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From zhangcheng <>
Subject why need compaction
Date Mon, 14 May 2012 03:13:15 GMT

There is some data out of date, so we need compaction to delete it. 
When read, we should merge all the version to get full data, I think this will slow down the
read performace. and at most time, we can avoid this. Then we can make compaction easy. Am
I right? 


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