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To me, volume groups are all about location. Volume pool are all about
content.
Every physical location, library, shelf, offsite, etc., has two volume
groups, one for LTO1 & the other for LTO2 (for whatever annoying reason,
tapes within a single VG must be the same type).
Volume pools are about what data goes on the tape. Oracle data goes to one
pool, Filer data to another, NT, Unix FS, etc.
Now - for offsite purposes, I create two tapes, one for onsite and the other
for offsite. The onsite & offsite backups are written to two different tape
pools. This makes the tapes that need to go offsite easy to identify. I
eject the tapes in the offsite pool (where there belong to the VG for the
library) and send them offsite. My offsite process changes the Volume Group
from "Library-hcart2" to "Offsite-hcart2". The pool remains unchanged
(couldn't change it if you wanted - NB fixes the pool until the tape is
empty).
I set the return date of the tape at the same time - the same as the
retention period. When the tape is returned, it's fully expired of images &
I just stuff it back in the library. We have the good luck to keep all the
blank media in-library. If it wasn't, though, if you're volume groups are
accurate (and I have a gizmo to find discrepencies) then your
out-of-library-but-still-blank media is fairly easy to find - just find
tapes in the Scratch pool (or who are unassigned) and in the "Shelf" volume
group & inject them as needed.
HTH - M
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Martin,
Jonathan (Contractor)
Sent: Thursday, December 15, 2005 12:23 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Volume Pools
I'm working on a transition on some of our sites from Backup Exec to
Netbackup and I'm wondering about their use of Volume Pools. One of our
sites uses volume pools as "buckets" for tapes they take offsite. Aka... a
3_mo_offsite VP and a 1_yr_offsite VP. Still others use the defaults... or
some make up their own. The problem I am finding is that you constantly
have to track which media needs to be reloaded or make sure you have a boat
load of scratch media available just incase. Any better ideas on volume
pools / how do you guys use them effectively?
-Jonathan
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<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff size=2>To
me,
volume groups are all about location. Volume pool are all about
content.</FONT></SPAN></DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff size=2>Every
physical location, library, shelf, offsite, etc., has two volume groups, one
for
LTO1 & the other for LTO2 (for whatever annoying reason, tapes within a
single VG must be the same type). </FONT></SPAN></DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2>Volume
pools are about what data goes on the tape. Oracle data goes to one pool,
Filer data to another, NT, Unix FS, etc.</FONT></SPAN></DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff size=2>Now -
for offsite purposes, I create two tapes, one for onsite and the other for
offsite. The onsite & offsite backups are written to two different
tape pools. This makes the tapes that need to go offsite easy to
identify. I eject the tapes in the offsite pool (where there belong
to the VG for the library) and send them offsite. My offsite process
changes the Volume Group from "Library-hcart2" to "Offsite-hcart2". The
pool remains unchanged (couldn't change it if you wanted - NB fixes the pool
until the tape is empty).</FONT></SPAN></DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff size=2>I set
the return date of the tape at the same time - the same as the retention
period. When the tape is returned, it's fully expired of images & I
just stuff it back in the library. We have the good luck to keep all the
blank media in-library. If it wasn't, though, if you're volume groups are
accurate (and I have a gizmo to find discrepencies) then your
out-of-library-but-still-blank media is fairly easy to find - just find tapes
in
the Scratch pool (or who are unassigned) and in the "Shelf" volume group &
inject them as needed.</FONT></SPAN></DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=562341520-15122005><FONT face=Arial color=#0000ff size=2>HTH -
M</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]<B>On Behalf Of
</B>Martin,
Jonathan (Contractor)<BR><B>Sent:</B> Thursday, December 15, 2005 12:23
PM<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B>
[Veritas-bu] Volume Pools<BR><BR></FONT></DIV>
<DIV><SPAN class=220362019-15122005><FONT face=Arial size=2>I'm working on a
transition on some of our sites from Backup Exec to Netbackup and I'm
wondering about their use of Volume Pools. One of our sites uses volume
pools as "buckets" for tapes they take offsite. Aka... a 3_mo_offsite
VP
and a 1_yr_offsite VP. Still others use the defaults... or some make up
their own. The problem I am finding is that you constantly have to
track
which media needs to be reloaded or make sure you have a boat load of scratch
media available just incase. Any better ideas on volume pools / how do
you guys use them effectively?</FONT></SPAN></DIV>
<DIV><SPAN class=220362019-15122005><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=220362019-15122005><FONT face=Arial
size=2>-Jonathan</FONT></SPAN></DIV></BLOCKQUOTE></BODY></HTML>
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