May 2024
Intermediate to advanced
325 pages
12h 2m
English
Content preview from Distributed Database Systems, 1st Edition by Chhanda Ray
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Distributed Database Systems
When all SQL statements of the same application program have been compiled by all apprentice
sites, the master requests the transaction manager to commit the compilation considering it as an
atomic unit. Here the two-phase commit protocol is used to ensure that the compilation is successful
at all sites or at none at all.
Execution – In this step, plans sent to all apprentices in the compilation step are retrieved and
executed. The master sends execute requests to all apprentices, which in turn may send the same
request to their subordinates, thereby activating a tree of processes. Each intermediate-level pro- ...
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