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How many times secondary space allocated?
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Answer / e s hudders
The answer is it depends. A VSAM file can have up to 123 extents in VSE and up to 255 in MVS. This is by component, that is index and data. Any time that a primary or secondary is allocated, VSAM can satisfy this request in up to 5 extents. Each extent counts towards the maximum. So, if for some reason you requested 500 cylinders and VSAM satisfied this request with 5 separate extents that total the 500 cylinders, then you have to subtract this number from the maximum allowed. The same applies to a secondary allocation. So, although in theory you could say that you could have the maximum allowed minus 1 (for the primary), in reality it could be less. Also, remeber that if you have multi-volumes allocated, you would get a primary allocation on the new volume when there is no space for the secondary on the current volume. This would not apply for a VSAM data set defined using SMS in MVS where you can request that the secondary allocation be applied to a new volume.
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Answer / satya
122 times in vsam as for exm: cyl(2 2) it means it takes 2tracks as primary and 5*122 times as secondary after completion of the first space in primary it goes for secondary for 1st time as on...up to 122 times
but in JCL cyl(2 2)---> 2+2*15 it takes 15times
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Answer / k.pramod reddy
syn:
space allocated 1600 tracks
like that (100*1 + 100*15)---->(p.q,s.q)
so that, secondary space allocated 15 times
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