[OpenAFS] Disk cache not updating
Brian Huntley
bhuntley@clarkson.edu
Mon, 10 Jan 2005 11:03:53 -0500
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Thanks for your reply... I have UDP 1024-2048 and 7000-7009 open... did I
miss any?
-b
--
Brian T. Huntley, Manager of Network Operations
Office of Information Technology
Clarkson University
bhuntley@clarkson.edu -- 315.268.6723
"UNIX *is* user friendly. It's just selective about who its friends are."
Robert Banz <banz@umbc.edu>
01/10/2005 10:49 AM
To
Brian Huntley <bhuntley@clarkson.edu>
cc
Subject
Re: [OpenAFS] Disk cache not updating
Brian Huntley wrote:
>
> Hello everyone...
>
> I can't seem to find anything on this particular type of cache problem,
> so hopefully someone can point me in the right direction.
>
> We recently put into production a webserver whose document root is in
> AFS. During the development of this system, we never had an issue with
> the AFS client keeping it's cache current with what was on the server.
> Since it's been put into production, however, we are finding that we
> frequently must use fs flushvol to keep the cache up to date with the
> AFS server's version of volumes. It seems that the volumes most heavily
> hit by apache are the ones that most often need a flush to stay current.
>
> I can only hypothesize that this is therefore a transaction/load related
> issue. The webserver itself is virtually idle, but serves tens of
> thousands of requests per day.
>
> We're running RedHat Enterprise 3, Update 3 and the latest OpenAFS rpm
> available for it.
>
> Any thoughts?
Are you running any firewalling on that machine?
You could inadvertently be blocking callbacks from the fileserver that
apprise the local cache manager of changes in those files/volume.
-rob
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<br><font size=2 face="sans-serif">Thanks for your reply... I have UDP
1024-2048 and 7000-7009 open... did I miss any?</font>
<br>
<br><font size=2 face="sans-serif">-b</font>
<br><font size=2 face="sans-serif">--<br>
Brian T. Huntley, Manager of Network Operations<br>
Office of Information Technology<br>
Clarkson University<br>
bhuntley@clarkson.edu -- 315.268.6723<br>
"UNIX *is* user friendly. It's just selective about who its friends
are."<br>
</font>
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<td width=40%><font size=1 face="sans-serif"><b>Robert Banz <banz@umbc.edu></b>
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<p><font size=1 face="sans-serif">01/10/2005 10:49 AM</font>
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<td><font size=1 face="sans-serif">Brian Huntley <bhuntley@clarkson.edu></font>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [OpenAFS] Disk cache not updating</font></table>
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<br><font size=2><tt>Brian Huntley wrote:<br>
> <br>
> Hello everyone...<br>
> <br>
> I can't seem to find anything on this particular type of cache problem,
<br>
> so hopefully someone can point me in the right direction.<br>
> <br>
> We recently put into production a webserver whose document root is
in <br>
> AFS. During the development of this system, we never had an
issue with <br>
> the AFS client keeping it's cache current with what was on the server.
<br>
> Since it's been put into production, however, we are finding
that we <br>
> frequently must use fs flushvol to keep the cache up to date with
the <br>
> AFS server's version of volumes. It seems that the volumes most
heavily <br>
> hit by apache are the ones that most often need a flush to stay current.<br>
> <br>
> I can only hypothesize that this is therefore a transaction/load related
<br>
> issue. The webserver itself is virtually idle, but serves tens
of <br>
> thousands of requests per day.<br>
> <br>
> We're running RedHat Enterprise 3, Update 3 and the latest OpenAFS
rpm <br>
> available for it.<br>
> <br>
> Any thoughts?<br>
<br>
Are you running any firewalling on that machine?<br>
<br>
You could inadvertently be blocking callbacks from the fileserver that
<br>
apprise the local cache manager of changes in those files/volume.<br>
<br>
-rob<br>
</tt></font>
<br>
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