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HBase, mail # user - HBase snapshot export - mappers


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Re: HBase snapshot export - mappers
oc tsdb 2013-12-06, 10:14
Hi,
That means if i have cluster with 5 data nodes,i can have mappers upto 5.
more mappers means more throughput.
Am I correct?

Thanks
-OC

On Thu, Dec 5, 2013 at 7:31 PM, Matteo Bertozzi <[EMAIL PROTECTED]>wrote:

> to make it simple, the number of mappers is the number of "machines" that
> you want to use.
> each machine will get N files to copy based on: total files to export /
> nmappers
>
> Matteo
>
>
>
> On Thu, Dec 5, 2013 at 12:58 PM, oc tsdb <[EMAIL PROTECTED]> wrote:
>
> > Hi,
> >
> >
> > While exporting HBase snapshots we need to specify number of mappers to
> use
> > as mentioned below.To get better performance how many mappers can be used
> > and please let us know based on which parameters we need to decide on
> > number of mappers to use.I am new to HBase.
> >
> > Please refer if there are good link on this.
> >
> > $ bin/hbase class org.apache.hadoop.hbase.snapshot.tool.ExportSnapshot
> > -snapshot MySnapshot -copy-to hdfs:///srv2:8082/hbase -mappers 16
> >
> >
> > Thanks
> > -OC
> >
>