Hi.
Everybody talks about performance and maintenance.
But, what about fragility?
Years ago we move towards dynamic files.
But many of our customer's servers didn't have UPS.
So, a single storm or power supply failure could result in file corruption.
Today we don't have dynamic files at all, except from those servers that are
hosted in a very well conditioned environment.
And yes, the resize of static files is absollutly necessary. We do it with a
self made basic program. But we do it at night, because we had bad
experiences with the CONCURRENT clause.
By the way, could someone tell me from wich release of UniVerse the
CONCURRENT clause is sure enough?
Thanks,
______________________________
Augusto Alonso
I.T. Manager
Quiter Servicios Centrales
Tel: +34 902 23 33 23
Fax: +34 902 23 42 80
[EMAIL PROTECTED]
www.quiter.com
______________________________
----- Original Message -----
From: "Ray Wurlod" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, July 25, 2008 7:51 AM
Subject: Re: [U2] static/dynamic file(s) opinions wanted!
UniVerse Dynamic files do NOT resize every time they split. They only
"resize" a single group at each split.
The next group to split is allocated on a round robin basis from group
number 1 up to the group number that is the highest power of 2 less than
or equal to the current modulus. So, for a large dynamic file, it can be
a long interval between when a group is "resized" and the next time it is
"resized". This is why we advocate resizing Dynamic files periodically.
Yes, they will work OK if you don't.
----- Original Message -----
From: "JPB-U2UG" <[EMAIL PROTECTED]>
To: [email protected]
Subject: Re: [U2] static/dynamic file(s) opinions wanted!
Date: Thu, 24 Jul 2008 22:23:51 -0500
Tom, The point is that it doesn't work with dynamic files.
David, I don't really think you need to resize dynamic files
because they are always resizing themselves, unless they are not
changing size. This type of resizing is equivalent to defragging on
a windows system. Since dynamic files resize every time they split
then it is not necessary.
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