Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

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


Copy link to this message
-
Re: [Question: replication] why only one regionserver is used during replication? 0.94.9
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
>