Trond Myklebust wrote:
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
Thanks Trond-
It seems like nfs-iostat is displaying the number of pages that are
being written to the read/write caches (i'm only looking at the
client-side at the moment), and what I'm interested in is the ratio of
pages being read from cache vs data being fetched from the server.
Is there any documentation on the layout of /proc/self/mountstats?
-kevin
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