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From Ryan King <r...@twitter.com>
Subject Re: rainbird question (why is the 1minute buffer needed?)
Date Mon, 23 May 2011 23:56:05 GMT
Maybe. We haven't really tested it without buffering and probably
won't anytime soon. 1 minute latency is good enough for what we're
doing.

On Mon, May 23, 2011 at 1:58 PM, Jeremy Hanna
<jeremy.hanna1234@gmail.com> wrote:
>
> On May 23, 2011, at 2:23 PM, Ryan King wrote:
>
>> On Mon, May 23, 2011 at 12:06 PM, Yang <teddyyyy123@gmail.com> wrote:
>>> Thanks Ryan,
>>>
>>> could you please share more details: according to what you observed in
>>> testing,  why was performance  worse if you do not do extra buffering?
>>>
>>> I was thinking (could be wrong)  that without extra buffering, the
>>> counter update goes to Memtable.putIfPresent() and
>>> CounterColumn.resolve(),
>>> which are still in-memory operations, and thus would not be so bad ?
>>
>> You're forgetting the commit log.
>
> Would https://issues.apache.org/jira/browse/CASSANDRA-2683 help with that?
>

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