This depends quite a bit on the sizes of your objects. Supposing an average size of 2KB, and n=3: on each write, on average 1.5 of the replicas would be on the other node, implying inter-node network traffic of 1.5*2KB=3KB (and this is just in one direction). If your inter-node network connection is indeed 10Mbit ~ 1MB/s, then 300 writes/s * 3KB = 0.9MB/s would just about saturate the connection.
You may want to check the network utilization. ________________________________________ From: riak-users-boun...@lists.basho.com [riak-users-boun...@lists.basho.com] On Behalf Of Catalin Constantin [daz...@gmail.com] Sent: 20 November 2011 11:10 To: riak-users@lists.basho.com Subject: slow 2 node cluster Hello, I am trying to evaluate / run some tests on a 4 mil dataset. I have 2 nodes setup (different machines - 8GB ram each, I7 cpus). 10 MB connection between them. I am trying to insert data into riak using w=1 and dw=1 (also tried with dw = 0, w = 0). For each risk object i have 4 indexes (2 binary 2 int). Riak backend is leveldb. I can't get more than 300 inserts per second. I have also tried running 2 threads each hitting the different node. Nothing changed too much. Is this normal behavior ? -- Catalin Constantin _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
