On Fri, 2 Jul 2010 08:40:49 -0400, zMan <[email protected]> wrote:
>What is the overall locking mechanism? If program A is reading /some/file >and program B does a rm on it, what happens? From observed behavior, I think >the file doesn't go away until A is done with it. I'm told that: > >Unix uses shared memory and mutex locks to ensure that files are locked >between processes. How was that implemented on z/OS? >...and I'd like to understand it more. Anyone have any pointers? > http://en.wikipedia.org/wiki/Semaphore_(programming) -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:[email protected] Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
