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In a Paritioned Library,how many servers (master/media) can become Robotic control hosts ?

Created: 27 Apr 2014 • Updated: 03 Sep 2014 | 9 comments
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Marianne's picture

One per partition.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

nbuno's picture

OK..lets talk at h/w level....since Robot would be just one for n number of partitions..How would it handle the commands issued to it if simultaneously ? Say every Partition's robot control host want to run Robtet..then how ?

Michael G Andersen's picture

In there robots I have worked with each partition needed to have it's own control path(s)

e.g.

partion Production was controlled through tape drive 1 & 4 connections

partion Test was controlled through tape drive 8 connection

where the partitions had tape drives 1-7 & 8 each

mph999's picture

The robot just deals with each request as they come in.

If for example you had x3 logical partitions, and you started a multiple backups that required say x2 tapes to be loaded per partiotion, the library would just queue the requests and deal with one after the other.

NBU has no control of this, once the requests yto load tapes are sent it just waits for the requests to be completed - ok there are timeouts, but unless there are issues then the library should be able to complete the requests in plenty of time.

 

 

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Marianne's picture

You may need to read your library documentation for more info.
As far as NBU and OS is concerned, these are totally separate robots.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

SOLUTION
huanglao2002's picture

In our environment,we have a Oracle SL 3000 PTL, we have two logical partitions. Each of the partion join different backup domain. So i think each partion only need one Robotic control host,but a lot of media server can use it.

mph999's picture

No, if there are 2 logical partitions, as far as any backup software is concerned, there are two separate libraries.  Therefore you could have two robot control hosts.

The fact there is only '1' physical library is not important, the library firmware makes it look like there are 2, and so that it what NBU sees.

 

 

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
mph999's picture

Yes, multiple media servers can 'use' the robot because media server communicates to the robot control host to request robot operations.

 

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Marianne's picture

This query was answered 4 weeks ago.

Time to close discussion.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links