In databases and transaction processing, two-phase locking (2PL) is a pessimistic concurrency control method that guarantees conflict-serializability...

other output (if applicable). The two-phase commit (2PC) protocol should not be confused with the two-phase locking (2PL) protocol, a concurrency control...

two-phase locking to guarantee serializability. In addition to shared (S) locks and exclusive (X) locks from other locking schemes, like strict two-phase...

Two-phase may refer to: Two-phase electric power Two-phase commit protocol Two-phase flow Two-phase locking Binary phase, chemical compounds composed of...

A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input...

user A's transaction completes. Two-phase locking is often applied to guarantee full isolation. An alternative to locking is multiversion concurrency control...

serializability). In practice most commercial database systems use strong strict two-phase locking (SS2PL) for concurrency control, which ensures global serializability...

transaction executes in its entirety before another begins. Strict two-phase locking (Strict 2PL) or Serializable Snapshot Isolation (SSI) prevent this...

two-phase lock-in-amplifiers have a second detector, doing the same calculation as before, but with an additional 90° phase shift. Thus one has two outputs:...

depending on lock type and needed operation). Index Locking Protocol guarantees that phantom read phenomenon won't occur. Index locking protocol states:...

Strong strict Two-phase locking (SS2PL; also called Rigorous scheduling or Rigorous 2PL) which is a special case (variant) of Two-phase locking (2PL). It...

whether a particular locking policy is safe or not. The commonly used two phase locking (2PL) policies consist of two stages – for locking and unlocking entities...

common distributed concurrency control technique is strong strict two-phase locking (SS2PL, also named rigorousness), which is also a common centralized...

since such typically results in a database integrity violation. Two-phase locking is the most common transaction concurrency control method in DBMSs...

term Locks with ordered sharing comprises several variants of the two-phase locking (2PL) concurrency control protocol generated by changing the blocking...

can degrade the performance of phase-locked loops and RF integrated circuits. Injection pulling and injection locking can be observed in numerous physical...

read operation, reading, writing, aborting, committing, requesting a lock, locking, etc. Often, only a subset of the transaction operation types are included...

is zero is called a lock point. Laser locking based on an error signal which is a function of frequency is called frequency locking and if the error signal...

instruments, orbital resonance and tidal locking of orbiting moons, mode-locking in fiber optics and phase-locked loops and other electronic oscillators...

(released in 2014) is fully multi-threaded and supports high performance two-phase locking and MVCC (multiversion concurrency control) transaction control models...

difference in phase between two signal inputs. The phase detector is an essential element of the phase-locked loop (PLL). Detecting phase difference is...

by other architectures. Firebird index buckets aren't subject to two-phase locking, and boolean "and" and "or" operations can be performed on intermediate...

estate See also Database-centric architecture Intelligent database Two-phase locking Locks with ordered sharing Load file Publishing Halloween Problem...

generalizes the popular strong strict two-phase locking (SS2PL) property, which in conjunction with the two-phase commit protocol (2PC), is the de facto...

appears natural to users and which goes beyond simple record keeping. Two-phase locking (2PL) – is a concurrency control method that guarantees serializability...

concurrency control (MVCC), deterministic concurrency control, and two-phase locking (deadlock detection). Ingres supports four isolation levels, from...

Charge-pump phase-locked loop (CP-PLL) is a modification of phase-locked loops with phase-frequency detectors and square waveform signals. A CP-PLL allows...

channel. A frequency-locked loop is similar to a phase-locked loop (PLL), but only attempts to control the derivative of phase, not the phase itself. Because...

locking. The metal conductive blades are often informally called prongs (as in 3-prong plug). Numbers prefixed by 'L' are curved-blade, twist-locking...

lunar phase or Moon phase is the apparent shape of the Moon's directly sunlit portion as viewed from the Earth. Because the Moon is tidally locked with...