Hi,
What is Data Spaces mapping for VSAM files? We have heard about this from an expert at my shop who refused to give any further pointers on it. Any direction will be great on this! Thanks for your help.
What is Data Spaces mapping for VSAM files?
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Re: What is Data Spaces mapping for VSAM files?
not much of an expert IMNSHOWe have heard about this from an expert at my shop who refused to give any further pointers on it.
Vsam data space belong to the early times of Vsam mvs architecture
OUT ( once upon a time )
the catalogs where NOT icl catalogs and all the sam allocations ( rough approach ) were done using a sub allocation technique
out of a data space ...
so the steps to define a CLUSTER were
define a dataspace on a volume
define a cluster inside the data space
at that time using vsam vas a bit more complicated than it is nowadays
for example, there was something called the ownership bit and a volume was owned by a single catalog
so for a complex/large environment the allocation planning was a bit more complicated
define how many catalogs to use assign to a catalog a set of volumes and so on...
cheers
enrico
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort
enrico
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort
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