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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Persistently increasing read latency
Date Wed, 02 Dec 2009 21:20:09 GMT
I'm only reporting what trunk is like right now, not what it will be
in the future.  Trunk has been buggy before and will be again, don't
worry. :)

On Wed, Dec 2, 2009 at 2:57 PM, Ian Holsman <ian@holsman.net> wrote:
> hmm.
> doesn't that leave the trunk in a bad position in terms of new development?
> you may go through times when a major feature lands and trunk is broken/buggy.
> or are you planning on building new features on a branch and then merging into trunk
when it's stable?
>
> On Dec 3, 2009, at 5:32 AM, Jonathan Ellis wrote:
>
>> We are using trunk.  0.5 beta / trunk is better than 0.4 at the 0.4
>> functionality and IMO is production ready (although you should always
>> test first), but I would not yet rely on the new stuff (bootstrap,
>> loadbalance, and moving nodes around in general).
>>
>> -Jonathan
>>
>> On Wed, Dec 2, 2009 at 12:26 PM, Adam Fisk <a@littleshoot.org> wrote:
>>> Helpful thread guys. In general, Jonathan, would you recommend
>>> building from trunk for new deployments at our current snapshot in
>>> time? Are you using trunk at Rackspace?
>>>
>>> Thanks.
>>>
>>> -Adam
>>>
>>>
>>> On Tue, Dec 1, 2009 at 6:18 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>>> On Tue, Dec 1, 2009 at 7:31 PM, Freeman, Tim <tim.freeman@hp.com> wrote:
>>>>> Looking at the Cassandra mbean's, the attributes of ROW-MUTATION-STAGE
and ROW-READ-STAGE and RESPONSE-STAGE are all  less than 10.  MINOR-COMPACTION-POOL reports
1218 pending tasks.
>>>>
>>>> That's probably the culprit right there.  Something is wrong if you
>>>> have 1200 pending compactions.
>>>>
>>>> This is something that upgrading to trunk will help with right away
>>>> since we parallelize compactions there.
>>>>
>>>> Another thing you can do is increase the memtable limits so you are
>>>> not flushing + compacting so often with your insert traffic.
>>>>
>>>> -Jonathan
>>>>
>>>
>>>
>>>
>>> --
>>> Adam Fisk
>>> http://www.littleshoot.org | http://adamfisk.wordpress.com |
>>> http://twitter.com/adamfisk
>>>
>
> --
> Ian Holsman
> Ian@Holsman.net
>
>
>
>

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