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Date: Tue, 22 Mar 2011 12:12:48 -0700
Message-ID: <AANLkTikMZaK_xgZegZBRmECpR3rk4J0NSNgdO0eQuW_g@mail.gmail.com>
Subject: Re: Manual Region Splitting Question.
From: Jean-Daniel Cryans <jdcryans@apache.org>
To: user@hbase.apache.org
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bb will fall into the first region since the next start key is ca and
bb is smaller than that.

J-D

On Tue, Mar 22, 2011 at 12:07 PM, Vivek Krishna <vivekrishna@gmail.com> wro=
te:
> For eg., lets assume I have keys in range of aa, ab,ac..zz
>
> Using the sample data I create regions like this
>
> aa-ba region 1
> ca-da region 2 etc.,
>
> The reason why I did not create region bb-bz because I did not encounter =
in
> the sample.q
> But when I encounter a key like bb, it does not fall in the region I crea=
ted
> and hence follow the normal procedure I guess. ?
>
> Also, I have incoming =A0data distributed almost evenly.
> Viv
>
>
>
> On Tue, Mar 22, 2011 at 2:55 PM, Jean-Daniel Cryans <jdcryans@apache.org>=
wrote:
>
>> It depends if you are also inserting in an ordered fashion right? Even
>> if you have regions a through z, but you start inserting only keys
>> with starting with "a", then you'll only hit the first regions.
>>
>> J-D
>>
>> On Tue, Mar 22, 2011 at 11:46 AM, Vivek Krishna <vivekrishna@gmail.com>
>> wrote:
>> > I have GBs of data to be dumped to HBase. =A0After lots of trials and
>> reading
>> > through the mailing list, I figured out creating regions manually is a
>> good
>> > option because all data was hitting one node initially...
>> >
>> > My approach to creating regions is as follow.
>> > =A0 =A0- I sampled like about 1% of the actual data and created say 'n=
'
>> regions
>> > based on this sample.
>> >
>> > Now while doing the insertions, it still hits one node first and then
>> > spreads out.
>> >
>> > Our theory is that, the key it encounters while inserting does'nt fall=
 in
>> > the region that we created(using the sample) and hence it inserts as i=
t
>> > would do normally.
>> >
>> > So, has anyone approached this problem in a smarter way ?
>> >
>> > Viv
>> >
>>
>