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HBase >> mail # user >> [Question: replication] why only one regionserver is used during replication? 0.94.9


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Re: [Question: replication] why only one regionserver is used during replication? 0.94.9
J-D, thanks for the tip.
On Tue, Aug 27, 2013 at 11:40 AM, Jean-Daniel Cryans <[EMAIL PROTECTED]>wrote:

> Region servers replicate data written to them, so look at how your regions
> are distributed.
>
> J-D
>
>
> On Tue, Aug 27, 2013 at 11:29 AM, Demai Ni <[EMAIL PROTECTED]> wrote:
>
> > hi, guys,
> >
> > I am using hbase 0.94.9. And setup replication from a 4-nodes master(3
> > regserver) to a 3-nodes slave(2 regserver).
> >
> > I can tell that all source regservers  can successfully replicate data.
> > However, it seems for each particular table, only one regserver will
> handle
> > its replication at each given table.
> >
> > For example, I am using YCSB to load 1,000,000 rows with workloada, with
> 16
> > threads. During the load period, I looked at the ageOfLastShippedOp and
> > sizeOfLogQueue. I can tell one of the regserver from Master is doing the
> > replication. While values of both age and sizeOfLog are growing, another
> > two regserver doesn't come into help.
> >
> > So does that mean: for each table and process, only one regionserver will
> > do the replication regardless how long the queue is? Or did I miss some
> > setup configuration?
> >
> > Thanks.
> >
> > Demai
> >
>