Enterprise Volume Manager (Multi-OS) Version 2.0D Network Administration Guide

Enterprise Volume Manager (Multi-OS) Network Administration Guide 9–3
EVM Jobs and Job Management
UNIX Clone Example
The following example illustrates the use of volume commands for a typical
UNIX-based clone job:
CLONE VOLUME dbserver /mnt/lv00 2
NORMALIZE VOLUME dbserver /mnt/lv00
SUSPEND WAIT dbserver freeze_db.sh
SPLIT VOLUME dbserver /mnt/lv00 $BCV1
RESUME NOWAIT dbserver thaw_db.sh
MOUNT VOLUME $BCV1 backupserver 1 /mnt/lv00-bcv
LAUNCH WAIT backupserver backup_db.sh
Each operation is explained in the operation sections that follow.
Clone Operations
The following clone operations are applicable in both Windows and UNIX
environments.
Clone Unit Operation
The first step in a clone job is to select the necessary disks and attach them to the
specified source units to begin the process of normalization. In the Windows Clone
Example on page 9–2, the clone operation starts on units D1, D2, and D3 on
SUBSYS1, using a minimum redundancy value of 2 members.
Clone Volume Operation
The first step in a clone job is to select the necessary disks and attach them to the
specified source units to begin the process of normalization.
In the UNIX Clone Example on page 9–3, the clone operation is started on logical
volume /mnt/lv00, using a minimum redundancy value of 2 members. This starts the
process of cloning all of the physical volumes that make up the volume group or
domain that the mount point is based on.
Normalize Unit Operation
The normalize operation checks the status of the clone copy process and waits until
normalization is complete on all clones before starting the next step. Although clone
normalization occurs in parallel (all clones normalize simultaneously), normalize
functions must be specified for each clone to make sure that all clones are completely
normalized before the next operation starts.