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Don't use the Netbackup client compression. It's software based and causes
a high client load, slowing the backups. Your LTO drive is capable of
hardware compression, use that.
LTO is good for about 15 MB/sec native, perhaps 25-30MB streaming rates if
you can get the data to it fast enough & the data is decently compressible.
So 74G at 15 MB/sec is only 84 minutes so you're really underperforming.
Check your buffer sizes. For my LTO drives, I'm using 256K buffers & it
makes a big performance difference. Check this whitepaper for a description
buffer sizes & counts. Make sure to set the buffers for both client & media
server. http://seer.support.veritas.com/docs/183702.htm If your system is
Windows, check out this instead:
http://seer.support.veritas.com/docs/244652.htm
Also consider the path from client to media server. If it's standard
ethernet, it's only capable of about 10MB/sec, and your drive will be
underutilized. Consider Gigabit ethernet if possible.
That should be enough to start with - post back any results you get.
-M
-----Original Message-----
From: Feroz F. Basir [mailto:dbase77 AT yahoo DOT com]
Sent: Thursday, March 13, 2003 9:54 AM
To: Donaldson, Mark; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] 2 tape drives issue
Hi,
LTO drive.
regards,
feroz
--- "Donaldson, Mark"
<Mark.Donaldson AT experianems DOT com> wrote: > What kind of
drive (DLT, LTO, etc.) in the L25?
> -M
>
> -----Original Message-----
> From: Feroz F. Basir [mailto:dbase77 AT yahoo DOT com]
> Sent: Thursday, March 13, 2003 4:15 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] 2 tape drives issue
>
>
> Hi,
>
> Thank you to all who replied to my problem. I got it
> to work to use both tape drives at the same time
> using
> 2 different policies.
>
> Backup took about 5 hrs to finish for 74 GB data on
> 1
> tape. I wonder myself if I can improve the time
> here.
> I only backup oracle data files. Plus select to
> compress. Is this normal behaviour. I'm using NB 4.5
> business server on SUN storedge L25 tape library
> with
> 2 drives.
>
> Thank you again.
>
> regards,
> feroz
>
> __________________________________________________
> Do You Yahoo!?
> Everything you'll ever need on one web page
> from News and Sport to Email and Music Charts
> http://uk.my.yahoo.com
> _______________________________________________
> Veritas-bu maillist -
> Veritas-bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
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5.5.2653.12">
<TITLE>RE: [Veritas-bu] 2 tape drives issue</TITLE>
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<BODY>
<P><FONT SIZE=3D2>Don't use the Netbackup client compression. =
It's software based and causes a high client load, slowing the =
backups. Your LTO drive is capable of hardware compression, use =
that.</FONT></P>
<P><FONT SIZE=3D2>LTO is good for about 15 MB/sec native, perhaps =
25-30MB streaming rates if you can get the data to it fast enough & =
the data is decently compressible. So 74G at 15 MB/sec is only 84 =
minutes so you're really underperforming. </FONT></P>
<P><FONT SIZE=3D2>Check your buffer sizes. For my LTO drives, I'm =
using 256K buffers & it makes a big performance difference. =
Check this whitepaper for a description buffer sizes & =
counts. Make sure to set the buffers for both client & media =
server. <A =
HREF=3D"http://seer.support.veritas.com/docs/183702.htm"; =
TARGET=3D"_blank">http://seer.support.veritas.com/docs/183702.htm</A>&nb=
sp; If your system is Windows, check out this instead: <A =
HREF=3D"http://seer.support.veritas.com/docs/244652.htm"; =
TARGET=3D"_blank">http://seer.support.veritas.com/docs/244652.htm</A></F=
ONT></P>
<P><FONT SIZE=3D2>Also consider the path from client to media =
server. If it's standard ethernet, it's only capable of about =
10MB/sec, and your drive will be underutilized. Consider Gigabit =
ethernet if possible.</FONT></P>
<P><FONT SIZE=3D2>That should be enough to start with - post back any =
results you get.</FONT>
<BR><FONT SIZE=3D2>-M</FONT>
</P>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Feroz F. Basir [<A =
HREF=3D"mailto:dbase77 AT yahoo DOT com">mailto:dbase77 AT yahoo DOT
com</A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Thursday, March 13, 2003 9:54 AM</FONT>
<BR><FONT SIZE=3D2>To: Donaldson, Mark; =
veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>Subject: RE: [Veritas-bu] 2 tape drives issue</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Hi,</FONT>
</P>
<P><FONT SIZE=3D2>LTO drive.</FONT>
</P>
<P><FONT SIZE=3D2>regards,</FONT>
<BR><FONT SIZE=3D2>feroz</FONT>
</P>
<P><FONT SIZE=3D2> --- "Donaldson, Mark"</FONT>
<BR><FONT SIZE=3D2><Mark.Donaldson AT experianems DOT com> wrote: > =
What kind of</FONT>
<BR><FONT SIZE=3D2>drive (DLT, LTO, etc.) in the L25?</FONT>
<BR><FONT SIZE=3D2>> -M</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> -----Original Message-----</FONT>
<BR><FONT SIZE=3D2>> From: Feroz F. Basir [<A =
HREF=3D"mailto:dbase77 AT yahoo DOT com">mailto:dbase77 AT yahoo DOT
com</A>]</FONT>
<BR><FONT SIZE=3D2>> Sent: Thursday, March 13, 2003 4:15 AM</FONT>
<BR><FONT SIZE=3D2>> To: veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>> Subject: RE: [Veritas-bu] 2 tape drives =
issue</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Hi,</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Thank you to all who replied to my problem. I =
got it</FONT>
<BR><FONT SIZE=3D2>> to work to use both tape drives at the same =
time</FONT>
<BR><FONT SIZE=3D2>> using</FONT>
<BR><FONT SIZE=3D2>> 2 different policies. </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Backup took about 5 hrs to finish for 74 GB =
data on</FONT>
<BR><FONT SIZE=3D2>> 1</FONT>
<BR><FONT SIZE=3D2>> tape. I wonder myself if I can improve the =
time</FONT>
<BR><FONT SIZE=3D2>> here.</FONT>
<BR><FONT SIZE=3D2>> I only backup oracle data files. Plus select =
to</FONT>
<BR><FONT SIZE=3D2>> compress. Is this normal behaviour. I'm using =
NB 4.5</FONT>
<BR><FONT SIZE=3D2>> business server on SUN storedge L25 tape =
library</FONT>
<BR><FONT SIZE=3D2>> with</FONT>
<BR><FONT SIZE=3D2>> 2 drives.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Thank you again.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> regards,</FONT>
<BR><FONT SIZE=3D2>> feroz</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
__________________________________________________</FONT>
<BR><FONT SIZE=3D2>> Do You Yahoo!?</FONT>
<BR><FONT SIZE=3D2>> Everything you'll ever need on one web =
page</FONT>
<BR><FONT SIZE=3D2>> from News and Sport to Email and Music =
Charts</FONT>
<BR><FONT SIZE=3D2>> <A HREF=3D"http://uk.my.yahoo.com"; =
TARGET=3D"_blank">http://uk.my.yahoo.com</A></FONT>
<BR><FONT SIZE=3D2>> =
_______________________________________________</FONT>
<BR><FONT SIZE=3D2>> Veritas-bu maillist - </FONT>
<BR><FONT SIZE=3D2>> Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>></FONT>
<BR><FONT SIZE=3D2><A =
HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
-bu</A></FONT>
<BR><FONT SIZE=3D2>> </FONT>
</P>
<P><FONT =
SIZE=3D2>__________________________________________________</FONT>
<BR><FONT SIZE=3D2>Do You Yahoo!?</FONT>
<BR><FONT SIZE=3D2>Everything you'll ever need on one web page</FONT>
<BR><FONT SIZE=3D2>from News and Sport to Email and Music Charts</FONT>
<BR><FONT SIZE=3D2><A HREF=3D"http://uk.my.yahoo.com"; =
TARGET=3D"_blank">http://uk.my.yahoo.com</A></FONT>
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