Discussion:
dcss and page mapped filesystem
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Anne & Lynn Wheeler
18 years ago
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the real, original "old way" was with cms & cp supporting cms page mapped
filesystem ... that I had originally done on cp67 and then ported to
vm370. with page mapped filesystem ... then it was straight forward to
have all sort of shared segment feature/function mapped directly to
the stuff in cms filesystem.

they decided to pickup a very small piece of the cms & cp changes for
vm370 release3 and call it DCSS ... lots of past posts with much more
detailed description
http://www.garlic.com/~lynn/subtopic.html#mmap

one of the tricks was an added enhancement that i had done for
location free code ... so memory images could be mapped from
filesystem to arbitrary (possibly shared segment) virtual
addresses. lots of past posts discussing some of the issues
http://www.garlic.com/~lynn/subtopic.html#adcon

later i did an enhancement for the spool file system to operate
similarly ... i needed to speed up the spool system by minimum of
factor of 10 times for VNET participation in HSDT backbone
http://www.garlic.com/~lynn/subnetwork.html#hsdt

recent posts discussing spool file system rewrite
http://www.garlic.com/~lynn/2006e.html#36 The Pankian Metaphor
http://www.garlic.com/~lynn/2006o.html#64 The Fate of VM - was: Baby MVS???
http://www.garlic.com/~lynn/2006p.html#10 What part of Z/OS is the OS?
Anne & Lynn Wheeler
18 years ago
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...
some old cp/cms email from early and mid-70s mentioning original
development
http://www.garlic.com/~lynn/2006v.html#36 Why these original FORTRAN quirks?
http://www.garlic.com/~lynn/2006w.html#7 Why these original FORTRAN quirks?
http://www.garlic.com/~lynn/2006w.html#8 Why these original FORTRAN quirks?
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