[OpenAFS] Re: Fwd: Re: vos move slowness remedies?
Dan Pritts
danno@internet2.edu
Tue, 26 Oct 2010 16:26:01 -0400
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On Oct 26, 2010, at 1:56 PM, Eric Chris Garrison wrote:
>=20
> [root@rfs4 ~]# dumpcap -w /tmp/ecg1.dumpcap -a duration:60
> File: /tmp/ecg1.dumpcap
> Packets: 201081 Packets dropped: 28064
> So, nothing dropped for a straight iperf test at almost full =
bandwidth,
> but over 10% dropped at 30Mb/sec for AFS vos moves.
If you are getting the "10% dropped" number from your wireshark output, =
it is a red herring. That is telling you how many packets the kernel =
was unable to copy to wireshark, not anything about what goes on on =
your network.
danno
--
Dan Pritts, Sr. Systems Engineer
Internet2
office: +1-734-352-4953 | mobile: +1-734-834-7224
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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><br><div><div>On Oct 26, 2010, at 1:56 PM, Eric Chris Garrison =
wrote:</div><blockquote type=3D"cite"><div><font =
class=3D"Apple-style-span" color=3D"#000000"><br></font>[root@rfs4 ~]# =
dumpcap -w /tmp/ecg1.dumpcap -a duration:60<br>File: =
/tmp/ecg1.dumpcap<br>Packets: 201081 Packets dropped: =
28064<br></div></blockquote><br><blockquote type=3D"cite"><div>So, =
nothing dropped for a straight iperf test at almost full =
bandwidth,<br>but over 10% dropped at 30Mb/sec for AFS vos =
moves.<br></div></blockquote></div><div><br></div><div>If you are =
getting the "10% dropped" number from your wireshark output, it is a red =
herring. That is telling you how many packets the kernel was =
unable to copy to wireshark, not anything about what goes on on =
your network.</div><div><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: 2; =
text-align: auto; text-indent: 0px; text-transform: none; white-space: =
normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: =
0px; -webkit-border-vertical-spacing: 0px; =
-webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><br =
class=3D"Apple-interchange-newline">danno<div>--</div><div><div>Dan =
Pritts, Sr. Systems Engineer</div><div>Internet2</div><div>office: =
+1-734-352-4953 | mobile: +1-734-834-7224</div></div></span>
</div>
<br></body></html>=
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