Red Hat SATELLITE 5.1.0 RELEASE NOTES Instrukcja Instalacji Pobierz pdf (Strona 60)

42 The Virtualization Cookbook for Red Hat Enterprise Linux 5.2

4.4 Customizing the SYSTEM CONFIG file

The first configuration file read when z/VM IPLs is the SYSTEM CONFIG file. The following

changes are recommended:

򐂰 Change the system name.

򐂰 Increase retrieve key capacity.

򐂰 Allow virtual disks (VDISKs) to be created.

򐂰 Turn off the Disconnect Timeout. This will prevent idle disconnected users from being

forced off the system.

򐂰 Define a virtual switch (VSWITCH) that will be used for Linux networking.

To make these changes, perform the following steps:

1. To edit the SYSTEM CONFIG file, the MAINT CF1 minidisk must be released as a CP disk

using the CPRELASE command. The CP disks are queried using the QUERY CPDISK command.

Note the MAINT CF1 disk is accessed as CP disk A before it is released, but not after.

==> q cpdisk

Label Userid Vdev Mode Stat Vol-ID Rdev Type StartLoc EndLoc

MNTCF1 MAINT 0CF1 A R/O 540RES D850 CKD 39 158

MNTCF2 MAINT 0CF2 B R/O 540RES D850 CKD 159 278

MNTCF3 MAINT 0CF3 C R/O 540RES D850 CKD 279 398

==> cprel a

CPRELEASE request for disk A scheduled.

HCPZAC6730I CPRELEASE request for disk A completed.

==> q cpdisk

Label Userid Vdev Mode Stat Vol-ID Rdev Type StartLoc EndLoc

MNTCF2 MAINT 0CF2 B R/O 540RES D850 CKD 159 278

MNTCF3 MAINT 0CF3 C R/O 540RES D850 CKD 279 398

2. After it is released, you are able to access the MAINT CF1 disk read-write. Use the LINK

command with multi-read (MR) parameter and ACCESS command to get read-write access

as your F disk.

==> link * cf1 cf1 mr

==> acc cf1 f

3. Make a backup copy of the vanilla SYSTEM CONFIG file using the COPYFILE command with the

OLDDATE parameter so that the time stamp of the file is not modified. Note that because the

target file name (system) and mode (f) are the same, the equal sign (=) can be used as a

wildcard.

==> copy system config f = conforig = (oldd

4. Edit the original file:

==> x system config f

5. The system name is set to ZVMV5R40 by default in the System_Identifier_Default

statement. You can search for it using the / subcommand:

====> /System_Identifier_D

Modify this to the new name of your system. In this example, VMLINUXA is used.

System_Identifier_Default <VMLINUXA>

6. Next look for the Features statement. You can search for it again or you can use F8 to page

down. The following changes and additions are recommended:

– Increase the number of commands that can be retrieved from 20 to 99.

– Set the Disconnect_Timeout to off so disconnected users do not get forced off.

– Allow unlimited VDISKs to be created by users by changing Userlim to infinite and

by adding the Syslim infinite clause, as shown here:

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 267 268

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