A B S T R A C TThis paper presents a new read-only optimization called the unsolicited update-vote that when combined with the presumed commit protocol (PrC), eliminates all the logging activities from PrC for read-only transactions and significantly reduces them for partially read-only ones.
We identify one of the incompatibility problems associated with atomic commit :protocols that prevents them from being used together and wei derive a correctness criterion that captures the correctness of their integration. We also present a new atomic commit Iprotocol, called Presumed Any, that integrates the three commonly known two-phase commit protocols and prove its correctness.
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