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From Doug Meil <doug.m...@explorysmedical.com>
Subject Re: Hbase Performance Issue
Date Mon, 06 Jan 2014 19:14:21 GMT

In addition to what everybody else said, look what *where* the regions are
for the target table.  There may be 5 regions (for example), but look to
see if they are all on the same RS.

On 1/6/14 5:45 AM, "Nicolas Liochon" <nkeywal@gmail.com> wrote:

>It's very strange that you don't see a perf improvement when you increase
>the number of nodes.
>Nothing in what you've done change the performances at the end?
>You may want to check:
> - the number of regions for this table. Are all the region server busy?
>you have some split on the table?
> - How much data you actually write. Is the compression enabled on this
> - Do you have compactions? You may want to change the max store file
>settings for unfrequent write load (see
>It would be interesting to test as well the 0.96 release.
>On Sun, Jan 5, 2014 at 2:12 AM, Vladimir Rodionov
>> I think in this case, writing data to HDFS or HFile directly (for
>> subsequent bulk loading)
>> is the best option. HBase will never compete in write speed with HDFS.
>> Best regards,
>> Vladimir Rodionov
>> Principal Platform Engineer
>> Carrier IQ, www.carrieriq.com
>> e-mail: vrodionov@carrieriq.com
>> ________________________________________
>> From: Ted Yu [yuzhihong@gmail.com]
>> Sent: Saturday, January 04, 2014 2:33 PM
>> To: user@hbase.apache.org
>> Subject: Re: Hbase Performance Issue
>> There're 8 items under:
>> http://hbase.apache.org/book.html#perf.writing
>> I guess you have through all of them :-)
>> On Sat, Jan 4, 2014 at 1:34 PM, Akhtar Muhammad Din
>> <akhtar.mdin@gmail.com>wrote:
>> > Thanks guys for your precious time.
>> > Vladimir, as Ted rightly said i want to improve write performance
>> currently
>> > (of course i want to read data as fast as possible later on)
>> > Kevin, my current understanding of bulk load is that you generate
>> > StoreFiles and later load through a command line program. I dont want
>> do
>> > any manual step. Our system is getting data after every 15 minutes, so
>> > requirement is to automate it through client API completely.
>> >
>> >
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