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[Veritas-bu] Multiple processors, compression in NetBackup
2002-03-28 17:57:09
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If you turned on compression as part of the NB class setup, the additional
processors would have to go in the client. It's a client-side compression.
Usually not recommended unless bandwidth is a problem because it chews so
hard on the client's CPU's.
If you turned on compression on the tape drive, it's usually performed in
the drive's hardware and there should be no benefit to adding processors to
your media server.
Your symptoms look like you turned on class compresssion, ie client-side
compression. Compressing at the drive and at the client can be time & space
consuming to no benefit (or worse, actually increase tape usage).
-Mark
-----Original Message-----
From: Gardner, Jesse [mailto:Jesse.Gardner AT storaenso DOT com]
Sent: Thursday, March 28, 2002 3:13 PM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] Multiple processors, compression in NetBackup
In preliminary testing of our new NetBackup configuration, we ran a class
with and without compression. Using compression doubled the time it took
the class to finish.
The class consists of one client, specifying about 34GB of software
installation files and hardware drivers to be backed up. The client is
connected to the media server via TCP/IP ethernet. The media server is a
dual Xeon 333 with 500mb RAM running Windows 2000, connected via fabric SAN
switch to an HP Surestore-E library.
Now for the question: Would adding more processors to the media server
speed up the compression considerably? (or, possibly, is the compression
done at the client?)
If we should add more processors to the media server, are they automatically
detected and used by Netbackup 3.4.1, or is there extra configuration there?
Thanks!
Jesse
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<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff size=2>If
you
turned on compression as part of the NB class setup, the additional processors
would have to go in the client. It's a client-side compression.
Usually not recommended unless bandwidth is a problem because it chews so hard
on the client's CPU's.</FONT></SPAN></DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff size=2>If
you
turned on compression on the tape drive, it's usually performed in the drive's
hardware and there should be no benefit to adding processors to your media
server.</FONT></SPAN></DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff size=2>Your
symptoms look like you turned on class compresssion, ie client-side
compression. Compressing at the drive and at the client can be time &
space consuming to no benefit (or worse, actually increase tape
usage).</FONT></SPAN></DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=849205322-28032002><FONT face=Arial color=#0000ff
size=2>-Mark</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> Gardner, Jesse
[mailto:Jesse.Gardner AT storaenso DOT com]<BR><B>Sent:</B> Thursday, March
28, 2002
3:13 PM<BR><B>To:</B> 'veritas-bu AT mailman.eng.auburn DOT
edu'<BR><B>Subject:</B>
[Veritas-bu] Multiple processors, compression in
NetBackup<BR><BR></FONT></DIV>
<P><FONT face=Verdana color=#000000>In preliminary testing of our new
NetBackup configuration, we ran a class with and without compression.
Using compression doubled the time it took the class to finish.</FONT></P>
<P><FONT face=Verdana color=#000000>The class consists of one client,
specifying about 34GB of software installation files and hardware drivers to
be backed up. The client is connected to the media server via TCP/IP
ethernet. The media server is a dual Xeon 333 with 500mb RAM running
Windows 2000, connected via fabric SAN switch to an HP Surestore-E
library.</FONT></P>
<P><FONT face=Verdana color=#000000>Now for the question: Would adding
more processors to the media server speed up the compression
considerably? (or, possibly, is the compression done at the
client?)</FONT></P>
<P><FONT face=Verdana color=#000000>If we should add more processors to the
media server, are they automatically detected and used by Netbackup 3.4.1, or
is there extra configuration there?</FONT></P>
<P><FONT face=Verdana color=#000000>Thanks!</FONT> <BR><FONT face=Verdana
color=#000000>Jesse</FONT> </P></BLOCKQUOTE></BODY></HTML>
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