search Path&xd3; on page&numsp;123'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.26"></Para>
</ListItem>
<ListItem>
<Para><!--Original XRef content: '&xd2;Setting the Value of a Search Path&xd3; on page&numsp;115'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.3"></Para>
</ListItem>
</ItemizedList>
</ListItem>
</OrderedList>
</Sect3>
</Sect2>
<Sect2 Id="SAG.ClSrv.div.40">
<Title>Special Networked Application Configurations</Title>
<Para>This section describes how to configure systems to run applications:</Para>
<ItemizedList Remap="Bullet1">
<ListItem>
<Para>Elsewhere than on the system containing the action&mdash;on a remote execution
host</Para>
</ListItem>
<ListItem>
<Para>Locally across file system mounts</Para>
</ListItem>
</ItemizedList>
<Sect3 Id="SAG.ClSrv.div.41">
<Title Id="SAG.ClSrv.mkr.19">Specifying a Remote Execution Host<IndexTerm><Primary>remote execution</Primary><Secondary>with action remote from application</Secondary></IndexTerm></Title>
<Para>In the typical application server configuration, the action definition is located
on the same system as the application executable. However,<IndexTerm>
<Primary>actions</Primary>
<Secondary>running remote applications</Secondary>
</IndexTerm>
actions can be
written to execute commands on other systems. In this configuration, the
system containing the application is called the <Emphasis><IndexTerm>
<Primary>execution host</Primary>
<Secondary>specifying</Secondary>
</IndexTerm>execution host</Emphasis>.<IndexTerm>
<Primary>EXEC_HOST, See execution host&lt;$nopage></Primary>
</IndexTerm></Para>
<Para>The action definition may be located on the session server or on a system that
provides action and data type services to the session server&mdash;called a <Emphasis><IndexTerm>
<Primary>database servers</Primary>
</IndexTerm><IndexTerm>
<Primary>database host</Primary>
</IndexTerm>database
server</Emphasis> or <Emphasis>database host</Emphasis>.</Para>
<Para>Action definitions use the <Filename>EXEC_HOST</Filename> field to specify where their commands
(<Filename>EXEC_STRING</Filename>s) should be run. For example, the following action definition
specifies that an <Command>xload</Command> client be run on a system with host name <Command>SysDDD</Command>:</Para>
<programlisting>ACTION XloadSysDDD
{ TYPE        COMMAND
 EXEC_HOST    SysDDD
 EXEC_STRING  /usr/bin/X11/xload -label SysDDD
}
</ProgramListing>
<Para>If the <Filename><IndexTerm>
<Primary>EXEC_HOST field</Primary>
<Secondary>multiple values</Secondary>
</IndexTerm>EXEC_HOST</Filename> field specifies more than one host name, then the desktop
tries to execute the <Filename>EXEC_STRING</Filename> on each host in order until it finds one that
can run the action. For example, the following <Filename>EXEC_HOST</Filename> field specifies that
the action should first attempt to run the <Filename>EXEC_STRING</Filename> on <Command>SysDDD</Command>, and,
failing this, try <Command>SysEEE</Command>.</Para>
<ProgramListing>EXEC_HOST  SysDDD,SysEEE</ProgramListing>
<Para>If the <Filename><IndexTerm>
<Primary>EXEC_HOST field</Primary>
<Secondary>default value</Secondary>
</IndexTerm>EXEC_HOST</Filename> field is not set for an action, it defaults to the value
<Filename>&percnt;DatabaseHost&percnt;</Filename>. The value of <Filename>&percnt;DatabaseHost&percnt;</Filename> is obtained from the
database search path.</Para>
<Para>For example, suppose the database search path has been modified by adding
the following line to <Filename>/etc/dt/config/Xsession.d/0010.dtpaths</Filename>:<IndexTerm><Primary>database search path</Primary><Secondary>affect on EXEC_HOST</Secondary></IndexTerm><IndexTerm><Primary>DTSPSYSDATABASEHOSTS variable</Primary><Secondary>effect on EXEC_HOST</Secondary></IndexTerm><IndexTerm><Primary>EXEC_HOST field</Primary><Secondary>affected by database search path</Secondary></IndexTerm>
</Para>
<programlisting>DTSPSYSDATABASEHOSTS=SysAAA:,/net/SysBBB/etc/dt/appconfig/types/C
</ProgramListing>
<Para><Command>SysAAA</Command> is specified using the host-qualified syntax&mdash;<Filename>SysAAA:</Filename>. An action
definition found using this element of the search path sets the database host to
<Command>SysAAA</Command>. However, an action found using the <Filename>/net/SysBBB</Filename>&hellip; portion of the
search path sets the database host to the local system because the syntax does
not include the host qualifier.</Para>
<Sect4 Id="SAG.ClSrv.div.42">
<Title>To Configure the Remote Execution Host<IndexTerm><Primary>execution host</Primary><Secondary>configuring</Secondary></IndexTerm></Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for servers.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Ensure that the applications are properly installed and configured for local
execution.</Para>
</ListItem>
</OrderedList>
</Sect4>
<Sect4 Id="SAG.ClSrv.div.43">
<Title>To Configure the System Containing the Action Definition</Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for servers.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Create and install the action definitions and application groups.</Para>
<Para>See
<!--Original XRef content: '&xd2;Creating Actions that Run Applications on Remote Systems&xd3; on
page&numsp;177'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.CrAct.div.49"> and
<!--Original XRef content: '&xd2;Creating and Administering General Application Groups&xd3; on
page&numsp;45'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.CnfAM.mkr.10">.</Para>
</ListItem>
</OrderedList>
</Sect4>
<Sect4 Id="SAG.ClSrv.div.44">
<Title>To Configure the Session Server</Title>
<OrderedList>
<ListItem>
<Para>Provide the operating system network configurations required by the
desktop.</Para>
<Para>See
<!--Original XRef content: '&xd2;Configuring Base Operating System Networking for the Desktop&xd3; on
page&numsp;90'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.6">.</Para>
</ListItem>
<ListItem>
<Para>Provide the general desktop configuration required for clients.</Para>
<Para>See
<!--Original XRef content: '&xd2;To Configure Desktop Clients and Servers&xd3; on page&numsp;94'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.ClSrv.mkr.10">.</Para>
</ListItem>
<ListItem>
<Para>Modify the actions search path to include the database host.</Para>
<Para>See
<!--Original XRef content: '&xd2;Database (Action/Data Types) Search Path&xd3; on page&numsp;120'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.14">.</Para>
</ListItem>
<ListItem>
<Para>Modify the application search path to include the execution host.</Para>
<Para>See
<!--Original XRef content: '&xd2;Application Search Path&xd3; on page&numsp;116'--><XRef Role="SecTitleAndPageNum" Linkend="SAG.Datab.div.7">.</Para>
</ListItem>
</OrderedList>
</Sect4>
</Sect3>
<Sect3 Id="SAG.ClSrv.div.45">
<Title>Running Applications Locally<IndexTerm><Primary>mounts,running applications across</Primary></IndexTerm><IndexTerm><Primary>applications</Primary><Secondary>running locally across mounts</Secondary></IndexTerm><IndexTerm><Primary>networking</Primary><Secondary>running applications across mounts</Secondary></IndexTerm></Title>
<Para>The standard application server configuration runs applications on the
application server. Sometimes it is desirable to have the application installed
on a remote system but executed locally on the session server.</Para>
<Figure>
<Title>Execution across mount points</Title>
<Graphic Entityref="SAG.ClSrv.fig.6" Id="SAG.ClSrv.grph.6"></Graphic>
</Figure>
<Sect4 Id="SAG.ClSrv.div.46">
<Title>To Configure the Application Server</Title>
<Para>No special configuration is required.</Para>
</Sect4>
<Sect4 Id="SAG.ClSrv.div.47">
<Title>To Configure the Session Server</Title>
<OrderedList>
<ListItem>
<Para>Modify the application search path. Use the local absolute path to the
application.</Para>
</ListItem>
</OrderedList>
<Para>For example, you might use the following variable definition to find an
application registered on <Command>sysAAA</Command>:</Para>
<ProgramListing>DTSPSYSAPPHOSTS=/net/SysAAA/etc/dt/appconfig/appmanager/C</ProgramListing>
<Para>The session server must be able to access the application's configuration files,
such as app-defaults, message catalogs, and shared libraries.</Para>
</Sect4>
</Sect3>
</Sect2>
</Sect1>
</Chapter>
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