hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From chenwenhui <c77...@163.com>
Subject What is the difference between "hbase.server.thread.wakefrequency" and "hbase.hregion.majorcompaction"?
Date Thu, 21 Aug 2014 10:01:11 GMT
From the book named "Hbase: the Definitive Guide", i know that there is a condition to trigger
major compaction, i.e. a thread controlled by "hbase.server.thread.wakefrequency(10 seconds
by default)" and "hbase.server.thread.wakefrequency.multiplier" checks periodically whether
major compaction. 
But i also read that the other conditon, both "hbase.hregion.majorcompaction(7 days by default)"
and "hbase.hregion.majorcompaction.jitter", can also trigger major compaction.
As my understanding, because of the former, the latter condition will never execute.
Maybe i mis-undertand the two conditions, anyone can explain the difference between the two
condtions? Thanks!
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message