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From "Edward J. Yoon" <edwardy...@apache.org>
Subject Re: Why "Integer Counters" function is emphasized in BigTable ?
Date Thu, 14 Aug 2008 06:44:47 GMT
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Salesman, Edward

On Thu, Aug 14, 2008 at 3:28 PM, Edward J. Yoon <edwardyoon@apache.org> wrote:
> As i mentioned, I don't know well. But, I think There is no reason to
> store the time series count data somewhere because each time we've
> gotten a different count. We just need the AbstractTable as a crushed
> flat as row by column 2d matrix.
>
> V^T is a historical vector of person. I just guess it is related with
> BigTable and others. If you want to see that formula, see
> http://blog.udanax.org/2008/08/googles-personalized-page-ranking.html
>
> -Edward
>
> On Thu, Aug 14, 2008 at 2:42 PM, Dai Tan <dyerac@gmail.com> wrote:
>> Not yet. Can you give me something about the algorithm?
>>
>> You mean the counting requirements in Google applications is huge so
>> "Integer Counter" function is necessary for BigTable? And "V^T on the google
>> personalization web page rank algorithm" is a good example?
>>
>> I know the "Integer Counter" function is convenient as the add or decrease
>> operation would be atomic. I wonder is there any other benefit of it?
>>
>> On Thu, Aug 14, 2008 at 1:25 PM, Edward J. Yoon <edwardyoon@apache.org>wrote:
>>
>>> Have you seen the V^T on the google personalization web page rank
>>> algorithm?
>>>
>>> -Edward
>>>
>>> On Thu, Aug 14, 2008 at 2:16 PM, Edward J. Yoon <edwardyoon@apache.org>
>>> wrote:
>>> >> I find Hbase will implement "Integer Counter" in future release version.
>>> So
>>> >> could anyone tell me the importance of "Integer Counter" and its common
>>> >> usages? I would really appreciate that.
>>> >
>>> > I don't know well about Hbase roadmap and 'Integer Counters'. But, I
>>> > guess It will be useful for counting the number of times something
>>> > happened. And, It means that the data used for numeric processing.
>>> >
>>> > -Edward
>>> >
>>> > On Thu, Aug 14, 2008 at 1:07 PM, Dai Tan <dyerac@gmail.com> wrote:
>>> >> Dear all:
>>> >>
>>> >> Hi, I am very interested in BigTable's theories and design. I was
>>> confused
>>> >> by the "Integer Counter" function mentioned in BigTable paper when I
>>> read
>>> >> it. I think this function is not hard to implement and may be useful
for
>>> >> many application. But I believe there would be other significant usages
>>> for
>>> >> "Integer Counters" because it is emphasized as one of the three basic
>>> >> functions of BigTable.
>>> >>
>>> >> I find Hbase will implement "Integer Counter" in future release version.
>>> So
>>> >> could anyone tell me the importance of "Integer Counter" and its common
>>> >> usages? I would really appreciate that.
>>> >>
>>> >> I attach the segment of "Integer Counter" in BigTable paper as below:
>>> >>
>>> >> "Bigtable supports several other features that allow the
>>> >> user to manipulate data in more complex ways. First,
>>> >> Bigtable supports single-row transactions, which can be
>>> >> used to perform atomic read-modify-write sequences on
>>> >> data stored under a single row key. Bigtable does not currently
>>> >> support general transactions across row keys, although
>>> >> it provides an interface for batching writes across
>>> >> row keys at the clients. *Second, Bigtable allows cells
>>> >> to be used as integer counters*. Finally, Bigtable supports
>>> >> the execution of client-supplied scripts in the address
>>> >> spaces of the servers. The scripts are written in a
>>> >> language developed at Google for processing data called
>>> >> Sawzall"
>>> >>
>>> >> --
>>> >> Best Regards.
>>> >> -----------
>>> >> Dai Tan
>>> >> School of Computer Science and Technology
>>> >> Huazhong University of Science and Technology (HUST)
>>> >> Wuhan, 430074, China
>>> >> Email: dyerac@gmail.com
>>> >>
>>> >
>>> >
>>> >
>>> > --
>>> > Best regards, Edward J. Yoon
>>> > edwardyoon@apache.org
>>> > http://blog.udanax.org
>>> >
>>>
>>>
>>>
>>> --
>>> Best regards, Edward J. Yoon
>>> edwardyoon@apache.org
>>> http://blog.udanax.org
>>>
>>
>>
>>
>> --
>> Best Regards.
>> -----------
>> Dai Tan
>> School of Computer Science and Technology
>> Huazhong University of Science and Technology (HUST)
>> Wuhan, 430074, China
>> Email: dyerac@gmail.com
>>
>
>
>
> --
> Best regards, Edward J. Yoon
> edwardyoon@apache.org
> http://blog.udanax.org
>



-- 
Best regards, Edward J. Yoon
edwardyoon@apache.org
http://blog.udanax.org

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