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HBase, mail # dev - Should compaction be triggered even if User periodically flushes


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Re: Should compaction be triggered even if User periodically flushes
ramkrishna vasudevan 2013-04-05, 17:59
Raised HBASE-8282 with log snippets.

Regards
Ram
On Fri, Apr 5, 2013 at 11:14 PM, ramkrishna vasudevan <
[EMAIL PROTECTED]> wrote:

> I will raise a JIRA and attach the logs.  I saw that in 0.94 also the
> behaviour remains the same.
> I did not change any of the default configruations.
>
> Regards
> Ram
>
>
> On Fri, Apr 5, 2013 at 10:55 PM, Sergey Shelukhin <[EMAIL PROTECTED]>wrote:
>
>> +1... logs would be interesting to see, unless there was configuration
>> difference it should be the same.
>> The only thing that comes to mind if off-peak hours starting maybe?
>>
>> On Fri, Apr 5, 2013 at 9:57 AM, Jean-Daniel Cryans <[EMAIL PROTECTED]
>> >wrote:
>>
>> > That sounds like a bug to me. Can you find why it's not being compacted?
>> > Was this behavior changed at some point?
>> >
>> > Thx,
>> >
>> > J-D
>> >
>> >
>> > On Fri, Apr 5, 2013 at 9:50 AM, ramkrishna vasudevan <
>> > [EMAIL PROTECTED]> wrote:
>> >
>> > > Hi JM
>> > > Thanks for your reply.  My concern is not with respect to compaction
>> > > happening when a region is opening in another RS, my point was though
>> the
>> > > flushes were happening and more storefiles are created
>> > > by user initiated flushing, the compaction were not getting triggered.
>> > >
>> > >
>> > > On Fri, Apr 5, 2013 at 4:50 PM, Jean-Marc Spaggiari <
>> > > [EMAIL PROTECTED]
>> > > > wrote:
>> > >
>> > > > Hi Ram,
>> > > >
>> > > > What do you think is wrong with the approach below?
>> > > >
>> > > > Doing the compaction when the region is opened in another RS will
>> > > > improve data locality.
>> > > >
>> > > > JM
>> > > >
>> > > > 2013/4/5 ramkrishna vasudevan <[EMAIL PROTECTED]>:
>> > > > > Hi devs
>> > > > >
>> > > > > If user periodically flushes the memstore we keep creating Store
>> > files.
>> > > > >  Now if the number of store files  satisfies the compaction
>> policy we
>> > > > dont
>> > > > > do compaction.
>> > > > >
>> > > > > We print the msg saying compaction_requested=true but do not
>> include
>> > > into
>> > > > > the compactsplitthread.
>> > > > >
>> > > > > But when the RS goes down and the region gets opened in another
>> RS as
>> > > > part
>> > > > > of postOpenDeployTasks we do compaction because the store file
>> count
>> > > has
>> > > > > satisfied the compaction criteria.
>> > > > >
>> > > > > What could be the right approach here?
>> > > > >
>> > > > > Regards
>> > > > > Ram
>> > > >
>> > >
>> >
>>
>
>