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Posted to user@hbase.apache.org by Rita <rm...@gmail.com> on 2011/09/26 11:03:32 UTC
exporting a table
Is there a performance boost to export a table while its disabled?
--
--- Get your facts first, then you can distort them as you please.--
Re: exporting a table
Posted by Jean-Daniel Cryans <jd...@apache.org>.
The job is distributed, but each task is single threaded. That's the
MapReduce model :)
J-D
On Mon, Sep 26, 2011 at 4:45 PM, Rita <rm...@gmail.com> wrote:
> thanks. I noticed the MR job is single threaded. Is table export a serial
> based job or can it be done in parallel?
>
>
>
> On Mon, Sep 26, 2011 at 12:41 PM, Jean-Daniel Cryans <jd...@apache.org>wrote:
>
>> If by "export" you refer to the Export MR job that's shipped with
>> HBase, then it's not going to work at all since the table is disabled.
>>
>> If you refer to a distcp, which would make more sense since by being
>> disabled the table won't get new mutations, then it won't be any
>> faster... just safer.
>>
>> J-D
>>
>> On Mon, Sep 26, 2011 at 2:03 AM, Rita <rm...@gmail.com> wrote:
>> > Is there a performance boost to export a table while its disabled?
>> >
>> > --
>> > --- Get your facts first, then you can distort them as you please.--
>> >
>>
>
>
>
> --
> --- Get your facts first, then you can distort them as you please.--
>
Re: exporting a table
Posted by Rita <rm...@gmail.com>.
thanks. I noticed the MR job is single threaded. Is table export a serial
based job or can it be done in parallel?
On Mon, Sep 26, 2011 at 12:41 PM, Jean-Daniel Cryans <jd...@apache.org>wrote:
> If by "export" you refer to the Export MR job that's shipped with
> HBase, then it's not going to work at all since the table is disabled.
>
> If you refer to a distcp, which would make more sense since by being
> disabled the table won't get new mutations, then it won't be any
> faster... just safer.
>
> J-D
>
> On Mon, Sep 26, 2011 at 2:03 AM, Rita <rm...@gmail.com> wrote:
> > Is there a performance boost to export a table while its disabled?
> >
> > --
> > --- Get your facts first, then you can distort them as you please.--
> >
>
--
--- Get your facts first, then you can distort them as you please.--
Re: exporting a table
Posted by Jean-Daniel Cryans <jd...@apache.org>.
If by "export" you refer to the Export MR job that's shipped with
HBase, then it's not going to work at all since the table is disabled.
If you refer to a distcp, which would make more sense since by being
disabled the table won't get new mutations, then it won't be any
faster... just safer.
J-D
On Mon, Sep 26, 2011 at 2:03 AM, Rita <rm...@gmail.com> wrote:
> Is there a performance boost to export a table while its disabled?
>
> --
> --- Get your facts first, then you can distort them as you please.--
>