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From sahanashankar <sahanashanka...@gmail.com>
Subject Re: can read operation be performed during the execution of major compaction
Date Fri, 24 Oct 2014 09:30:55 GMT
Thank u so much for your response.

It makes sense to me now.



On 20 Oct 2014 20:27, "Elliott Clark-3 [via Apache HBase]" <
ml-node+s679495n4065210h82@n3.nabble.com> wrote:

> No read operations are not blocked by any compactions.
>
> Compaction will swap in it's newly created file for any subsequent read
> requests. Any read requests that come in during the compaction will be
> answered from the files already there and the memstore.
>
> On Mon, Oct 20, 2014 at 8:52 AM, sahanashankar <[hidden email]
> <http://user/SendEmail.jtp?type=node&node=4065210&i=0>>
> wrote:
>
> > Hello,
> >
> > I am trying to understand the working of major compaction and i am
> > wondering
> > if a read operation can be performed while the major compaction process
> is
> > running on HBase. Will the read operation be queued and start after
> major
> > compaction has finished executing? or can both execute together?
> >
> > To be more general, will only the particular region be blocked during
> major
> > compaction or will the entire RegionServer hosting the region be blocked
> ?
> >
> > Thanks in advance
> > Sahana
> >
> >
> >
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