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HBase, mail # user - Slow scan request with basic test ?


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Re: Slow scan request with basic test ?
Jean-Marc Spaggiari 2013-06-14, 15:19
That's not a normal behavior.

Have you configured your hosts file? I think you did since it's
working fine. Are you running into a VM on your laptop? Or directly on
the laptop? Anything else is running at the same time? Also, can you
take a look into the logs and see if there is anything displayed?

Thanks,

JM

2013/6/14 Simon Majou <[EMAIL PROTECTED]>:
> Hi,
>
> I am using the latest stable (0.94.8), I have a i3 laptop with a SSD.
>
> I am doing the basic test of the documentation :
> http://hbase.apache.org/book/quickstart.html#shell_exercises
>
> hbase(main):003:0> create 'test', 'cf'
> 0 row(s) in 1.2200 seconds
> hbase(main):003:0> list 'test'
> ..
> 1 row(s) in 0.0550 seconds
> hbase(main):004:0> put 'test', 'row1', 'cf:a', 'value1'
> 0 row(s) in 0.0560 seconds
> hbase(main):005:0> put 'test', 'row2', 'cf:b', 'value2'
> 0 row(s) in 0.0370 seconds
> hbase(main):006:0> put 'test', 'row3', 'cf:c', 'value3'
> 0 row(s) in 0.0450 seconds
>
>
> Here is what I got :
>
> create 'test', 'cf'
> create 'test', 'cf'
> 0 row(s) in 9.1360 seconds
>
> list 'test'
> list 'test'
> TABLE
> test
> 1 row(s) in 0.0280 seconds
>
> put 'test', 'row1', 'cf:a', 'value1'
> put 'test', 'row1', 'cf:a', 'value1'
> 0 row(s) in 4.6200 seconds
>
> put 'test', 'row2', 'cf:b', 'value2'
> put 'test', 'row2', 'cf:b', 'value2'
> 0 row(s) in 0.0080 seconds
>
> put 'test', 'row3', 'cf:c', 'value3'
> put 'test', 'row3', 'cf:c', 'value3'
> 0 row(s) in 0.0060 seconds
>
> scan 'test'
> scan 'test'
> ROW  COLUMN+CELL
>  row1 column=cf:a, timestamp=1371222264939, value=value1
>  row2 column=cf:b, timestamp=1371222269032, value=value2
>  row3 column=cf:c, timestamp=1371222275823, value=value3
> 3 row(s) in 4.5920 seconds
>
>
> It seems to have some ~4.5s latency, appearing 2x when creating a table,
> and appearing on the first put and on scans.
>
> Simon
>
>
> Simon
>
>
> On Fri, Jun 14, 2013 at 5:07 PM, Jean-Marc Spaggiari <
> [EMAIL PROTECTED]> wrote:
>
>> Hi Simon,
>>
>> Can you please provide more details? Which version are you testing
>> with, what is the test you are doing, on what kind of computer this is
>> running?
>>
>> Thanks,
>>
>> JM
>>
>> 2013/6/14 Simon Majou <[EMAIL PROTECTED]>:
>> > Hello,
>> >
>> > When doing the basic test after installing, the scan request is really
>> slow
>> > (~5sec). There are no errors in the logs. Is it normal ? Why it is so ?
>> >
>> > Simon
>>