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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Data size
Date Thu, 01 Apr 2010 01:18:45 GMT
HBase is column-oriented; every cell is stored with the row, family,
qualifier and timestamp so every pieces of data will bring a larger
disk usage. Without any knowledge of your keys, I can't comment much

Then HDFS keeps a trash so every file compacted will end up there...
if you just did the import, there will be a lot of these.

Finally if you imported the data more than once, hbase keeps 3
versions by default.

So in short, is it reasonable? Answer: it depends!


2010/3/31  <y_823910@tsmc.com>:
> Hi,
> We've dumped oracele data to files then put these files into different
> hbase table.
> The size of these files is 35G; we saw the HDFS usage up to 562G after
> putting it into hbase.
> Is that reasonable?
> Thanks
> Fleming Chiu(邱宏明)
> 707-6128
> y_823910@tsmc.com
> 週一無肉日吃素救地球(Meat Free Monday Taiwan)
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