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From Benjamin Black...@b3k.us>
Subject Re: why Cassandra 0.5.1 write speed is very slow
Date Tue, 23 Mar 2010 02:21:29 GMT
Maybe I missed this: what replication factor and consistency level are
you using?

2010/3/21 郭鹏 <gpcuster@gmail.com>:
> Thx, I will try it in the multi-thread mode.
>
> What's the best practice in the production env?
>
>
>
> 在 2010年3月21日 下午12:04,Jonathan Ellis <jbellis@gmail.com>写道:
>>
>> If you're benchmarking throughput, then you absolutely have to be
>> multithreaded.
>>
>> 2010/3/20 郭鹏 <gpcuster@gmail.com>:
>> > You mean I waste lots of time waiting for the write reply?
>> >
>> > How could I avoid this problem? Using multi-thread for very write
>> > operation?
>> >
>> > I am totally confused.
>> >
>> > Thx.
>> >
>> > 在 2010年3月21日 上午11:16,Jonathan Ellis <jbellis@gmail.com>写道:
>> >>
>> >> time a single-threaded client is spending waiting for a reply, is time
>> >> it's not spending sending another request
>> >>
>> >> 2010/3/20 郭鹏 <gpcuster@gmail.com>:
>> >> > Good ideal, I will try it with client multithread write.
>> >> >
>> >> > But I don't understand the meaning of "d the latency in cluster mode
>> >> > hurts
>> >> > that much more."
>> >> >
>> >> > Thx.
>> >> >
>> >> > 2010/3/21 Jonathan Ellis <jbellis@gmail.com>
>> >> >>
>> >> >> 2010/3/20 郭鹏 <gpcuster@gmail.com>:
>> >> >> > :)
>> >> >> >
>> >> >> > I just want to know why the write speed is ok in the standalone
>> >> >> > mode
>> >> >> > but
>> >> >> > too
>> >> >> > slow in the cluster mode.
>> >> >> >
>> >> >> > Am I doing something wrong?
>> >> >>
>> >> >> Probably, but it's hard to say what.
>> >> >>
>> >> >> Maybe you're just not using enough threads in your benchmark and
the
>> >> >> latency in cluster mode hurts that much more.
>> >> >
>> >> >
>> >> >
>> >> > --
>> >> > Regards
>> >> >    Peng Guo
>> >> >
>> >
>> >
>> >
>> > --
>> > Regards
>> >    Peng Guo
>> >
>
>
>
> --
> Regards
>    Peng Guo
>

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