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Is there some good reference for those theory?
Posted: 25 January 2012 10:08 PM   Ignore ]  
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Hello,

anybody knows what kind of theory is in behind for those article below?

Theoretically, an Infobright table can go up to 147 trillion rows, but practically, 50 billion is the limit today – a count which greatly depends on the data row size and datatypes used (i.e. the row limit could go higher depending on the row size).

http://www.nileshpawar.com/mysqlexpert/2011/06/data-warehousing-with-mysql-and-infobright/

any help will be great and welcome.

Best regards,

Shingo

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Posted: 26 January 2012 05:48 AM   Ignore ]   [ # 1 ]  
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Hi !

Please notice:

Internationalization support is lacking right now; UTF8 support planned first half of 2009.

So the article is rather old and outdated.

50 billion is the limit today

not quite:

Server version5.1.14-log build number (revision)=IB_3.3.0_r6457_6503(iee commercial)

Type 'help;' or '\h' for helpType '\c' to clear the buffer.

mysqlselect count(*) as records
    -> 
cast(count(*)/1000000 as unsigned) as millions
    -> 
cast(count(*)/1000000000 as unsigned) as billions
    -> 
cast(count(*)/1000000000000 as unsigned) as trillions 
    
-> from nines;
+---------------+----------+----------+-----------+
records       millions billions trillions |
+---------------+----------+----------+-----------+
1000000000000 |  1000000 |     1000 |         
+---------------+----------+----------+-----------+
1 row in set (1.53 sec

greatly depends on the data row size

I’ve never heard about it and I cannot confirm that

.. and datatypes used

Indeed, for some string columns their metadata can grow so much that a memory manager will have troubles allocating large memory chunks for them. One can construct such a case. Also, one can avoid it.

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Posted: 26 January 2012 07:22 PM   Ignore ]   [ # 2 ]  
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Hi Janusz,

Thanks for your comment.

Yes, those article are rather old, however, any other reference source is not in public ...

> 50 billion is the limit today
not indeed, however, those other mysql engine is clearly defined their maximum
size limitation below.

http://dev.mysql.com/doc/refman/5.0/en/table-size-limit.html

is there any good reference for infobright table size limitation, just like above??

Best regards,

Shingo

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