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From "Ski Gh3" <ski...@gmail.com>
Subject log replication in hbase
Date Mon, 20 Oct 2008 21:49:56 GMT
Just want to make sure my understanding of the log is correct:

each regionserver has one log for all the regions it is serving.
this log is the write-ahead log that is stored on hadoop dfs and always
written before a data is written to memcache.
is this correct?

I read about a redo log from the mailing list, which says each regionserver
maintains a redo log locally.
is this the wal log or what is the purpose of this redo log?


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