linux-kernel - Re: Pull request for FS-Cache, including NFS patches

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Date:	Fri, 19 Dec 2008 18:24:19 +0000
From:	David Howells <dhowells@...hat.com>
To:	"Muntz, Daniel" <Dan.Muntz@...app.com>
Cc:	dhowells@...hat.com, "Andrew Morton" <akpm@...ux-foundation.org>,
	sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
	nfsv4@...ux-nfs.org, steved@...hat.com,
	linux-fsdevel@...r.kernel.org, rwheeler@...hat.com
Subject: Re: Pull request for FS-Cache, including NFS patches

Muntz, Daniel <Dan.Muntz@...app.com> wrote:

> AFS was designed to support local disk cache, so with callbacks you can get a
> consistent system.

It's less the callbacks and more the data version number that's important.

> I'll ass-u-me that Linux flavors of AFS have callbacks. 

They do.

> It should be possible to *integrate* NFSv4.x with FS-Cache similarly (i.e., I
> don't think you could drop it in as a 'black-box' without breaking something,
> unless you explicitly build an independent proxy cache server).

NFSv4 has equivalents of both the data version number and callbacks.

David
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