[Veritas-bu] Unix backup performance...

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The network interfaces are at 100/full.  In the client properties there is a
setting for memory.  Should this be set to something other than 0?

(if you haven't guessed yet I am not a unix guy and am doing everything via
the windows console.)

_____________________________________________
From: veritas-bu-admin AT mailman.eng.auburn DOT edu@AICI On Behalf Of
"blaine_robison AT netzero DOT com" <blaine_robison AT netzero DOT com>
Sent: Tuesday, November 09, 2004 11:00 AM
To: Marx, Keath
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Unix backup performance...


Keath,
Do you have Gigabit interfaces on the Sun systems?
If you have Gigbit try these settings.
NETWORK_BUFFER_SZ 65536
tcp_xmit_hiwat 262144
tcp_recv_hiwat 262144
tcp_max_buf ( should be same size as the speed of the interface 1GB )

Refer to Sun Tuning Parameters Doc
http://docs.sun.com/db/doc/806-7009


Your Windows box has a max block size of 65536. I have seen very good
performance with LTO2 with a block size of 262144 and buffers of 32.

Something that could be affecting the backup speed, is the ratio of small
files to Filesystem size. Large amounts of small files slow everything down.

Blaine Robison
Veritas Certified Professional Data Protection
Sun Certified System Administrator
Sun Certified Network Administrator
Sun Certified Back and Recovery Engineer
_______________________________________________
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 ALIGN=3DLEFT><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">The netwo=
rk interfaces are at 100/full.&nbsp; In the client properties there is a =
setting for memory.&nbsp; Should this be set to something other than 0?</=
FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">(if you h=
aven</FONT><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">'</FONT><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">t guessed yet I am not a unix g=
uy and am doing everything via the windows console.)</FONT></P>

<P ALIGN=3DLEFT><FONT SIZE=3D2 FACE=3D"Tahoma">__________________________=
___________________<BR>
</FONT><B></B><B><FONT SIZE=3D2 FACE=3D"Tahoma">From:</FONT></B><FONT SIZ=
E=3D2 FACE=3D"Tahoma"> veritas-bu-admin AT mailman.eng.auburn DOT 
edu@AICI</FONT=
><B></B><B> <FONT SIZE=3D2 FACE=3D"Tahoma">On Behalf Of</FONT></B> <FONT =
SIZE=3D2 FACE=3D"Tahoma">&quot;blaine_robison AT netzero DOT com&quot; 
&lt;blain=
e_robison AT netzero DOT com&gt;<BR>
</FONT><B></B><B><FONT SIZE=3D2 FACE=3D"Tahoma">Sent:</FONT></B><FONT SIZ=
E=3D2 FACE=3D"Tahoma"> Tuesday, November 09, 2004 11:00 AM<BR>
</FONT><B></B><B><FONT SIZE=3D2 FACE=3D"Tahoma">To:</FONT></B><FONT SIZE=3D=
2 FACE=3D"Tahoma"> Marx, Keath<BR>
</FONT><B></B><B><FONT SIZE=3D2 FACE=3D"Tahoma">Cc:</FONT></B><FONT SIZE=3D=
2 FACE=3D"Tahoma"> veritas-bu AT mailman.eng.auburn DOT edu<BR>
</FONT><B></B><B><FONT SIZE=3D2 FACE=3D"Tahoma">Subject:</FONT></B><FONT =
SIZE=3D2 FACE=3D"Tahoma"> Re: [Veritas-bu] Unix backup performance...</FO=
NT></P>
<BR>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Keath,<=
/FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Do you =
have Gigabit interfaces on the Sun systems?</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">If you =
have Gigbit try these settings.</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">NETWORK=
_BUFFER_SZ 65536</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">tcp_xmi=
t_hiwat 262144</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">tcp_rec=
v_hiwat 262144</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">tcp_max=
_buf ( should be same size as the speed of the interface 1GB )</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Refer t=
o Sun Tuning Parameters Doc</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier"><A HREF=
=3D"http://docs.sun.com/db/doc/806-7009"; TARGET=3D"_blank">http://docs.su=
n.com/db/doc/806-7009</A></FONT></P>
<BR>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Your Wi=
ndows box has a max block size of 65536. I have seen very good performanc=
e with LTO2 with a block size of 262144 and buffers of 32.</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Somethi=
ng that could be affecting the backup speed, is the ratio of small files =
to Filesystem size. Large amounts of small files slow everything down.</F=
ONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Blaine =
Robison</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Veritas=
 Certified Professional Data Protection</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Sun Cer=
tified System Administrator</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Sun Cer=
tified Network Administrator</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Sun Cer=
tified Back and Recovery Engineer</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">_______=
________________________________________</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier">Veritas=
-bu maillist&nbsp; -&nbsp; Veritas-bu AT mailman.eng.auburn DOT edu</FONT></P>

<P ALIGN=3DLEFT><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Courier"><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></FO=
NT></P>

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