On Mon, 10 Jun 2013 17:43:58 +0000, DASDBILL2 wrote: > >Spanned means that a single logical record might span multiple physical >blocks, but the way it is implemented results in having all block sizes be the >same, except for possibly the last one, which might be short. > Is uniform lengths a requirement? Do any applications rely on being able to calculate a cylinder and track address within a VBS data set? Is any error reported if an interior block is short? Does this mean one can't append (MOD) to a VBS data set? What happens if after writing the last segment of a logical record the block is not filled up to BLKSIZE but fewer bytes are available than the length of a SDW? I suppose using null segments might relax some of these constraints. By "the way it is implemented" are you referring to the behavior of QSAM?
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