Veritas-bu

[Veritas-bu] media manager/storage unit assignment

2004-12-19 23:38:56
Subject: [Veritas-bu] media manager/storage unit assignment
From: Charles Ballowe <cballowe AT gmail DOT com> (Charles Ballowe)
Date: Sun, 19 Dec 2004 22:38:56 -0600
On Sun, 19 Dec 2004 20:01:40 -0600, David Rock <dave-bu AT graniteweb DOT com> 
wrote:
> * Charles Ballowe <cballowe AT gmail DOT com> [2004-12-19 15:36]:
> > I know in 3.4 storage unit assignment was alphabetical. One storage
> > unit was used until its drives were full then the next was selected.
> > Is this still the same in NBU 4.5 or 5.1? If so... can I do something
> > like -- suppose 3 media servers with 8 SSO drives named master,
> > media1, media2 - now suppose media2 has the best I/O performance so
> > i'd like it to be prefered, but would still like to balance I/O
> > between the 3 with master as the least used - can i create storage
> > units with names like:
> > 1-media2
> > 2-media1
> > 3-media2
> > 4-media1
> > 5-master
> >
> > and assign 2 drives to each storage unit, put the units in a storage
> > unit group, assign the group to backups and have the backups fairly
> > balanced between the servers? any downsides to something like this?
> > Thoughts?
> 
> In 4.5 and above, I would think that Storage Unit Groups would be the
> appropriate way to do this. The order of precedence in the STUG is based
> on which one is defined first in the group, not alphabetical, so list
> the fastest one first.
> 
But... even the fastest is best off using only 2 drives -- limited
bandwidth on the network interfaces among other things, so it's best
to assign 2 drives, then the next server, etc.

-Charlie

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