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From Doug Meil <doug.m...@explorysmedical.com>
Subject Re: How to set region parameter?
Date Thu, 10 Nov 2011 03:57:28 GMT

http://hbase.apache.org/book.html#perf.number.of.regions






On 11/9/11 9:25 PM, "吕鹏" <lvpengdlut@gmail.com> wrote:

>Thanks a lot for you help.
>
>But for question 2 and 3, the Apache book does not get give a direct
>answer, specially question 2.
>
>
>2011/11/10 Doug Meil <doug.meil@explorysmedical.com>
>
>>
>> Hi there-
>>
>> re:  #1
>>
>> http://hbase.apache.org/book.html#perf.configurations
>>
>> Regarding this, for the 0.90.x codebase the largest recommended region
>> size is 4Gb.  The "20Gb" number in the book now was for a cluster
>>running
>> which was running Hfile v2 format, which is different than what is in
>> 0.90.x.  I will update the book this weekend.
>>
>> re:  #2 and #3
>>
>> See http://hbase.apache.org/book.html#rowkey.design
>>
>>
>>
>> On 11/9/11 1:32 AM, "吕鹏" <lvpengdlut@gmail.com> wrote:
>>
>> >I have three question:
>> >1 How large a region will be, if i want to use map-reduce to analyze
>>the
>> >data in hbase table.
>> >2 How many region in a region server is suitable?
>> >3 If the rowkey in my application is not dispersive such as md5 or
>>hash,
>> >how can i control the hotspot of region split?
>> >
>> >thx
>>
>>

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