incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: New User: OSX vs. Debian on Cassandra 0.5.0 with Thrift
Date Fri, 23 Apr 2010 19:33:51 GMT
Nice detective work!  Good to know what was causing that.  Thanks!

On Fri, Apr 23, 2010 at 2:29 PM, Heath Oderman <heath@526valley.com> wrote:
> Really interesting find.
> After Jonathan E. suggested py_stress and it seemed clear the problem was in
> my .net client I spent a few days debugging the client in detail.
> I ended up changing my CassandraContext instantiation to use a
>           TBuffferedProtocol(TSocket) instead of a
>           TSocket directly.
> The difference was *dramatic*.
> The calls to debian suddenly behaved as expected, eclipsing the write speeds
> under load of the calls to the OSX box by a factor of 2!
> The change caused a performance increase in the client communicating with
> OSX as well, but the improvement was smaller.
> I don't understand exactly, but clearly there's a difference in the way that
> Debian and OSX handle socket level communications that has a big effect on a
> .net client calling in from windows.
> It's been a really interesting experiment and I throughly appreciate all the
> help and pointers I've gotten from this list.
> Cassandra is so fast, and so impressive it strains credibility.  I'm totally
> amazed by what these guys have put together.
> Thanks,
> Stu

Mime
View raw message