From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
From: "Douglas A. Gwyn" <DAGwyn@null.net>
Message-ID: <3B052A55.8EED5F17@null.net>
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References: <20010512130225.4B64F199E1@mail.cse.psu.edu>, <9dshfp$3cu$1@cantaloupe.srv.cs.cmu.edu>, <3B042432.691F18B8@null.net>
Subject: Re: [9fans] Persistent cache for cfs
Date: Fri, 18 May 2001 14:50:57 +0000
Topicbox-Message-UUID: a1544296-eac9-11e9-9e20-41e7f4b1d025

"Douglas A. Gwyn" wrote:
> ... files have a new two-valued attribute, "temporary"
> or "permanent" ...

It occurs to me that this could be generalized to a
"priority level" treated uniformly by the caching
subsystem, with low-priority files more subject to
replacement in the cache.  The cache "scheduler"
could also take into account access pattern (time
since last access or something more clever).  One
could play with the cache scheduling algorithm
without massing with the filesystem representation
once the priority-level attribute existed.