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From Jean-Marc Spaggiari <jean-m...@spaggiari.org>
Subject Re: why Hbase only split regions in one RegionServer
Date Wed, 16 Mar 2016 11:17:05 GMT
+1 with what Heng said. I think we should just deprecate the ability to not
pre-split a table ;) It's always good to pre-split it based on your key
design...

2016-03-16 0:17 GMT-04:00 Heng Chen <heng.chen.1986@gmail.com>:

> bq. the table I created by default having only one region
>
> Why not pre-split table into more regions when create it?
>
> 2016-03-16 11:38 GMT+08:00 Ted Yu <yuzhihong@gmail.com>:
>
> > When one region is split into two, both daughter regions are opened on
> the
> > same server where parent region was opened.
> >
> > Can you provide a bit more information:
> >
> > release of hbase
> > whether balancer was turned on - you can inspect master log to see if
> > balancer was on
> >
> > Consider pastebinning portion of master log.
> >
> > Thanks
> >
> > On Tue, Mar 15, 2016 at 4:43 PM, jackwang <wangjiajie917@gmail.com>
> wrote:
> >
> > > I was writing 300GiB data to my Hbase table user_info, the table I
> > created
> > > by
> > > default having only one region. When the writing was going I saw one
> > region
> > > became two regions and more late on it became 8 regions. But my
> confusion
> > > is
> > > that the 8 regions were kept in the same RegionServer.
> > >
> > > Why Hbase didn't split the regions to different RegionServer. btw, I
> had
> > 10
> > > physical RegionsServers in my Hbase cluster, and the region size I set
> is
> > > 20GiB, Thanks!
> > >
> > >
> > >
> > > --
> > > View this message in context:
> > >
> >
> http://apache-hbase.679495.n3.nabble.com/why-Hbase-only-split-regions-in-one-RegionServer-tp4078497.html
> > > Sent from the HBase User mailing list archive at Nabble.com.
> > >
> >
>

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