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We do both in-line copies and vault tape copies, and what we have found so
far is that the in-line certainly runs longer and quite a bit slower do to
the fact that you are pushing the same data to two different tape drives.
However, after some testing, we found that this was a far more acceptable
manner for creating offsite tapes for our larger servers (multiple volumes
in excess of 300GB). However, for our networked clients and smaller file
servers, we continue to vault tape copy during the day.
Let me warn you though, vaulting is EXTREMELY resource intensive, especially
on wintel boxes. We are running a Compaq(HP) Proliant ML 570 with Quad Xeon
700 processors and 2 GB of RAM, and the processors stay pegged at 90%+
during vaulting. I am in the process of adding more RAM to see if it makes
a difference (although I suspect it will be very minimal). If I could
choose another server for vaulting, I would consider an 8-way, and possibly
a Solaris box for the horsepower.
Greg Pearson
-----Original Message-----
From: Scott Jacobson [mailto:SJACOBSO AT novell DOT com]
Sent: Friday, April 04, 2003 10:19 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] 4.5 Vaulting In-Line Tape Copy
We are looking into this as the primary off-site/DR procedure of choice.
Can anyone speak to the "real" world usage of this process and indicate the
performance hit of the copy (two streams) vs the single stream backup
throughput?
Thanks,
Scott Jacobson
NetBackup Systems Administration
Data Retention and Storage Management
I. S. & T. Provo Operations
sjacobso AT novell DOT com <mailto:sjacobso AT novell DOT com>
Desk Direct: 801-861-7668
Toll Free: 800-453-1267 Ext. 1-7668
Cell: 801-560-6891
Novell, Inc., the leading provider of Net business solutions
www.novell.com <http://www.novell.com>
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<DIV><SPAN class=822330517-04042003>We do both in-line copies and vault tape
copies, and what we have found so far is that the in-line certainly runs longer
and quite a bit slower do to the fact that you are pushing the same data to two
different tape drives. However, after some testing, we found that this
was
a far more acceptable manner for creating offsite tapes for our larger servers
(multiple volumes in excess of 300GB). However, for our networked clients
and smaller file servers, we continue to vault tape copy during the day.
</SPAN></DIV>
<DIV><SPAN class=822330517-04042003></SPAN> </DIV>
<DIV><SPAN class=822330517-04042003>Let me warn you though, vaulting is
EXTREMELY resource intensive, especially on wintel boxes. We are running
a
Compaq(HP) Proliant ML 570 with Quad Xeon 700 processors and 2 GB of RAM, and
the processors stay pegged at 90%+ during vaulting. I am in the process
of
adding more RAM to see if it makes a difference (although I suspect it will be
very minimal). If I could choose another server for vaulting, I would
consider an 8-way, and possibly a Solaris box for the horsepower.</SPAN></DIV>
<DIV><SPAN class=822330517-04042003></SPAN> </DIV>
<DIV><SPAN class=822330517-04042003>Greg Pearson</SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B> Scott Jacobson
[mailto:SJACOBSO AT novell DOT com]<BR><B>Sent:</B> Friday, April 04, 2003
10:19
AM<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B>
[Veritas-bu] 4.5 Vaulting In-Line Tape Copy<BR><BR></FONT></DIV>
<DIV>We are looking into this as the primary off-site/DR procedure of
choice.</DIV>
<DIV> </DIV>
<DIV>Can anyone speak to the "real" world usage of this process and indicate
the performance hit of the copy (two streams) vs the single stream
backup
throughput?</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV> </DIV>
<DIV>Scott Jacobson<BR>NetBackup Systems Administration<BR>Data Retention and
Storage Management<BR>I. S. & T. Provo Operations<BR><A
href="mailto:sjacobso AT novell DOT com">sjacobso AT novell DOT
com</A><BR>Desk
Direct: 801-861-7668<BR>Toll
Free: 800-453-1267 Ext.
1-7668<BR>Cell:
801-560-6891<BR>Novell, Inc., the leading provider of Net business
solutions<BR><A
href="http://www.novell.com";>www.novell.com</A></DIV></BLOCKQUOTE></BODY></HTML>
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