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HBase >> mail # user >> hbase regionserver fail over -- how long it will take?


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Re: hbase regionserver fail over -- how long it will take?
Ted,

Thanks a lot. I will look into it

Demai on the run

On Sep 20, 2013, at 8:44 PM, Ted Yu <[EMAIL PROTECTED]> wrote:

> 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 <[EMAIL PROTECTED]> 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
>>