On Thu, 19 Apr 2012 16:50:44 +0200, Michael Klaeschen wrote: > >locking mechanisms are just convention for well-behaving processes and do >not guarantee exclusive use. > >IMHO, POSIX and common Unix implementations just don't offer exclusive >control as found in MVS (i.e. GRS). May be you can use ISGENQ to obtain an >enqueue for Unix resources -- but beware of being overconfident. > Likewise, MVS ENQ via GRS is just a convention for well-behaving address spaces. I can do an IEBCOPY compress with the data set allocated SHR while other jobs also have it SHR. That's been suggested to me when I can't get the other job to free it. I avoid doing it; I don't consider it well-behaving.
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