Re: Convert SAP Oracle Database to IBM DB2 Database??

From: Serge Rielau <>
Date: Thu, 07 Feb 2008 22:24:01 -0500
Message-ID: <>

DA Morgan wrote:
> Serge Rielau wrote:

>> DA Morgan wrote:
>>> Serge Rielau wrote:
>>>> DA Morgan wrote:
>>>>> Serge Rielau wrote:
>>>>>> DA Morgan wrote:
>>>>>>> My testing of Oracle compression versus DB2 compression indicates 
>>>>>>> that
>>>>>>> DB2 has some catching up to do.
>>>>>> Interesting, care to elaborate? Always thriving to improve...
>>>>>> Given Oracle's DeWitt clause I'll gladly accept any information 
>>>>>> you have by email as to not get you into trouble.
>>>>> Going to have to disappoint you this time for reasons I am sure you 
>>>>> can
>>>>> appreciate.
>>>> So an unsubstantiated claim... Aside you should use DB2 9.5 to 
>>>> compare to Oracle 11
>>> If I'd used Oracle 11 I would have.
>>> But as long as you are actively participating how about a brief
>>> technical presentation from the expert explaining to us how compression
>>> in DB2 differs from that in Oracle 10g and 11g.
>>> Please include also information as to how headers are designed and how
>>> blocks are filled? Top down as in Informix for both Top-Down and
>>> Bottom-Up as in Oracle? Or some other means.
>> Maybe we can also take the discussion there....
>> Cheers
>> Serge

> I would but there is a rather substantial problem: Chris Eaton's
> understanding of Oracle compression appears to not even include
> the marketing materials much less the rather substantial discussion
> of the concepts and architecture.
> What I'm saying is that it is not just superficial ... from a technical
> point-of-view it is mostly incorrect. He needs to learn how to read the
> on-line docs.

Well the nice thing about BLOGs is the ability to give feedback. You are a teacher, no? Teach!


Serge Rielau
DB2 Solutions Development
IBM Toronto Lab
Received on Thu Feb 07 2008 - 21:24:01 CST

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