lonel, in this config you are not exploiting on the parellelism of the N disk controllers. you need to have io-threads b/w each stripe and storage/posix and have write-behind and read-ahead on top of stripe. each io-threads on top of storage/posix pushes blocked read/write to a seperate thread giving scope for parallelism across the two storage/posix (which is needed as they are on seperate disks). the read-ahead and write-behind are needed for 'creating' the parallelism. without them the IO calls happen in series (1:1 with the system calls). avati 2007/12/17, GARDAIS Ionel <Ionel.Gardais@xxxxxxxxxxxxxxxxxx>: > > Thanks Anand for being there to answer all my questions ! > > I've used the cluster/stripe translator in a local-only setup > > # glusterfs client > volume data-2-local > type storage/posix > option directory /data-2 > end-volume > > volume data-3-local > type storage/posix > option directory /data-3 > end-volume > > volume data-striped > type cluster/stripe > subvolumes data-2-local data-3-local > option block-size *:1MB > end-volume > > > Whatever the block-size (64kB, 128kB, 1MB, 64MB), iostat reports > 30MB/s/disk which is less than half the nominal (each data-X storage is a > separate XRaid FC controller able to ingest 80MB/s) > > > -------- Message d'origine-------- > De: anand.avati@xxxxxxxxx de la part de Anand Avati > Date: dim. 16/12/2007 19:03 > À: GARDAIS Ionel > Cc: gluster-devel@xxxxxxxxxx > Objet : Re: ext3 eligible for cluster/stripe ? > > If the kernel option is turned on, yes it does. you can verify with > getfattr/setfattr > > avati > > 2007/12/16, GARDAIS Ionel <Ionel.Gardais@xxxxxxxxxxxxxxxxxx>: > > > > Hi list, > > > > I've found that what I want to archieve is more something like > > cluster/stripe than cluster/unify. > > However, a special note for stripe translator state "Stripe needs > extended > > attribute support in the underlying FS." > > > > Does ext3 meet this requirement ? > > > > Thanks, > > Ionel > > _______________________________________________ > > Gluster-devel mailing list > > Gluster-devel@xxxxxxxxxx > > http://lists.nongnu.org/mailman/listinfo/gluster-devel > > > > > > -- > If I traveled to the end of the rainbow > As Dame Fortune did intend, > Murphy would be there to tell me > The pot's at the other end. > > -- If I traveled to the end of the rainbow As Dame Fortune did intend, Murphy would be there to tell me The pot's at the other end.
