You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@hbase.apache.org by oc tsdb <oc...@gmail.com> on 2013/12/05 13:58:10 UTC

HBase snapshot export - mappers

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

Re: HBase snapshot export - mappers

Posted by "xia.internet@gmail.com" <xi...@gmail.com>.
unsubscribe

On Dec 5, 2013, at 7:58 AM, oc tsdb 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

Re: HBase snapshot export - mappers

Posted by oc tsdb <oc...@gmail.com>.
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 <th...@gmail.com>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 <oc...@gmail.com> 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
> >
>

Re: HBase snapshot export - mappers

Posted by Matteo Bertozzi <th...@gmail.com>.
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 <oc...@gmail.com> 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
>