W dniu 08.03.2021 o 18:42, Paul Gilmartin pisze:
On Mon, 8 Mar 2021 11:15:56 -0600, Nigel Morton wrote:
Have you considered using extended format sequential striped data sets?
Define using a data class with DSNTYPE set to require or request extended
format; control the number of stripes (which are read in parallel) using a
storage class with a non-zero sustained data rate attribute. Choosing the value
of the sustained data rate is a little clumsy but, in brief, 8 gives two
stripes and 12 gives 3 stripes for 3390 device geometry.
Last time I looked, the throughput scaled roughly linearly with the number of
stripes.
I stand corrected vis-à-vis my pessimism:
On Sun, 7 Mar 2021 15:42:33 -0600, Paul Gilmartin wrote:
...
Don't know about striped RAID. I suspect there's no software support
for the desirable parallel I/O.
Are such data sets compatible with Classic utilities such as IEBGENER
or Assembler programs using QSAM?
Striped PS datasets (extended format PS) are managed by IEBGENER,
ICEGENER or IDCAMS as regular (non-striped) datasets. I mean user
perspective.
--
Radoslaw Skorupka
(looking for new job)
Lodz, Poland
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