Fast intersystem page transfer in a data sharing environment wit

Details Fast intersystem page transfer in a data sharing environment wit Fast intersystem page transfer in a data sharing environment wit

1993-05-11

1994-07-05

Ray, Gopal C.

Boots, shoes, and leggings

3642821, 3642468, 3642443, 364DIG1, G06F 1540

Patent

active

053275560

ABSTRACT:
A fast technique for transferring units of data between transaction systems in a shared disk environment. The owning system, having updated the page, generates a version number for the page which is stored with a lock possessed by the owning system. When a requesting system seeks a record on the page, its request for a lock illicit an indication that a more recent version of the page is required in the local memory. The buffer management component of a DBMS, with assistance from the lock management, triggers a memory to memory transfer of the page from the owning DBMS to the requesting DBMS using a low overhead communication protocol. The transfer of page is without disk I/O or the log I/O for the updates made to the page.

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