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[Veritas-bu] How to troubleshoot slow restore
2004-10-27 11:04:38
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Subject: |
[Veritas-bu] How to troubleshoot slow restore |
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From: |
kevin.denton AT eds DOT com (Denton, Kevin M) |
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Date: |
Wed, 27 Oct 2004 10:04:38 -0500 |
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Hello folks,
We're trying to figure out why a restore is running at about 50KB/s as
apposed to the normal 5-8MB/s we are used to seeing.
The restore is from one image on one tape.
We are in a Sun environment, using an STK L700 with DLT7000 drives.
We use a multiplex setting of 3 on this robot.
There is no other activity besides this one restore on the media server or
the client being restored to.
No iowait on either system.
CPU utilization is hardly being touched on either system.
No network collisions. Both servers are set to 100 Full.
We have no idea why this restore is so SLOW.
Any helpful hints for what to check?
Thanks,
Kevin Denton
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<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>Hello
folks,</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>We're
trying to figure out why a restore is running at about 50KB/s as apposed
to
the normal 5-8MB/s we are used to seeing.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004></SPAN><SPAN class=979225514-27102004><FONT
face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>The
restore is from one image on one tape.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><SPAN class=979225514-27102004><FONT
face=Arial color=#0000ff size=2>We are in a Sun environment, using an STK L700
with DLT7000 drives.</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>We
use
a multiplex setting of 3 on this robot.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>There
is no other activity besides this one restore on the media server or the
client being restored to.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>No
iowait on either system.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>CPU
utilization is hardly being touched on either system.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>No
network collisions. Both servers are set to 100 Full.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>We
have no idea why this restore is so SLOW.</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>Any
helpful hints for what to check?</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2>Thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=979225514-27102004><FONT face=Arial color=#0000ff size=2>Kevin
Denton</FONT></SPAN></DIV></BODY></HTML>
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