Legato NetWorker ClientPak and Storage Node Installation Guide

25
Chapter 3: Configuration
3
Backing Up Multiple Save Paths in Parallel
A new feature of the NetWorker ClientPak for MPE/iX allows you to back up multiple
save paths in parallel. The actual number is limited by the "parallelism" value assigned
to the parallelism attribute for MPE client configuration on the NetWorker server.
The default setting for the parallel attribute is 4 parallel backups. The number of
parallel backups is also limited by other clients competing for the NetWorker server’s
resources at the time of the backup. Powerful client hosts should be able to run several
scheduled backup processes concurrently.
Setting the parallelism attribute to “1” turns parallelism off. You can also turn off
parallelism using a new system variable. See “Turning Off Parallel Backups” on page
28 for information on this new system variable.
Determining What Server-Initiated Saves Will Run
The SAVEFS program determines what server-initiated saves will run. You can probe
the server from your MPE client with the SAVEFS program, as in the following
example:
:
RUN SAVEFS;INFO="-p -s
jupiter "
type: NSR client description;
pools supported: Yes;
remote user: MANAGER.SYS;
client OS type: HpMPEOS;
IP address: 137.69.101.27;
NetWorker version: dev;
OS: MPE/iX C.55.00;
version: dev;
save set: path=/PROJ_VOLUME_SET, level=full, diskno=1,
max_sessions=1,
stype=save,\
path=/MPEXL_SYSTEM_VOLUME_SET, level=full, diskno=0,
max_sessions=1,
stype=save,\
path=/, level=full, diskno=0, max_sessions=1, stype=save,\
The SAVEFS program always computes the correct maximal parallelism schedule
when all save paths are volume set names.
You can set the parallelism attribute to a lower value through the “parallelism”
attribute on the NetWorker server. You can also set the system variable
NSR_MPE_SCHED_SAVES_PARALLELISM_OFF on the MPE/iX client to completely
turn off any parallelism.