Re: Quick help on Cassandra please: cluster access and performance

2010-06-11 Thread Julie
li wei yahoo.com> writes: > > Thanks you very much, Per! > > - Original Message > From: Per Olesen trifork.com> > To: "user cassandra.apache.org" cassandra.apache.org> > Sent: Wed, June 9, 2010 4:02:52 PM > Subject: Re: Quick h

Re: Quick help on Cassandra please: cluster access and performance

2010-06-11 Thread Julie
li wei yahoo.com> writes: > > Thanks you very much, Per! > > - Original Message > From: Per Olesen trifork.com> > To: "user cassandra.apache.org" cassandra.apache.org> > Sent: Wed, June 9, 2010 4:02:52 PM > Subject: Re: Quick h

Re: Quick help on Cassandra please: cluster access and performance

2010-06-10 Thread li wei
Thanks you very much, Per! - Original Message From: Per Olesen To: "user@cassandra.apache.org" Sent: Wed, June 9, 2010 4:02:52 PM Subject: Re: Quick help on Cassandra please: cluster access and performance On Jun 9, 2010, at 9:47 PM, li wei wrote: > Thanks a lot.

Re: Quick help on Cassandra please: cluster access and performance

2010-06-09 Thread Per Olesen
On Jun 9, 2010, at 9:47 PM, li wei wrote: > Thanks a lot. > We are set READ one, WRITE ANY. Is this better than QUORUM in performance. Yes, but less consistency safe. > Do you think the cassandra Cluster (with 2 or nodes) should be always > faster than Single one node in the reality and theo

Re: Quick help on Cassandra please: cluster access and performance

2010-06-09 Thread li wei
Olesen To: "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 yo

Re: Quick help on Cassandra please: cluster access and performance

2010-06-09 Thread Per Olesen
> 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

Re: Quick help on Cassandra please: cluster access and performance

2010-06-09 Thread li wei
ject: Re: Quick help on Cassandra please: cluster access and performance Hi Wei, > 1) I found this: the 2 node is slower (30%) than one node in both of write > and select. Is this normal? (In theory, 2 nodes should be faster than one?). > I monitroing the 2 nodes and found tehy are w

Re: Quick help on Cassandra please: cluster access and performance

2010-06-09 Thread Per Olesen
Hi Wei, > 1) I found this: the 2 node is slower (30%) than one node in both of write > and select. Is this normal? (In theory, 2 nodes should be faster than one?). > I monitroing the 2 nodes and found tehy are working and flush often (so, 2 > nodes works) Which consistency level are you using