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HBase, mail # user - Loading data, hbase slower than Hive?


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Austin Chungath 2013-01-17, 16:44
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Michael Segel 2013-01-17, 16:48
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Anoop John 2013-01-17, 17:00
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ramkrishna vasudevan 2013-01-17, 17:09
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Mohammad Tariq 2013-01-17, 17:46
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praveenesh kumar 2013-01-18, 17:57
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Doug Meil 2013-01-18, 18:00
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Asaf Mesika 2013-01-19, 19:50
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Re: Loading data, hbase slower than Hive?
Mohammad Tariq 2013-01-19, 21:12
Hello Austin,

          I am sorry for the late response.

Asaf has made a very valid point. Rowkwey design is very crucial.
Specially if the data is gonna be sequential(timeseries kinda thing).
You may end up with hotspotting problem. Use pre-splitted tables
or hash the keys to avoid that. It'll also allow you to fetch the results
faster.

Warm Regards,
Tariq
https://mtariq.jux.com/
cloudfront.blogspot.com
On Sun, Jan 20, 2013 at 1:20 AM, Asaf Mesika <[EMAIL PROTECTED]> wrote:

> Start by telling us your row key design.
> Check for pre splitting your table regions.
> I managed to get to 25mb/sec write throughput in Hbase using 1 region
> server. If your data is evenly spread you can get around 7 times that in a
> 10 regions server environment. Should mean that 1 gig should take 4 sec.
>
>
> On Friday, January 18, 2013, praveenesh kumar wrote:
>
> > Hey,
> > Can someone throw some pointers on what would be the best practice for
> bulk
> > imports in hbase ?
> > That would be really helpful.
> >
> > Regards,
> > Praveenesh
> >
> > On Thu, Jan 17, 2013 at 11:16 PM, Mohammad Tariq <[EMAIL PROTECTED]
> <javascript:;>>
> > wrote:
> >
> > > Just to add to whatever all the heavyweights have said above, your MR
> job
> > > may not be as efficient as the MR job corresponding to your Hive query.
> > You
> > > can enhance the performance by setting the mapred config parameters
> > wisely
> > > and by tuning your MR job.
> > >
> > > Warm Regards,
> > > Tariq
> > > https://mtariq.jux.com/
> > > cloudfront.blogspot.com
> > >
> > >
> > > On Thu, Jan 17, 2013 at 10:39 PM, ramkrishna vasudevan <
> > > [EMAIL PROTECTED] <javascript:;>> wrote:
> > >
> > > > Hive is more for batch and HBase is for more of real time data.
> > > >
> > > > Regards
> > > > Ram
> > > >
> > > > On Thu, Jan 17, 2013 at 10:30 PM, Anoop John <[EMAIL PROTECTED]
> <javascript:;>
> > >
> > > > wrote:
> > > >
> > > > > In case of Hive data insertion means placing the file under table
> > path
> > > in
> > > > > HDFS.  HBase need to read the data and convert it into its format.
> > > > (HFiles)
> > > > > MR is doing this work..  So this makes it clear that HBase will be
> > > > slower.
> > > > > :)  As Michael said the read operation...
> > > > >
> > > > >
> > > > >
> > > > > -Anoop-
> > > > >
> > > > > On Thu, Jan 17, 2013 at 10:14 PM, Austin Chungath <
> > [EMAIL PROTECTED] <javascript:;>
> > > > > >wrote:
> > > > >
> > > > > >   Hi,
> > > > > > Problem: hive took 6 mins to load a data set, hbase took 1 hr 14
> > > mins.
> > > > > > It's a 20 gb data set approx 230 million records. The data is in
> > > hdfs,
> > > > > > single text file. The cluster is 11 nodes, 8 cores.
> > > > > >
> > > > > > I loaded this in hive, partitioned by date and bucketed into 32
> and
> > > > > sorted.
> > > > > > Time taken is 6 mins.
> > > > > >
> > > > > > I loaded the same data into hbase, in the same cluster by
> writing a
> > > map
> > > > > > reduce code. It took 1hr 14 mins. The cluster wasn't running
> > anything
> > > > > else
> > > > > > and assuming that the code that i wrote is good enough, what is
> it
> > > that
> > > > > > makes hbase slower than hive in loading the data?
> > > > > >
> > > > > > Thanks,
> > > > > > Austin
> > > > > >
> > > > >
> > > >
> > >
> >
>
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Doug Meil 2013-01-20, 15:13
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Vikas Jadhav 2013-01-20, 18:04
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Austin Chungath 2013-01-21, 05:45
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Anoop Sam John 2013-01-21, 05:54
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Austin Chungath 2013-01-21, 06:16
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Mohammad Tariq 2013-01-21, 06:31
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Anoop Sam John 2013-01-21, 06:36
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Mohammad Tariq 2013-01-21, 06:39