ref:
http://www.garlic.com/~lynn/2006w.html#10 long ago and far away, vm370 from
early/mid 70s
while only a small subset of the virtual memory management stuff was released as
DCSS vm370 ... and none of the cms paged mapped filesystem stuff ... a little
more of the virtual memory management stuff was used for the original
relational/sql
implementation in system/r ..... which provided r/w (unprotected) shared
segments
between semi-privileged processes (different system/r database tasks running in
different virtual addresss spaces).
misc. past posts mentioning system/r work
http://www.garlic.comm/~lynn/subtopic.html#systemr
It was also part of the technology transfer of system/r to endicott for what was to become sql/ds.
This addition feature took on the name DWSS (or dynamic writeable shared segments) ... and
there was lots of issues on whether or not it impacted ECPS and microcode on
existing customer machines.
recent posts mentioning system/r and DWSS
http://www.garlic.com/~lynn/2006t.html#16 Is the teaching of non-reentrant
HLASM coding practices ever defensible?
http://www.garlic.com/~lynn/2006t.html#39 Why these original FORTRAN quirks?
recent posts on early virtual memory management stuff (a small subset which was
going to be released as DCSS in vm370 release 3)
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?
http://www.garlic.com/~lynn/2006w.html#9 dcss and page mapped file system
i also worked on a semantic network related activity about the same time as the
system/r stuff
which used more of the virtual memory management and page mapped technology ...
recent reference
http://www.garlic.com/~lynn/2006v.html#48 Why so little parallelism?
