Re: Which kind of applications are Cassandra fit for?

2010-06-01 Thread
Thanks, but would you please describe it in more details, because most applications require fast response for retrieval. 2010/6/1 sharanabasava raddi > The applications which require bigger storage and fast response for > retrieval. > > > On Tue, Jun 1, 2010 at 6:13 PM, 史英杰 wro

Which kind of applications are Cassandra fit for?

2010-06-01 Thread
Hi,ALL I found that most applications on Cassandra are for web applications, such as store friiend information or digg information, and they get good performance, many companies or groups want to move their applications to Cassandra, so which kind of applications are Cassandra fit for? Thank

Re: writing speed test

2010-06-01 Thread
Hi, It would be better if we know which Consistency Level did you choose, and what is the schema of test data? 在 2010年6月1日 下午4:48,Shuai Yuan 写道: > Hi all, > > I'm testing writing speed of cassandra with 4 servers. I'm confused by > the behavior of cassandra. > > ---env--- > load-data app written

Re: Why Cassandra performs better in 15 nodes than in 20 nodes?

2010-05-23 Thread
me. You should upgrade > to 0.6.1. (Read NEWS first to see what has changed.) > > 2010/5/23 史英杰 : > > The replication factor is 3, and the consistency level is default, zero. > > > > 在 2010年5月24日 上午7:25,Jonathan Shook 写道: > >> > >> It would be helpful to kn

Re: Why Cassandra performs better in 15 nodes than in 20 nodes?

2010-05-23 Thread
The replication factor is 3, and the consistency level is default, zero. 在 2010年5月24日 上午7:25,Jonathan Shook 写道: > It would be helpful to know the replication factor and consistency > levels of your reads and writes. > > > 2010/5/23 史英杰 : > > Thanks for your reply! >

Re: Why Cassandra performs better in 15 nodes than in 20 nodes?

2010-05-23 Thread
he clients run on one server of the 20 servers, I used 10 threads to run the write and read tasks. How many threads can make Cassandra get good throughput? Thanks! 2010/5/23 Mark Robson > On 23 May 2010 13:42, 史英杰 wrote: > >> Hi, All >>I am now doing some tests on Cass

Why Cassandra performs better in 15 nodes than in 20 nodes?

2010-05-23 Thread
Hi, All I am now doing some tests on Cassandra, and I found that both writes and reads on 15 nodes are faster than that of 20 nodes, how many servers does one Cassandra system contains during the real applications? Thanks a lot ! Yingjie

Re: What happened if one server involved in the process of data reading fail?

2010-05-20 Thread
What inner mechanism does Cassandra adopt to get this kind of fault tolerance? 2010/5/20 Simon Smith > On Thu, May 20, 2010 at 8:08 AM, 史英杰 wrote: > > Hi, All, > > I am now learning the mechanism Cassandra adopts to get high > > availability and fault tolerance.

What happened if one server involved in the process of data reading fail?

2010-05-20 Thread
Hi, All, I am now learning the mechanism Cassandra adopts to get high availability and fault tolerance. As I know, we should connect to one server of Cassandra first, then we can read or write data through it, so if the server which we connect to get down, what will happen? Should we have to