Thanks a lot. We are set READ one, WRITE ANY. Is this better than QUORUM in performance.
Thanks. Do you think the cassandra Cluster (with 2 or nodes) should be always faster than Single one node in the reality and theory? Or it depends? Thanks again! ----- Original Message ---- From: Per Olesen <p...@trifork.com> To: "user@cassandra.apache.org" <user@cassandra.apache.org> Sent: Wed, June 9, 2010 3:33:20 PM Subject: Re: Quick help on Cassandra please: cluster access and performance > How to set "write and read with QUORUM"? You set this through each thrift api call you are making through your java code. See http://wiki.apache.org/cassandra/API > They are run physically separate hw (But same since they are VM) So they share disk. I think this can have an influence. As I understand it, cassandra can be fast on writes because its storage format is designed so that it needs to do very few random io, which results in fever seeks. And I think part of the good read performance comes from data on keys being distributed onto different nodes, which then means distributed reads on separate disks. When nodes share disk, I think a lot of this is negated.
