IBM ZVM - FOR LINUX V6 RELEASE 1, Getting Started

Page: 89 / 172

WebSphere, for instance). Then, during the cloning process, you can select the
master prototype that meets the needs of your clone.
v
The LINUX PROTODIR consumes an entire 3390-3 volume. To help slow the
consumption of 3390-3 volumes, you can split the Linux file system into
read-only and read/write portions and share the read-only portion. You should
be familiar with Linux file system usage practices before attempting to set up
read-only portions of the file system. To do this, you need to create a master
Linux virtual server that can update the minidisk to which other Linux virtual
servers are linked in read-only mode through the LINK command or LINK
directory statement.
Note: There are important maintenance issues here: running Linux virtual
servers do not get updates to the read-only disk until those servers are
recycled. Also, a running Linux system linked to read-only disks might
crash if those disks are updated while it is running. So, you need to
develop a maintenance plan to determine how to update the read-only
disk and when to recycle Linux virtual servers.
v
If you want to see the entire user directory entry for a user, issue the following
commands:
dirm for user_id get nolock
...
RDR FILE
nnn SENT FROM DIRMAINT PUN WAS 8116 RECS 0027 CPY 001 A NOHOLD NOKEEP
...
peek nnn (for *
where user_id is the user ID you want to see and nnn is the reader spool file
identifier.
You know you are done when DirMaint tells you LINMSTR is created.
Steps for setting up LINMSTR’s disks
In this procedure, you format LINMSTR’s 191 disk and create a PROFILE EXEC.
Each clone you create gets a replica of this 191 disk.
Because the 191 disk has only five cylinders, it is too small to hold the Linux boot
files for installing the Linux operating system. It would also be a waste of disk
space to increase the size of the 191 disk to accommodate the Linux boot files,
since each clone would get the same sized disk and the clones do not need a larger
disk. Instead, this procedure has you create a 192 disk for LINMSTR only. The
larger 192 disk can hold the Linux boot files and this disk will not be replicated in
the clones.
Before you begin: You need to log on to MAINT. Later in this procedure, you
need to log onto LINMSTR.
Chapter 7. Creating your first Linux virtual machine and installing Linux
75