hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "edward yoon" <edw...@udanax.org>
Subject Re: why read HBase in map function is so slow?
Date Sat, 02 Feb 2008 00:13:19 GMT
I have a one question.
Increased map number would be bring up more speed?

On 2/2/08, stack <stack@duboce.net> wrote:
> Are you making the HTable instance every time you do a get?  If so,
> that'll cost.
> St.Ack
>
>
> ma qiang wrote:
> > About more than twice. I guess the  time of connect to table is too large .
> >
> >
> >
> > On Feb 1, 2008 8:15 PM, edward yoon <edward@udanax.org> wrote:
> >
> >> How long does it take to get the row data from table?
> >>
> >>
> >> On 2/1/08, ma qiang <maqiang1984@gmail.com> wrote:
> >>
> >>> Hi all:
> >>>     I have a mapreduce program now, and in my map function I need use
> >>> some parameters which read from another table in HBase using HTable
> >>> class , as a result I find the this program run so slow. Who can tell
> >>> me why and how to solve this problem?
> >>>    Thank you very much!
> >>>    Best Wishes!
> >>>
> >>>
> >> --
> >> B. Regards,
> >> Edward yoon @ NHN, corp.
> >>
> >>
>
>


-- 
B. Regards,
Edward yoon @ NHN, corp.

Mime
View raw message