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From Mohit <mohitsi...@huawei.com>
Subject Difference between logs present under /hbase/.logs and /hbase/testTable/6674094/.logs directory
Date Wed, 15 Dec 2010 05:41:10 GMT
Hello HBase Users,

 

I explored the root directory of hbase on dfs which is /hbase, under it I
found two logs folders /hbase/.logs and a log directory under each table, in
this case testTable.

/hbase/testTable/6674094/.logs.

 

As per HBase storage structure, data is written to write-ahead-log, OR Hlog
and then to memstore for each hstores(directly proportional to column
families) and after that to dfs, such that each Hregion has it's own
instance of Hlog, so what is this log directory /hbase/.logs which during
startup of Hmaster is checked for the presence of log files for uninformed
splits.

 

So I'm bit confused, what is the purpose of each, and how they fit in.

 

-Mohit

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