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?
> >
>
