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05319 - Database Size for ASCII version

05319 - Database Size for ASCII version

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Database Size for ASCII version

Quick question on this.

If you migrate off the AS400/iseries to NT or Unix can you expect the same
growth/sizing?

-----Original Message-----
From: Gueldenpfennig, Volker [mailto:volker.gueldenpfennigZs...]
Sent: Saturday, March 09, 2002 2:18 AM
To: 'Jim Doll '
Cc: 'DoNotReply@consolut.eu'
Subject: RE: Database Size for ASCII version


Hi Jim,

Yes, you are right. The numbers are still "packed".
That means, we do not change any decimal or binary representations in the
system. This is not necesary for Unicode. Unicode only changes the
representation of charcter fields.
As SAP has in R3 about 2/3 of the data stored in character fields, the
database grows by about +66% when transfering to the ASCII solution, which
means, that all transparent tables (with latin-1) represent full unnicode
already. This will improve in pure latin-1 systems the migration to unicode
a lot, because only the pool- and cluster-tables will have to be converted
to unicode then.

In BW a large part of the data resides in the fact tables. These tables only
contain numeric data. This is because we do only use artificial keys here.
Because of this, these tables won't grow at all. That's why the increase of
BW databases is less (about +50%) than for R3 databases.

ope this clarifies your questions, oterwise, please let me know. I think it
is necessary, that this is fully understood.

Regards

Volker

-----Original Message-----
From: Jim Doll
To: Gueldenpfennig, Volker
Sent: 08.03.02 23:15
Subject: RE: Database Size for ASCII version

Someday, I'll have to have someone explain this to me.... If it is
basically a double-byte character set, why isn't it twice as big? Are
numbers still "packed", and only take a half-byte per number?

>>> volker.gueldenpfennigZs... 03/08/02 02:43AM >>>
Hi Jay,

you can expect for R3 a 70% bigger database in ASCII. For BW it is about
+50% .

For the other types of systems I don't have real experiences by now, but
I
would guess in the area of 70% .

Regards

Volker



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