On Mon, 7 Sep 2015 17:59:22 +0200, Peter Hunkeler wrote: >>What type of dataset? PS, PO, PDSE, ...? The optimal block size for PDSE >>(FB-80, DSNTYPE=LIBRARY) is 32720. > >Yes, its about PDSEs. Kind a makes sense, sure. However I have been using >PDSEs for a long time and don't seem to remeber to have seen this. Must have >been blind (meaning I didn't care to look to carefully), obviously. > And the BLKSIZE is largely fictitious: You can OPEN with any BLKSIZE that's a multiple of 80 and process members without error. I suspect it's saved only to appease legacy programs that require that it be supplied in the label.
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