[Veritas-bu] Network buffer size

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See this technote:

http://seer.support.veritas.com/docs/183702.htm

I've had good luck with 128K buffers against DLT and we've got 256K buffers
on an LTO.  You may have to alter your /etc/system settings to set enough
shared memory for these buffes. The technote has the calculations.  

-M

-----Original Message-----
From: Kramer, Dale [mailto:Dale_Kramer AT steris DOT com]
Sent: Friday, September 06, 2002 8:55 AM
To: Veritas Users NetBackup (E-mail)
Subject: [Veritas-bu] Network buffer size


Hi,

Netbackup datacenter 3.4.2 on Solaris machines.

We have a node on a SunFire 6800 backing up to a Sun 6000 media server over
gigabit ethernet.  All of a sudden the backup speed dropped in half.  I
noticed in the bpbkar on the client it had a line:

Setting network send buffer size to 32032 bytes

Don't see this in other bpbkar log files on other equipment.  I doubt this
is the problem but curious what it might be and is that correct when going
over gigabit ethernet.

thanx,

Dale P. Kramer
Senior Enterprise Systems Analyst
STERIS Corporation
5960 Heisley Rd.
Mentor, OH 44060
440-392-7082

Today's mighty oak is just yesterday's nut that held it's ground.


_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

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<P><FONT SIZE=3D2>See this technote:</FONT>
</P>

<P><FONT SIZE=3D2><A =
HREF=3D"http://seer.support.veritas.com/docs/183702.htm"; =
TARGET=3D"_blank">http://seer.support.veritas.com/docs/183702.htm</A></F=
ONT>
</P>

<P><FONT SIZE=3D2>I've had good luck with 128K buffers against DLT and =
we've got 256K buffers on an LTO.&nbsp; You may have to alter your =
/etc/system settings to set enough shared memory for these buffes. The =
technote has the calculations.&nbsp; </FONT></P>

<P><FONT SIZE=3D2>-M</FONT>
</P>

<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Kramer, Dale [<A =
HREF=3D"mailto:Dale_Kramer AT steris DOT com">mailto:Dale_Kramer AT steris DOT 
com</A>=
]</FONT>
<BR><FONT SIZE=3D2>Sent: Friday, September 06, 2002 8:55 AM</FONT>
<BR><FONT SIZE=3D2>To: Veritas Users NetBackup (E-mail)</FONT>
<BR><FONT SIZE=3D2>Subject: [Veritas-bu] Network buffer size</FONT>
</P>
<BR>

<P><FONT SIZE=3D2>Hi,</FONT>
</P>

<P><FONT SIZE=3D2>Netbackup datacenter 3.4.2 on Solaris =
machines.</FONT>
</P>

<P><FONT SIZE=3D2>We have a node on a SunFire 6800 backing up to a Sun =
6000 media server over gigabit ethernet.&nbsp; All of a sudden the =
backup speed dropped in half.&nbsp; I noticed in the bpbkar on the =
client it had a line:</FONT></P>

<P><FONT SIZE=3D2>Setting network send buffer size to 32032 =
bytes</FONT>
</P>

<P><FONT SIZE=3D2>Don't see this in other bpbkar log files on other =
equipment.&nbsp; I doubt this is the problem but curious what it might =
be and is that correct when going over gigabit ethernet.</FONT></P>

<P><FONT SIZE=3D2>thanx,</FONT>
</P>

<P><FONT SIZE=3D2>Dale P. Kramer</FONT>
<BR><FONT SIZE=3D2>Senior Enterprise Systems Analyst</FONT>
<BR><FONT SIZE=3D2>STERIS Corporation</FONT>
<BR><FONT SIZE=3D2>5960 Heisley Rd.</FONT>
<BR><FONT SIZE=3D2>Mentor, OH 44060</FONT>
<BR><FONT SIZE=3D2>440-392-7082</FONT>
</P>

<P><FONT SIZE=3D2>Today's mighty oak is just yesterday's nut that held =
it's ground.</FONT>
</P>
<BR>

<P><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>Veritas-bu maillist&nbsp; -&nbsp; =
Veritas-bu AT mailman.eng.auburn DOT edu</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>
</P>

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