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<div class="moz-cite-prefix">Hi Mike,<br>
<br>
What does it mean "behind a 1GB router" ? Please describe the
network topology in more detail. Is the NAS in a different subnet
than the client? What kind of router is it?<br>
<br>
What is the bandwidth utilization on the switch ports for the
client & server? Any errors reported in the switch event
log? Any errors reported in the router event log? What is the
CPU load/usage on this "1GB router"?<br>
<br>
When you un-tar the tarball from the NAS, what are you writing the
result to? Can you try writing it to /dev/null and see if it's
any faster? It would be faster if the problem was slowness in the
filesystem/device that you were writing the un-tarred files to.<br>
<br>
Jim<br>
<pre class="moz-signature" cols="72">--
Jim Ockers, P.E., P.Eng. (<a class="moz-txt-link-abbreviated" href="mailto:ockers@ockers.net">ockers@ockers.net</a>)
Contact info: <a class="moz-txt-link-freetext" href="http://www.ockers.net/">http://www.ockers.net/</a>
</pre>
On 5/3/13 1:40 PM, Mike Bean wrote:<br>
</div>
<blockquote
cite="mid:CAKuUP=eUj473k8-x62Uwgcn6xhV_b0d0-xPm2bnEDoODpwvw1Q@mail.gmail.com"
type="cite">
<div dir="ltr">Peculiar problem, haven't the slightest idea where
to start. Need advice!
<div><br>
</div>
<div style="">RHEL5.4 box with an NFS mount point to a NAS
storage device into a NAS device with jumbo frames disabled.
NAS has a samba share capability.</div>
<div style=""><br>
</div>
<div style="">Users are convinced it's too slow.</div>
<div style="">At least one user is convinced that if he uses
smbclient to untar the same tarball, it takes, 2 maybe 3
minutes.</div>
<div style="">(My manual untar attempt of the same tarball has
been running for 25 minutes and climbing.)</div>
<div style=""><br>
</div>
<div style="">NAS is in a one-volume raid 6 - seven drives.
Users not showing much interest in splitting it into multiple
volumes.</div>
<div style=""><br>
</div>
<div style="">Network guys are convinced the slowness is because
it's behind a 1GB router;</div>
<div style="">Not seeing anything that really worries me in
/var/log/messages</div>
<div style="">Not seeing any unusual processes in top</div>
<div style="">memory use isn't excessive - not swapping</div>
<div style=""><br>
</div>
<div style="">
network mtu is at 1500 - wouldn't matter, since our switch
ports are at 1500 anyway,</div>
<div style=""><br>
</div>
<div style="">My own search attempts coming up dry. Just
vaguely related academic material that doesn't even give me a
good idea where to start!</div>
<div style=""><br>
</div>
<div style="">I approach the oracle!</div>
<div style=""><br>
</div>
<div style="">Mike</div>
</div>
<br>
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<br>
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</blockquote>
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