[OpenAFS] Is it in the cache?

[Tim Theisen]

Jeffrey,

Thanks for the clarification.  It appears that there is no way to tell
what chunks are in the cache.

So, I would guess that a reasonable plan B would be to keep track of the
last time a file was read be each node, and assume that if you were the
last node to read a file, that it would still be in your cache.  This
heuristic should work almost all of the time.


...Tim
--
       Tim Theisen                     Lead Research Software Engineer
Phone: +1 608 824 2848                 TomoTherapy Incorporated
  Fax: +1 608 824 2996                 1240 Deming Way
  Web: http://www.tomotherapy.com      Madison, WI 53717-1954 =20


-----Original Message-----
From: Jeffrey Altman [mailto:jaltman@secure-endpoints.com]=20
Sent: Monday, April 30, 2007 10:11
To: Tim Theisen
Cc: FB; OpenAFS-Discussion
Subject: Re: [OpenAFS] Is it in the cache?

All that tells you is whether or not a stat cache entry exists
for the file.   The process of evaluating $FILENAME will create
a stat cache entry.  The only way this would fail is when $FILENAME
doesn't exist.

Jeffrey Altman

Tim Theisen wrote:
> Thanks for the tip.  This will probably suffice.
>=20
> ...Tim
>
> try this:
>=20
>  $ fs getfid $FILENAME
>  File $FILENAME ($xxxxxxxx.$yy.$zzzz) contained in volume $xxxxxxxxx
>  $ cmdebug -servers localhost -long | grep $xxxxxxxxx.$yy.$zzzz
>=20
> This tells you, if a file is "in any way" in the cache. It will
however
> not tell you, which parts (chunks) of it are stored locally.
>=20
> Regards,
>=20
> Frank
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