Re: Exposing cache statistics

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On Wed, 2009-04-15 at 13:30 -0700, Kevin Constantine wrote:
> Has there been any effort to expose caching statistics to the end user? 
>   On the client-side, it would be useful to see how much data is being 
> re-used from cache vs data that gets retrieved over the wire.  Similarly 
> on the server side, it would be nice to see how much data is being 
> served from cache vs having to pull the data from disk.
> 
> Just wondering if anyone started anything to expose this sort of 
> information.

See the nfs-iostat tool in the nfs-utils package:

   http://git.linux-nfs.org/?p=steved/nfs-utils.git;a=tree;f=tools/nfs-iostat;h=929e303cc762a68dfd01546f5150eb294274164e;hb=refs/heads/master

Note that you need a 2.6.17 kernel or newer.

Cheers
  Trond

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