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From Ted Yu <yuzhih...@gmail.com>
Subject Re: hbase regionserver fail over -- how long it will take?
Date Sat, 21 Sep 2013 03:44:55 GMT
bq. another regionserver, which contain another copy of the data,  will
pick up.

Replica of data (HFile and WAL) is stored on data nodes.

In http://hbase.apache.org/book.html, take a look at 9.7.2.2. Failover
and 9.7.3. Region-RegionServer Locality

Cheers


On Fri, Sep 20, 2013 at 4:14 PM, Demai Ni <nidmgg@gmail.com> wrote:

> hi, folks,
>
> My understanding of hbase within cluster highavailability is to keep 3 copy
> of data(dfs.replication, default is 3). Whenever a region server
> fails(offlline), another regionserver, which contain another copy of the
> data,  will pick up.
>
> Is my understanding correct? In that case, usually how long will take the
> failover to complete, so that the data will be available?
>
> Can I get a couple pointers? or on-line doc? many thanks
>
> Demai
>

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