On Monday, 03/09/2009 at 02:15 EDT, Kris Buelens <[email protected]> wrote: > - VSAM has the ability to store (replicate?) the lowest level index > set in front of the track where the data reside. This to avoid seek, > the idea was that the higher level index blocks would be buffered in > storage. But, who cares/who has time nowadays to get that last bit of > performance improvement. > - our own beloved VM has one function not working on FBA... Please > guess.... The x-link part of CSE needs CKD. The locking mechanism > doesn't need Reserve/Release. With one, complex, I/O the XLINK SW is > able to test if a cylinder is free for e.g. a R/W LINK and if so, mark > it as being used. Kind of TestAndSwap. Impossible on FBA I've been > told.
"Impossible" is just hyperbole for "No one ever did the work." See that faint glow on the distant horizon? That's the visible energy given off by elves turning the "Impossible" into "Reality." Alan Altmark z/VM Development IBM Endicott
