[Gluster-users] Client hang on find of directories

[Joe Landman]

On 04/25/2011 12:32 PM, Mohit Anchlia wrote:
> There is something more to it. I am guessing.

Not really.  Stat-prefetch attempts to keep a copy of metadata local to 
a client for glusterfs mounts, and I think on the mountpoint server for 
the NFS clients.  Avoids the roundtrip stats if possible.  But it also 
means you have to institute some sort of cache coherency mechanism, so 
two different simultaneous accesses to the same file see the same 
metadata from two or more different servers.

I haven't gone into the code yet to look at it lately, but I suspect 
much of the issues we've been running into have been (likely) corner 
cases that the current code isn't handling well.  Turning off that 
translator seems to fix lots of our problems, so we ship systems with it 
off by default now.




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Joseph Landman, Ph.D
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