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Date:      Mon, 19 Feb 1996 18:03:01 -0500
From:      ejon@tiac.net (Eric Jones)
To:        Terry Lambert <terry@lambert.org>
Cc:        questions@freebsd.org
Subject:   Re: NQNFS problems
Message-ID:  <199602192303.SAA01133@cola.tiac.net>

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>
>The leases are revoked on reference; not before.  Local cache coherency
>is not maintained.

I'm a little unclear on what you mean by "on reference"  Do you mean on
a write attempt?  It seems to me that if a process on the server machine
wants to write to a file which has leases against it, it ought to revoke 
those leases immediately, or at least when a client attempts to read
additional data.
>
>What kind of clients are you using?
>
Pentium 133's with 64-128 MB of RAM (if you're wondering about the size
of buffer caches).  We're setting up a new ISP with the biggest FBSD
cluster _I_'ve ever heard of.  Unfortunately, we're having a VM problem/crisis
(another message on that will follow on the questions list) which may
monkeywrench the plans.

>Caching NFS is evil.
>
Yeah.  Well, it would be somewhat helpful on our read-only fairly static
file systems (like /usr/local), but perhaps the price is too high stability-
wise.

Eric





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