dmu - Dataless management utility
/usr/sbin/dmu
The dataless management utility (dmu) manages Dataless
Management Services (DMS) environments and clients, letting
you install, configure, and list DMS environments,
and add, list, modify, or remove DMS clients. DMS maintains
root (/), /usr, and /var file systems on a DMS
server for DMS clients. All swapping and dumping is done
on the DMS client's local disk.
The dmu utility creates a root file system based on the
software subsets installed in the DMS environment area on
the server. This root file system is accessed by DMS
clients over a Local Area Network (LAN). DMS lets system
administrators customize the root file systems before it
is accessed by DMS clients.
Caution
DMS is not supported in a clusters environment. A cluster
member cannot be a DMS server or a dataless client.
Dataless Management Services [Toc] [Back]
The DMS server maintains a separate copy of the root file
system for each DMS client in a client root directory
(usually /clients) in the DMS area. Each DMS root area is
customized for the DMS client to allow for different environmental
requirements.
The DMS server also reserves a DMS area where copies of
the /usr file system reside. The /usr file system is
shared by DMS clients with read-only access.
The server's DMS root and /usr areas are available to DMS
clients through a network file system (NFS), with each
client accessing the DMS disk area on the DMS server over
a LAN. Each DMS client is booted over the network from its
private root area on the DMS server. Once booted, the DMS
client continues to use its root files and /usr files from
the server's DMS area.
DMS Environments [Toc] [Back]
One or more DMS environments can reside in a DMS area.
Each DMS environment contains one or more root areas; a
root area exists for each general type of DMS client supported.
DMS client root areas reside in the /var/adm/dms
directory, and are named /var/adm/dms/dmsN.arch, where N
is a sequentially-assigned integer starting with 0 and
arch is a name identifying the client's machine architecture,
such as alpha. The first DMS area for Alpha clients
would be named /var/adm/dms/dms0.alpha.
DMS Client Areas [Toc] [Back]
DMS maintains a DMS client area in the /clients directory.
Each root area for an individual DMS client is tailored
from the appropriate generic root file system, and contains
a customized kernel to support that DMS client's
actual system configuration.
Each DMS client views its private root area and the shared
/usr area as local although these areas actually reside on
the DMS server and are accessed through NFS. As with the
/var/adm/dms area, multiple client areas can be established
in different partitions.
DMS Software Installation [Toc] [Back]
Use the dmu utility's Install Software option to install
software into each /var/adm/dms/dmsN.arch file system.
All software must be installed and configured in the DMS
server area before DMS clients can be added to the DMS
environment.
DMS Client Registration [Toc] [Back]
Before you use the dmu utility to serve a DMS client, you
must register the DMS client for a DMS area or make an
entry for the DMS client in the /etc/hosts file on the DMS
server. You must have the following information to register
a DMS client: The client's host name. The
/var/adm/dms/dmsN.arch DMS environment where the DMS
client will be registered. The location of the DMS
client's root directory. The path must not exceed 25 characters
and be located under the /clients directory. The
DMS client's network interface, subnet mask, and default
route for this network interface. The DMS client's hardware
network address. The gateway address between the DMS
client and server. The swap device and partition and swap
device type. The type of kernel build support to be provided
for the DMS client.
You must log in as root or have superuser privileges to
invoke the dmu utility.
Tru64 UNIX DMS servers do not support dataless environments
on DMS clients that do not support the BOOTP Internet
Boot Protocol.
DMS is not supported in a clusters environment. A cluster
member cannot be a DMS server or a dataless client.
The following command invokes the dmu utility from the
root system prompt on the DMS server: # /usr/sbin/dmu
You see the DMU Main Menu, and you can select dmu functions.
*** DMU Main Menu ***
Choices without key letters are not available.
a) ADD a client
c) CONFIGURE software environments
d) DELETE software environments
i) INSTALL software environments
l) LIST registered clients
m) MODIFY a client
r) REMOVE a client
s) SHOW software environments
x) EXIT
Enter your choice:
Available menu options depend upon previous actions. For
example, you cannot list, modify, or remove clients until
you have added at least one DMS client. In that case, the
m, l, and r key letters are not shown in front of their
respective options: a) ADD a client
c) CONFIGURE software environments
d) DELETE software environments
i) INSTALL software environments
) LIST registered clients
) MODIFY a client
) REMOVE a client
s) SHOW software environments
x) EXIT
Base directory for Dataless Management Services Default
location of client's root directory DMS client database
file
Commands: bindconfig(8), doconfig(8), nissetup(8),
pmerge(8), setld(8)
Files: bootptab(4)
Sharing Software on a Local Area Network
Installation Guide
Installation Guide -- Advanced Topics
dmu(8)
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