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Three-phase commit protocol
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<p>In <a href="/facts/Computer_networking/3w5RM99p">computer networking</a> and distributed <a href="/facts/Database/VYcpkevb">databases</a>, the three-phase commit protocol (3PC) is a <a href="/facts/Distributed_algorithm/S35ydYjK">distributed algorithm</a> that ensures all nodes in a <a href="/facts/Distributed_system/o5nyhqTF">system</a> agree to <a href="/facts/Commit_(data_management)/IVEf4gLc">commit</a> or abort a <a href="/facts/Database_transaction/q1Etrsl8">transaction</a>. It improves upon the <a href="/facts/Two-phase_commit_protocol/oToFXbSw">two-phase commit protocol</a> (2PC) by eliminating the possibility of indefinite blocking caused by a specific type of failure during the commit phase. </p>