Yes, of course!
9 will be blocked to 3x3.
However for VSAM it is possible to get 9 blk/trk, as well as 4, 12, 10,
8...
Of course it is not the same as SDB for PS file.
--
Radoslaw Skorupka
(looking for new job)
Lodz, Poland
W dniu 02.03.2021 o 15:33, Paul Gilmartin pisze:
On Tue, 2 Mar 2021 15:25:33 +0100, Radoslaw Skorupka wrote:
try any RECFM=FB and LRECL between 13349 and 18118
Generally it may be 1/3 or other 1/n where n is odd (uneven).
It must be either prime or 1.
Has anyone an example for 1/11?
(Always assuming Blocked.)
As currently unemployed I have no z/OS at hand (OK, I have one due to
someone's kindness), when you play with large enough LRECLs you will get
SDB at 3 blk/trk, 5 blk/trk, 7 blk/trk and maybe more.
Why is it so unpopular?
Because usually we use shorter LRECLs.
To be honest I found it accidentally when preparing excercises for VSAM
course. Default CISZ on 3390 is 18432 and physical block is also 18432,
and it is the most effective usage of track (least space unassigned to
any CI).
-- gil
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