I'm running HBase 0.90.2.
-Harold --- On Thu, 6/2/11, Ted Dunning <[email protected]> wrote: > From: Ted Dunning <[email protected]> > Subject: Re: How to improve HBase throughput with YCSB? > To: [email protected] > Date: Thursday, June 2, 2011, 2:34 AM > Zookeeper has an internal limit on > number of connections. > > Which version of hbase are you running? > > On Wed, Jun 1, 2011 at 11:20 PM, Harold Lim <[email protected]> > wrote: > > > Hi Ted, > > > > For some reason, when I try the forked version of > YCSB, I can't seem to > > launch more than 10 threads. I start getting the > following errors: > > > > > > > > 11/06/02 02:17:35 INFO zookeeper.ZooKeeper: Initiating > client connection, > > connectString=xxxxxx:2181 sessionTimeout=180000 > watcher=hconnection > > 11/06/02 02:17:35 INFO zookeeper.ClientCnxn: Opening > socket connection to > > server xxxxxx:2181 > > 11/06/02 02:17:35 INFO zookeeper.ClientCnxn: Socket > connection established > > to xxxxxx:2181, initiating session > > 11/06/02 02:17:35 WARN zookeeper.ClientCnxn: Session > 0x0 for server > > xxxxxx:2181, unexpected error, closing socket > connection and attempting > > reconnect > > java.io.IOException: Connection reset by peer > > at > sun.nio.ch.FileDispatcher.read0(Native Method) > > at > sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) > > at > sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202) > > at > sun.nio.ch.IOUtil.read(IOUtil.java:169) > > at > sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243) > > at > > > org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:858) > > at > > > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1130) > > > > > > Thanks, > > Harold > > --- On Tue, 5/31/11, Ted Dunning <[email protected]> > wrote: > > > > > From: Ted Dunning <[email protected]> > > > Subject: Re: How to improve HBase throughput with > YCSB? > > > To: [email protected] > > > Date: Tuesday, May 31, 2011, 2:22 AM > > > It may make it better. > > > > > > We should have an update shortly that will allow > multiple > > > machines to > > > participate in generating load. A single > YCSB is > > > sufficient to stress a few > > > nodes but once you get to 10 or more (especially > with MapR > > > underneath) you > > > really need a cluster to generate the load. > > > > > > The synchronization strategy is very > simple. We load > > > up as usual and wait > > > for a file to appear in Zookeeper. When it > appears, > > > the load turns on. > > > > > > On Mon, May 30, 2011 at 10:08 PM, Harold Lim > <[email protected]> > > > wrote: > > > > > > > I also see that you have a forked version of > YCSB, > > > will that make my > > > > performance better? > > > > > > > > > >
