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From Yang <teddyyyy...@gmail.com>
Subject Re: weird problem with performance
Date Wed, 19 Oct 2011 18:50:34 GMT
3

sorry forgot this important info
On Oct 19, 2011 11:31 AM, "Jérémy SEVELLEC" <jsevellec@gmail.com> wrote:

> Hi, what is your replication_factor?
>
> 2011/10/19 Yang <teddyyyy123@gmail.com>
>
>> I'm using a cassandra version compiled from 1.0.0  github HEAD.
>>
>> I have 3 nodes, A B and C,  on node A I run a client, which talks only
>> to B as the coordinator.
>>
>> the performance is pretty good, a QUORUM read+write  takes < 10ms.
>>
>> but then I shutdown C, quickly the performance starts to degrade, and
>> QUORUM read+write time steadily increase to about 300ms.
>>
>> if I shutdown A and keep C, I observe the same effect.
>>
>>
>> I understand that "2 out of 3" is going to give you faster response
>> than "2 out of 2", but  the difference should not be that dramatic as
>> 10ms vs 300ms.
>>
>> any possible reasons for this?(or how to debug this?)
>>
>> Thanks
>> Yang
>>
>
>
>
> --
> Jérémy
>

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