just found this: https://issues.apache.org/jira/browse/CASSANDRA-2156
but seems only available to 0.8 and people submitted a patch for 0.6, I am using 0.7.4, do I need to dig into the code and make my own patch? does add compaction throttle solve the io problem? thanks! On Wed, Jul 20, 2011 at 4:44 PM, Yan Chunlu <springri...@gmail.com> wrote: > at the beginning of using cassandra, I have no idea that I should run "node > repair" frequently, so basically, I have 3 nodes with RF=3 and have not run > node repair for months, the data size is 20G. > > the problem is when I start running node repair now, it eat up all disk io > and the server load became 20+ and increasing, the worst thing is, the > entire cluster has slowed down and can not handle request. so I have to stop > it immediately because it make my web service unavailable. > > the server has Intel Xeon-Lynnfield 3470-Quadcore [2.93GHz] and 8G memory, > with Western Digital WD RE3 WD1002FBYS SATA disk. > > I really have no idea what to do now, as currently I have already found > some data loss, any suggestions would be appreciated. > -- 闫春路
