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

Enterprise Volume Manager (Multi-OS) Network Administration Guide 9–9
EVM Jobs and Job Management
Running several EVM jobs at the same time also creates the possibility of more than
one job trying to use the same resource. Such conflicts should be rare in environments
that have ample available storage resources. The best way to prevent the possibility of
a job resource conflict is to make sure that jobs running simultaneously use storage
resources located on different storage systems.
Job Naming Conventions
EVM V2.0D job names are not case sensitive; “EVMJOB1” and “evmjob1” are the
same name.
EVM job definitions are stored as files, using the name of the job as the filename.
Using certain characters in the job name (and hence the file name) can cause problems
with the EVM Job Status page and the EVM Log Reporting page.
To prevent these problems, use only alphanumeric characters in the job name.
Underscore (_) and dash (-) characters are safe to use in EVM job names.
NOTE: The online Help/User Guide includes a topic on illegal characters in the Troubleshooting
section.
Aborting EVM Jobs
The EVM Abort command stops a currently running job at the beginning of the next
operational step. The Abort function always waits for the current step to complete
before stopping the job. This waiting period ensures that the corresponding “undo job”
functionality can return the storage and host configuration to the pre-job state. This
waiting period can be inconvenient, however, if the job is aborted during a normalize
step, which can take a considerable amount of time to complete.
Continuing EVM Jobs
The EVM continue command restarts a job that has been stopped by a pause
operation. The job is restarted at the step following the pause step. The continue
command has no effect on a job that is not paused. If you decide not to continue past a
pause step, you must first abort the job and then undo it; this is required to re-enable
other job commands.
Validating EVM Jobs
The purpose of the EVM Validate command is to provide a reasonable degree of
confidence that the job in question will run successfully. This degree of confidence is
based on the storage and host configurations that exist at the time the validation is