Red Hat SATELLITE 5.1.0 RELEASE NOTES Manual de instalación descargar pdf (Pagina 66)

48 The Virtualization Cookbook for Red Hat Enterprise Linux 5.2

If you do not have sufficient DASD, this number can be reduced. Having adequate paging

space will give you plenty of headroom to add more Linux virtual machines. A rule of thumb

for the amount of paging space is to have twice as much as the total of all memory for all

running Linux user IDs combined.

4.6.1 Formatting the paging volumes

Before adding paging volumes to the system, the DASD volumes to be used for minidisk

space (PERM) and paging space (PAGE) must be formatted. Normally this is done one volume at

a time using the CPFMTXA command. If you have just a few volumes, that is fine, but when you

have many volumes to format, the process of running CPFMTXA can become time-consuming

and tedious, which can lead to errors.

Therefore, a REXX EXEC named CPFORMAT is provided to allow you to format many volumes

with a single command. The source code for this EXEC is located in , “The CPFORMAT

EXEC” on page 216. It is a wrapper around CPFMTXA. To use this EXEC, each DASD to be

formatted must first be attached with the virtual device address the same real device address

(using ATTACH <realDev> *).

Getting the CPFORMAT EXEC to z/VM

Logoff from MAINT so you will be able to get the MAINT 191 disk in read-write mode using FTP.

Start an SSH (putty) session to the NFS server and change to the vm/ directory that was

created when you untarred the files associated with this book. Verify that the file

CPFORMAT.EXEC exists. Note that the directory name will be one of the following, depending on

the Linux distribution you are working with:

# cd /nfs/virt-cookbook-S10SP2/vm // if you are working with SLES 10 SP2

# cd /nfs/virt-cookbook-RH52/vm // if you are working with RHEL 5.2

# ls CPFORMAT*

CPFORMAT.EXEC

Now start an FTP session to z/VM. If you get a reply from the FTP server, it shows that you

correctly configured it on the z/VM TCPMAINT user ID. Issue the ASCII subcommand to be sure

the ASCII characters are converted to EBCDIC, and use the PUT subcommand to copy the

file.

# ftp <9.12.5.22>

Name (9.12.5.22:root): maint

331-Password: maint

230-220-FTPSERVE IBM VM Level 540 at VMLINUXA.ITSO.IBM.COM, 15:47:48 EDT TUESDAY

2008-05-13

230-MAINT logged in; working directory = MAINT 191

...

ftp> ascii

...

Note: This EXEC will label the volumes according to the convention described in 2.2.1,

“Volume labeling convention” on page 9. If you want different volume labels, you can use

the CPFMTXA command and manually specify each volume label, or you can modify the

REXX EXEC.

Important: At this point, you will need access to the NFS server described in Chapter 6,

“Configuring a Network File System server for RHEL 5.2” on page 85, in order to get the

files CPFORMAT EXEC.

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