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

9–6 Enterprise Volume Manager (Multi-OS) Network Administration Guide
EVM Jobs and Job Management
RESUME NOWAIT dbserver thaw.sh
MOUNT VOLUME $BCV1 backupserver /mnt/lv00-bcv
LAUNCH WAIT backupserver backup.sh
Each operation is explained in the operation sections that follow.
Snapshot Operations
The following snapshot operations are applicable in both Windows and UNIX
environments.
Suspend Operation
The suspend operation invokes an application-specific agent or utility on an EVM host
agent computer that places an application (typically a database) in the appropriate
state for volume replication. The methods invoked vary depending on the application.
Refer to the appropriate application-specific EVM white paper for details.
In the Windows Snapshot Unit Example on page 9–5, the batch file named freeze.bat
executes on the “dbserver” host, using the
WAIT parameter.
In the UNIX Snapshot Volume Example on page 9–5, the script named freeze.sh
executes on the “dbserver” host, using the
WAIT parameter.
Snap Unit Operation
The snap operation creates the snapshot. In the Windows Snapshot Unit Example on
page 9–5, snapshots are being created of unit D1 on SUBSYS1 and D1 on SUBSYS2.
The $<name> variable allows EVM to choose the unit number for the snapshot.
Snap Volume Operation
In the UNIX Snapshot Volume Example on page 9–5, the snap operation creates the
necessary snapshots. The $<name> variable allows EVM to automatically choose
the appropriate volume numbers for the snapshot.
Resume Operation
The resume operation is the inverse of the suspend operation. Resume returns the
application on the EVM host agent computer to the normal mode of operation.
Mount Unit Operation
After creating the BCVs and restoring the application on the EVM host agent
computer to the normal mode of operation, the next step is to mount the BCVs on an
EVM host agent computer.