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From "Ding, Hui" <hui.d...@sap.com>
Subject RE: correct performance evaluation results?
Date Tue, 28 Oct 2008 22:15:20 GMT
How much data do you have in the whole instance?
Did you have anything recently written (so that they are in memcache)?
Love to see more details.
Thx! 

-----Original Message-----
From: Krzysztof Szlapinski [mailto:krzysztof.szlapinski@starline.hk] 
Sent: Tuesday, October 28, 2008 3:11 PM
To: hbase-user@hadoop.apache.org
Subject: Re: correct performance evaluation results?

stack pisze:
> Yeah.  Unless you got some magic going on in that Xeon of yours.
No magic noticed ;)
But 4 real - Any ideas why the scan test goes wrong? I got no warnings, 
no errors, nothing suspicious in the log files. It starts and ends 
within aprox. 40ms.

krzysiek

> St.Ack
>
>
> Krzysztof Szlapinski wrote:
>> stack pisze:
>>> Your math looks wrong.
>>> St.Ack
>>>
>> Hm, I double checked and it seems OK
>> Maybe the confuson is caused by the use of wrong decimal sparator in 
>> my results (the Polish way ;) ). So once again its:
>>                                no of rows      miliseconds
rows/sec
>> sequential writes        2097140            408641     ~5132
>> scan                          2097140                    40     
>> ~52428500
>> random read              4194280            843962    ~4970
>>
>> scan results seems tooooooo good ;)
>>
>>>
>>> Krzysztof Szlapinski wrote:
>>>> hi
>>>> I've run the perormance evaluation test on a two machine cluster
>>>>
>>>> hardware:
>>>> dual Xeon E5430 2.66 Ghz, 4GB RAM,
>>>> software:
>>>> OS - 64bit Ubuntu 8.04 Server
>>>> Java 1.6 - 64bit
>>>> Hadoop - 0.18.1
>>>> HBase - 0.18.0
>>>>
>>>> Below are the results - the scan test result seems not real - could

>>>> someone please confirm that such result is credible
>>>>
>>>>
>>>>     no of rows      miliseconds     rows/sec
>>>> sequential writes     2097140     408641     5 131,99
>>>> scan     2097140     40     52 428 500,00
>>>> random read     4194280     843962     4 969,75
>>>>
>>>>
>>>>
>>>>
>>>> krzysiek
>>>>
>>>
>>>
>>
>
>


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