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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: running TPC-C on cassandra clusters
Date Fri, 13 May 2011 03:05:58 GMT
Not if you want the pausing/marking down fixes that were done more recently. :)

On Thu, May 12, 2011 at 8:39 PM, Xiaowei Wang <xiaowei609@gmail.com> wrote:
> Oh sorry, we use cassandra-0.7.4 already. Is the version fine?
>
> 2011/5/12 Jonathan Ellis <jbellis@gmail.com>
>>
>> https://svn.apache.org/repos/asf/cassandra/branches/cassandra-0.7
>>
>> On Thu, May 12, 2011 at 8:33 PM, Xiaowei Wang <xiaowei609@gmail.com>
>> wrote:
>> > Thanks Jonathan, but can you provide some links about 0.7 svn branch?
>> >
>> > 2011/5/12 Jonathan Ellis <jbellis@gmail.com>
>> >>
>> >> I'd recommend trying the 0.7 svn branch (soon to be voted on as 0.7.6)
>> >>
>> >> On Thu, May 12, 2011 at 3:09 PM, Xiaowei Wang <xiaowei609@gmail.com>
>> >> wrote:
>> >> > Hi all,
>> >> >
>> >> > My partner and I currently using cassandra cluster to run TPC-C. We
>> >> > first
>> >> > use 2 ec2 nodes to load 20 warehouses. One(client node)  has 8 cores,
>> >> > the
>> >> > other(worker node) has 4 cores. During the loading time, either the
>> >> > client
>> >> > node or the worker node will "down"(cannot be detected) randomly and
>> >> > then
>> >> > "up" again in a short time. If the two nodes both down, we failed in
>> >> > loading. If only one of them down, we can continue to load data.
>> >> >
>> >> > The problem is if we use multiple threads(we write multiprocess
>> >> > code),
>> >> > say 4
>> >> > clients threads, some of them might be stop at the point one of the
>> >> > nodes
>> >> > first down, and the dead threads will never come back.... This will
>> >> > not
>> >> > only
>> >> > enlarge our loading time, but also effect the amount of data we can
>> >> > load.
>> >> >
>> >> > So we need to figure out why the nodes continue to be up and down and
>> >> > fix
>> >> > this problem.
>> >> >
>> >> > Thanks for any help!
>> >> >
>> >> > Best,
>> >> > Xiaowei
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> Jonathan Ellis
>> >> Project Chair, Apache Cassandra
>> >> co-founder of DataStax, the source for professional Cassandra support
>> >> http://www.datastax.com
>> >
>> >
>>
>>
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of DataStax, the source for professional Cassandra support
>> http://www.datastax.com
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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