Re: Fixes for NFS in environments with large group memberships

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On Mon, Apr 04, 2011 at 10:02:59AM +0200, Finney, Sean wrote:
> Hi There!
> 
> Last week I fired off a couple patches to this list and in hindsight I
> realize that I might not have been totally clear for the motivation
> behind the patches:
> 
> [PATCH] Use a named constant for max number of managed groups, and inc
> [PATCH] Increase the default buffer size for cachelist channel files.

I can't find those; could you resend?

--b.

> 
> Since nobody has reviewed them yet, I thought I'd make it clear that
> these changes (or something along such lines) are required for NFS
> access to mountpoints when users are in largeish (>100) numbers of
> groups.  There are actually two problems:
> 
> * Hard-coded limit for group membership at 100 groups in mountd source
> * Large server-side procfs writes are split into mulitple writes due to
> stdio buffering in mountd and svcgssd sources, resulting in client
> hangs.
> 
> The patches in question solve this in as non-intrusive a manner as
> possible, though I'm of course open to changing things up if you feel it
> should be done otherwise.  So please let me know what you think, or if
> it would be better for me to first go and open a bug, start a
> discussion, etc.
> 
> 
> Thanks,
> Sean 
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