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From Davey Yan <davey....@gmail.com>
Subject Re: hbase improve random read/write performance
Date Mon, 16 Jul 2012 02:17:21 GMT
In the last few days, I have just tuned a test cluster with only 3
servers(16cores/24GB memory/SATA).
Random write rate improved from few MB/s to 90MB/s.

The key factors for me are:
1. snappy compression
2. random rowkey with a prefix hash value(left half of md5, 8Bytes)
3. pre-split with org.apache.hadoop.hbase.util.RegionSplitter.HexStringSplit
4. no auto-split with hbase.hregion.max.filesize => 100GB
5. tuning hbase.regionserver.handler.count/hbase..thrift.minWorkerThreads
according to your clients' request
6. thrift is also a CPU consuming guy, you should consider having
several instances of it if your client is non-java.
7. disable writeToWAL if you feel no pain
8. other tips: http://gbif.blogspot.dk/2012/07/optimizing-writes-in-hbase.html


On Fri, Jul 13, 2012 at 6:28 PM, xkwang bruce <bruce.xkwang1@gmail.com> wrote:
> hi all,
> I plan to use hbase to support a online application that need
> high concurrency random read . There id hundreds of gb data every day and
> that will be add hbase.
> Any links, articals, suggestions, ideas that will improve hbase random
> read/write performance will be appreciated.
> bruce
> best regards!!!

Davey Yan

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