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From stack <st...@duboce.net>
Subject Re: log replication in hbase
Date Tue, 21 Oct 2008 04:33:08 GMT
Ski Gh3 wrote:
> Just want to make sure my understanding of the log is correct:
>
> each regionserver has one log for all the regions it is serving.
>   

Yes.

> 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?
>   

Yes.

> 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?
>   
Yes.

Sorry for any confusion.  We should be try and be more strict with our 
nomenclature.

St.Ack


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