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Date: Tue, 25 Aug 2015 10:40:12 -0700
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Subject: Re: Using HBase with a shared filesystem (gluster, nfs, s3, etc)
From: Ted Yu <yuzhihong@gmail.com>
To: "user@hbase.apache.org" <user@hbase.apache.org>
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Please see http://hbase.apache.org/book.html#regions.arch.assignment

On Tue, Aug 25, 2015 at 10:37 AM, donmai <doodnet@gmail.com> wrote:

> NFS
> 0.98.10
> Will get to you as soon as I am able, on travel
>
> Is my general understanding correct, though, that there shouldn't be any
> data movement from a region reassignment?
>
> On Tue, Aug 25, 2015 at 12:40 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>
> > Can you give a bit more information:
> >
> > which filesystem you use
> > which hbase release you use
> > master log snippet for the long region assignment
> >
> > Thanks
> >
> > On Tue, Aug 25, 2015 at 9:30 AM, donmai <doodnet@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > I'm curious about how exactly region movement works with regard to data
> > > transfer. To my understanding from the docs given an HDFS-backed
> > cluster, a
> > > region movement / transition involves changing things in meta only, all
> > > data movement for locality is handled by HDFS. In the case where
> rootdir
> > is
> > > a shared file system, there shouldn't be any data movement with a
> region
> > > reassignment, correct? I'm running into performance issues where region
> > > assignment takes a very long time and I'm trying to figure out why.
> > >
> > > Thanks!
> > >
> >
>

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