Hi Frederico, You guessed it right, distribute is the new name for DHT as the name "distribute" is more intuitive. Here is the volfile for the client with distribute+replicate with out any performance translator: ----------- volume client1 type protocol/client option transport-type tcp option remote-host sev1 option remote-subvolume brick end-subvolume volume client2 type protocol/client option transport-type tcp option remote-host sev2 option remote-subvolume brick end-subvolume volume client3 type protocol/client option transport-type tcp option remote-host sev3 option remote-subvolume brick end-subvolume volume client4 type protocol/client option transport-type tcp option remote-host sev4 option remote-subvolume brick end-subvolume volume client5 type protocol/client option transport-type tcp option remote-host sev5 option remote-subvolume brick end-subvolume volume client6 type protocol/client option transport-type tcp option remote-host sev6 option remote-subvolume brick end-subvolume volume replicate1 type cluster/replicate subvolumes client1 client2 end-volume volume replicate2 type cluster/replicate subvolumes client3 client4 end-voloume volume replicate4 type cluster/replicate subvolumes client5 client6 end-volume volume distribute type cluster/distribute subvolumes replicate1 replicate2 replicate3 end-volume ------------- If you need performance translators, you can add these translators to the end of the file: --------- ## Add readahead feature volume readahead type performance/read-ahead option page-size 1MB # unit in bytes option page-count 2 # cache per file = (page-count x page-size) subvolumes distribute end-volume ## Add IO-Cache feature volume iocache type performance/io-cache option page-size 256KB option page-count 2 subvolumes readahead end-volume ## Add writeback feature volume writeback type performance/write-behind option aggregate-size 1MB option window-size 2MB option flush-behind off subvolumes iocache end-volume ---------------------- For replicate (for nufa like effect), we have an option "option read-volume <volname>" which ensures that replicate always does the reads from the volume configured (which is usually the local storage/posix volume) Let us know if you have any more questions. Thanks Krishna On Thu, May 14, 2009 at 7:42 AM, Sacerdoti, Federico <Federico.Sacerdoti at deshawresearch.com> wrote: > Hi, > > I am benchmarking gluster, and would like to ensure I?understand the options > related to consolidating the?storage bricks. I'm a bit confused about > "cluster/unify",?"cluster/dht", and?"cluster/distribute". > > This page shows how dht is different from unify, but what is distribute, a > rename of DHT? > > http://www.gluster.org/docs/index.php/Understanding_DHT_Translator > > It would be helpful to see an example of distribute+replicate. I am trying > to approximate an HDFS setup that I've tested, which replicates files over > many servers, but favors local storage like nufa. In Gluster I am using: > > Translators: > ?fuse -> distribute -> replicate -> {bricks} > Bricks are: > ?server -> io-threads(8) -> locks -> posix_storage > > I would like to measure worst-case performance, without any cache effects. > Are there any translators or options that I should include for best > performance? > > Thanks, > fds > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > >
