Hello. We are using java async thrift client. As of ruby, it seems you need to use something like http://www.mikeperham.com/2010/02/09/cassandra-and-eventmachine/ (Not sure as I know nothing about ruby).
Best regards, Vitalii Tymchyshyn 2012/4/3 Jeff Williams <je...@wherethebitsroam.com> > Vitalii, > > Yep, that sounds like a good idea. Do you have any more information about > how you're doing that? Which client? > > Because even with 3 concurrent client nodes, my single postgresql server > is still out performing my 2 node cassandra cluster, although the gap is > narrowing. > > Jeff > > On Apr 3, 2012, at 4:08 PM, Vitalii Tymchyshyn wrote: > > > Note that having tons of TCP connections is not good. We are using async > client to issue multiple calls over single connection at same time. You can > do the same. > > > > Best regards, Vitalii Tymchyshyn. > > > > 03.04.12 16:18, Jeff Williams написав(ла): > >> Ok, so you think the write speed is limited by the client and protocol, > rather than the cassandra backend? This sounds reasonable, and fits with > our use case, as we will have several servers writing. However, a bit > harder to test! > >> > >> Jeff > >> > >> On Apr 3, 2012, at 1:27 PM, Jake Luciani wrote: > >> > >>> Hi Jeff, > >>> > >>> Writing serially over one connection will be slower. If you run many > threads hitting the server at once you will see throughput improve. > >>> > >>> Jake > >>> > >>> > >>> > >>> On Apr 3, 2012, at 7:08 AM, Jeff Williams<je...@wherethebitsroam.com> > wrote: > >>> > >>>> Hi, > >>>> > >>>> I am looking at cassandra for a logging application. We currently log > to a Postgresql database. > >>>> > >>>> I set up 2 cassandra servers for testing. I did a benchmark where I > had 100 hashes representing logs entries, read from a json file. I then > looped over these to do 10,000 log inserts. I repeated the same writing to > a postgresql instance on one of the cassandra servers. The script is > attached. The cassandra writes appear to perform a lot worse. Is this > expected? > >>>> > >>>> jeff@transcoder01:~$ ruby cassandra-bm.rb > >>>> cassandra > >>>> 3.170000 0.480000 3.650000 ( 12.032212) > >>>> jeff@transcoder01:~$ ruby cassandra-bm.rb > >>>> postgres > >>>> 2.140000 0.330000 2.470000 ( 7.002601) > >>>> > >>>> Regards, > >>>> Jeff > >>>> > >>>> <cassandra-bm.rb> > > > > -- Best regards, Vitalii Tymchyshyn
