On Fri, Apr 2, 2010 at 3:32 PM, Olivier Le Cam < [email protected]> wrote:
> Hi - > > I am evaluating glusterfs for a replacement of an NFS server which acts as > a backend storage for a webcluster, in order to take advantage of its very > interesting features in term of high-availability and scalability. > > That said, I'm experiencing (like everybody in the same situation) > performance issues due to the large number of small files a webserver have > to deal with. > > The io-cache translator does not help so much in this situation because (as > far as I understood) the clients always have to check the mtime of the > target file before delivering it in order to known if the cache is > up-to-date. This intensive network traffic is quite penalizing in term of > performance (especially on a Gb-E). > > Following to a recent talk on the IRC channel, it came to my mind that > caching lookups could (in this particular situation) greatly improve the > performances. > If you are not very much concerned about file being changed from other clients while it is being cached, you can set 'cache-timeout' value in io-cache configuration to some high value, there by increasing the time intervals at which stat call is sent to server to check whether the file has changed. > > I have observed the GlusterFS code carefully and TBH I haven't been able to > see how/where such a translator could be integrated in. > > Would it be possible to get some help? Are other users/developers already > involved in such a development? > If you are just interested in caching stats for beniefit of io-cache, the same functionality can be achieved by tuning cache-timeout value in io-cache. > > I don't want to bother you more than necessary, getting few advices would > be enough in order to put me on the way. > > I'll appreciate any comments or pointers. > > Thanks and best regards, > -- > Olivier > > > > > _______________________________________________ > Gluster-devel mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/gluster-devel > -- Raghavendra G
_______________________________________________ Gluster-devel mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/gluster-devel
