Re: bad behavior of my Cassandra cluster

2010-08-03 Thread Mingfan Lu
ndard IO? > I could not access the file you linked to. > Aaron > > > On 04 Aug, 2010,at 02:46 PM, Mingfan Lu wrote: > > Hi, > I have a 4-node cassandra cluster. And I find when the 4 nodes are > flushing memtable and gc at the very similar moment, the throughput > will dro

bad behavior of my Cassandra cluster

2010-08-03 Thread Mingfan Lu
Hi, I have a 4-node cassandra cluster. And I find when the 4 nodes are flushing memtable and gc at the very similar moment, the throughput will drop and latency will increase rapidly and the nodes are dead and up frequently You could download the IOPS variance of data disk (sda here) and sy

Can't find the storageproxy using jconsole

2010-07-27 Thread Mingfan Lu
I am using Jconsole to access JMX and find out that I can't find storageproxy under mbean tab while I can get information of storageservice. It is very interesting that I find the storageproxy has been registered in source code. private StorageProxy() {} static { MBeanServer mbs =