ca.portal.admin

Re:Re: Maximum Page Size for IDMS Database Files

Discussion created by ca.portal.admin on Jul 18, 2006
I don't know if you're interested but maybe this will be helpful:
I got this from an IBM pamphlet.

CALCULATING THE PAGE SIZE OF AN AREA FOR OPTI?MIZATION.
PER 3380 3390
TRACK
--------------------------------------
1 32764 32764
2 23476 27996
3 15476 18452
4 11476 13680
5 9076 10796
6 7476 8904
7 6356 7548
8 5492 6516
9 4820 5724
10 4276 5064
11 3860 4564
12 3476 4136
13 3188 3768
14 2932 3440
15 2676 3172


J. Wayne Doneker
BAE Systems
York Pa.
717 225 8109
Email: john.doneker@baesystems.com

Dan.Hall@GE.COM 7/18/2006 10:38:18 AM >>>
Chris,
You are still limited to 32764 bytes as a page size. Although if you
use
that page size you are wasting a lot of DASD. For a 3390, the track
size
is 56664 bytes, so the optimum page size would be 27996. This would
allow 2 pages per track. If you used the max of 32764 you only get 1
page per track and you have wasted space of almost 24K bytes per track.



Dan Hall
GE
Capital Solutions
Danbury, CT

T 513.217.5060
E dan.hall@ge.com
http://www.ge.com/capitalsolutions/

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