Hussam, Could you paste the contents of your basho_bench config into an email and send it over?
-- Ian Plosker <[email protected]> Developer Advocate Basho Technologies On Thursday, February 2, 2012 at 7:33 PM, Hussam Abu-Libdeh wrote: > Hello, > > I am trying to benchmark Riak on a local cluster. I have Riak v1.0.2 > compiled from source. I am benchmarking using Basho's benchmarking > tool, and I used Riaknostic to help me with configuration. My machines > are all Dual Xeon with 2GB of RAM and 1Gb ethernet. I get about 50MB/s > write throughput on the local disks, and the local disks are mounted > with the noatime flag as Riaknostic suggested. > > I benchmarked the write throughput of Bitcask by running a local > experiment where 1 worker was continuously writing 10K fixed_binary > objects ( {value_generator, {fixed_bin, 10000}}. ) with the only > bitcask-specific flag being: {bitcask_flags, [{sync_strategy, none}]}. > I got about 50 MB/s write throughput from Bitcask, so that is good. > > Then I tried to benchmark Riak. I setup a cluster of 8 Riak nodes with > the same configuration as used for Bitcask. I used the riakclient > driver from the benchmarking suite, and set the required riak_client > replies to 1. The client was generating PUT operations continuously > with 10K binaries as before. I only got a throughput of about 4 MB/s. > I thought this might be an issue of storing extra copies due to > replication, so I modified the app.config file on all the nodes to > specify that N, R, and W are all set to 1. No improvement. I thought > this could be an issue in the network, so I benchmarked a single-node > cluster, with the client being local to the same machine (and N,R,W > all set to 1), and I still got the same low throughput. Finally, out > of desperation, I even modified the target_n_val parameter to 1 and > the ring_creation_size to 1 so there is only 1 Bitcask directory, ran > the experiment with 1 local client, and I still got the same very low > throughput. > > Any help would be greatly appreciated. I have been stuck at this for a > while now. > > Thanks, > > --Hussam > > _______________________________________________ > riak-users mailing list > [email protected] (mailto:[email protected]) > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > >
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