G
George Potemkin
Guest
First two latches (MT and DB lock) were introduced in Progress V5 released in 1988 (first version that used the shared memory). But the changes made in V6.3 (released in 1991) was, IMHO, a breakthrough. Apart of the separate latches that protect the access to the most shared memory structures we got a watchdog functionality, background writers and a lot of the secret options in promon. ;-) I think it would be right to say that this year is 25 Anniversary of Progress latches and I wish to thank Gus Bjorklund for his excellent work! During the conference in Noordwijk I has made a short introduction to the rather long presentation about the latches. The presentation can be downloaded there: ftp.progress-tech.ru/.../SecretLifeOfLatches.pptx Questions, comments, additions are welcome! Best regards, George
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