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Concurrency control method
In databases and transaction processing, two-phase locking (2PL) is a pessimistic concurrency control method that guarantees conflict-serializability
Two-phase_locking
Computer science transaction algorithm
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_commit_protocol
Topics referred to by the same term
Two-phase may refer to: Two-phase electric power Two-phase commit protocol Two-phase flow Two-phase locking Two-phase servo motor Binary phase, chemical
Two-phase
Robustness properties for database transactions
user A's transaction completes. Two-phase locking is often applied to guarantee full isolation. An alternative to locking is multiversion concurrency control
ACID
Electronic control system
A phase-locked loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the
Phase-locked_loop
In a database, locking objects that contain other objects
two-phase locking to guarantee serializability. In addition to shared (S) locks and exclusive (X) locks from other locking schemes, like strict two-phase
Multiple_granularity_locking
Phenomenon in maths
instruments, orbital resonance and tidal locking of orbiting moons, mode-locking in fiber optics and phase-locked loops and other electronic oscillators
Arnold_tongue
Database transaction between two or more networks
serializability). In practice most commercial database systems use strong strict two-phase locking (SS2PL) for concurrency control, which ensures global serializability
Distributed_transaction
Type of amplifier that emphasizes a specific frequency in a noisy signal
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:
Lock-in_amplifier
Greek-American computer scientist
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
Mihalis_Yannakakis
Measures to ensure concurrent computing operations generate correct results
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
Concurrency_control
Database transaction integrity concept
since such typically results in a database integrity violation. Two-phase locking is the most common transaction concurrency control method in DBMSs
Isolation_(database_systems)
Order of execution of transactions in transaction processing
read operation, reading, writing, aborting, committing, requesting a lock, locking, etc. Often, only a subset of the transaction operation types are included
Database_transaction_schedule
term Locks with ordered sharing comprises several variants of the two-phase locking (2PL) concurrency control protocol generated by changing the blocking
Locks_with_ordered_sharing
Concurrency control technique for databases
generalizes the popular strong strict two-phase locking (SS2PL) property, which in conjunction with the two-phase commit protocol (2PC), is the de facto
Commitment_ordering
Way to produce very short laser bursts
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
Mode_locking
depending on lock type and needed operation). Index Locking Protocol guarantees that phantom read phenomenon won't occur. Index locking protocol states:
Index_locking
Electrical circuit detecting phase difference
difference in phase between two signal inputs. The phase detector is an essential element of the phase-locked loop (PLL). Detecting phase difference is
Phase_detector
Effect on frequency of interacting oscillators
can degrade the performance of phase-locked loops and RF integrated circuits. Injection pulling and injection locking can be observed in numerous physical
Injection_locking
common distributed concurrency control technique is strong strict two-phase locking (SS2PL, also named rigorousness), which is also a common centralized
Distributed concurrency control
Distributed_concurrency_control
Power plugs and receptacles used in North America and some other regions
locking. The metal conductive blades are often informally called prongs (as in 3-prong plug). Numbers prefixed by 'L' are curved-blade, twist-locking
NEMA_connector
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
Charge-pump_phase-locked_loop
Relational database management system
by other architectures. Firebird index buckets aren't subject to two-phase locking, and boolean "and" and "or" operations can be performed on intermediate
Firebird_(database_server)
Overview of and topical guide to databases
appears natural to users and which goes beyond simple record keeping. Two-phase locking (2PL) – is a concurrency control method that guarantees serializability
Outline_of_databases
Database software
concurrency control (MVCC), deterministic concurrency control, and two-phase locking (deadlock detection). Ingres supports four isolation levels, from
Ingres_(database)
Java-based database engine
(released in 2014) is fully multi-threaded and supports high performance two-phase locking and MVCC (multiversion concurrency control) transaction control models
HSQLDB
Interleaved transaction conflict
transaction executes in its entirety before another begins. Strict two-phase locking (Strict 2PL) or Serializable Snapshot Isolation (SSI) prevent this
Read–write_conflict
Shape of the Moon's sunlit portion as viewed from Earth
phase or Moon phase is the apparent shape of the Moon's day and night phases of the lunar day as viewed from afar. Because the Moon is tidally locked
Lunar_phase
Exactly solvable model of coupled oscillators
K>K_{c}} , the angle falls into a stable attractor (that is, the two oscillators lock in phase). Similarly, the state space of the N=3 case is a 2-dimensional
Kuramoto_model
Situation in which an astronomical object's orbital period matches its rotational period
locking process are gravitational locking, captured rotation, and spin–orbit locking. The effect arises between two bodies when their gravitational interaction
Tidal_locking
supported in all general purpose database systems. Strong strict two-phase locking (SS2PL) is a popular serializability mechanism utilized in most of
Glossary_of_computer_science
Topics referred to by the same term
2PL may refer to: Two-phase locking, a concurrency control locking protocol in databases and transaction processing the glossing abbreviation for second
2PL
Electronic control system
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
Frequency-locked_loop
Light-stabilizing technique
for stabilizing the frequency of light emitted by a laser by means of locking to a stable cavity. The PDH technique has a broad range of applications
Pound–Drever–Hall_technique
Measurement method using interference of waves
single beam has been split along two paths, then the phase difference is diagnostic of anything that changes the phase along the paths. This could be a
Interferometry
Type of plug and socket design
blade. Locking type connectors are found mostly in industrial applications and are not common in residential and light commercial use. Twist-locking connectors
Industrial and multiphase power plugs and sockets
Industrial_and_multiphase_power_plugs_and_sockets
Theory of the mechanism of hearing
a second harmonic, phase-locking to the stimulus waveform. However, at frequencies between about 1000 Hz and 5000 Hz, phase-locking becomes progressively
Volley_theory
Synchronization mechanism for enforcing limits on access to a resource
process/thread will request a lock held by the other. (For example, locking a row rather than the entire table, or locking a cell rather than the entire
Lock_(computer_science)
Weight training exercise
(1,124.36 lb), achieved by Iceland's Hafþór Júlíus Björnsson. Deadlift phases Two styles of deadlift are commonly used in competition settings: the conventional
Deadlift
Video synchronization to a reference
devices). Generator locking can also be used to ensure that multiple CRT monitors that appear in a movie are flicker-free. Generator locking is also used to
Genlock
Improved phase-locked loop
A PLL multibit or multibit PLL is a phase-locked loop (PLL) which achieves improved performance compared to a unibit PLL by using more bits. Unibit PLLs
PLL_multibit
Circuit
flip-flop-based) frequency dividers, the drawback is their low locking range. The ILFD locking range is inversely proportional to the quality factor (Q) of
Frequency_divider
graph (serializability graph, precedence graph) checking Distributed Two-phase locking (Distributed 2PL) Distributed Timestamp ordering Tickets (local logical
Global_serializability
Time of day voice service
clock ensemble consisted of two announcing units (Zag 500), a supervisory unit (CCU 500), two phase-locked oscillators, two pulse distribution units, a
Speaking_clock
FPGA brand name
hard cores. Larger LP devices and all LM devices integrate one or two phase-locked loops. The families were launched in mid 2011 and entered volume production
ICE_(FPGA)
Sensor-controlled optical focus
in-focus subject. The only apparent differences between the two modes are that a focus-locking mode halts on focus confirmation, and a continuously focusing
Autofocus
Series of integrated graphics processors
configurations. The reason for this is that the chipsets only include two phase-locked loops (PLLs) for generating the pixel clocks timing the data being
Intel_Graphics_Technology
in Cardiology. 41: 781–784. ISSN 2325-8861. PMC 4319215. PMID 25664348. A tutorial on calculating Phase locking and Phase synchronization in Matlab.
Phase_synchronization
Monochrome light beam whose amplitude envelope is a Gaussian function
(due to the last two factors). It also contains part of the Gouy phase. The third factor is a pure phase that enhances the Gouy phase shift for higher
Gaussian_beam
American superhero media franchise
first MCU film, Iron Man (2008), began Phase One, which culminated in the 2012 crossover film The Avengers. Phase Two began with Iron Man 3 (2013) and concluded
Marvel_Cinematic_Universe
Nonlinear optical Pulse Compression of ultrashort pulses Passive mode-locking Ultrafast optical switching Demultiplexing of OTDM channels Wavelength
Cross-phase_modulation
Former RAF station in Somerset, England
RAF Locking was a Royal Air Force station near the village of Locking and about 3 miles (4.8 km) from Weston-super-Mare in North Somerset, England. During
RAF_Locking
Guitar vibrato system
The Floyd Rose Locking Tremolo, or simply Floyd Rose, is a type of locking vibrato arm for a guitar. Floyd D. Rose invented the locking vibrato in 1976
Floyd_Rose
International standard for industrial plugs
110–120 volts between phase and neutral or 220–240 volts between phase and phase. Since these two modes do not need three phases there is also a dark yellow-orange
IEC_60309
Phase-locked loop-based demodulator circuit
A Costas loop is a phase-locked loop (PLL) based circuit which is used for carrier frequency recovery from suppressed-carrier modulation signals (e.g.
Costas_loop
United States Army training course
divided into three phases. The 62 day course of instruction is divided into three phases: Darby Phase, Mountain Phase, and Swamp Phase. The Ranger School
Ranger_School
Synchronization primitive in computing
(programming) Mutual exclusion Scheduler pattern Balking pattern File locking Lock (computer science) Readers–writers problem This is the standard "wait"
Readers–writer_lock
Pseudo-digital circuit
In electronics, a delay-locked loop (DLL) is a pseudo-digital circuit similar to a phase-locked loop (PLL), with the main difference being the absence
Delay-locked_loop
Color encoding system for analogue television
alternating subcarrier phase to reduce phase errors, described as "PAL-D" for "delay", and "PAL-N" for "new" or "Chrominance Lock". This excluded very basic
PAL
Instrument to measure angular velocity
counter-propagating beams can allow for injection locking, so that the standing wave "gets stuck" in a preferred phase, thus locking the frequency of each beam to that
Ring_laser_gyroscope
Satellite navigation technique used to enhance the precision of position data
1% accuracy in locking. For instance, in the case of GPS, the coarse-acquisition (C/A) code, which is broadcast in the L1 signal, changes phase at 1.023 MHz
Real-time kinematic positioning
Real-time_kinematic_positioning
Potential for two waves to interfere
interference), depending on their relative phase. Constructive or destructive interference are limit cases, and two waves always interfere, even if the result
Coherence_(physics)
1995 studio album by Spiritualized
you run two things together in parallel you get this kind of Hawkwind effect (phase), which gets deeper as they drift away from being ‘locked’, so we
Pure_Phase
League of Legends esports series
followed by red side selecting two champions before blue side completes the first phase of picking and banning by also locking in two champions. The teams then
2022 League of Legends World Championship final
2022_League_of_Legends_World_Championship_final
Type of electric motor
'normally locking' motors, in the other it triggers). Then the 'motive' group releases, retracting the 'trailing locking' group. Finally, both 'locking' groups
Piezoelectric_motor
Military unit
conduct slingload training as part of phase 2 of Air Assault School at Camp Buehring The three days of Phase Two (Slingload Operations) includes training
United States Army Air Assault School
United_States_Army_Air_Assault_School
Recovery algorithm
as usual with Redo and Undo. The naive way for checkpointing involves locking the whole database to avoid changes to the DPT and the TT during the creation
Algorithms for Recovery and Isolation Exploiting Semantics
Algorithms_for_Recovery_and_Isolation_Exploiting_Semantics
American electrical engineer
(2003) Phase-Locking in High-Performance Systems, IEEE Press, (2003) Fundamentals of Microelectronics, Wiley, (2006) Design of CMOS Phase-Locked Loops
Behzad_Razavi
Navigational structures in Sault Ste. Marie, Michigan
(Davis Lock and Sabin Lock), which were obsolete and used infrequently. In May 2020, construction on Phase One of the replacement of the Sabin Lock was started
Soo_Locks
Smith, KR; Honari, H; Lindquist, MA; Caffo, BS; Pekar, JJ (2021). "Phase-locking of resting-state brain networks with the gastric basal electrical rhythm"
Phases_of_digestion
Submachine gun
contacts the locking shoulder, it stops, locking the breech. The bolt carrier continues rearward with the momentum it acquired in the initial phase. This delay
SIG_MKMO
Rupturing of the fibrocartilage strips in the knee called menisci
tears which can cause mechanical symptoms such as clicking, catching, or locking during motion of the joint. A tear of the medial meniscus can occur as
Meniscus_tear
Branch of physics
modelocking (KLM), the use of self-focusing as a mechanism to mode-lock laser. Self-phase modulation (SPM), an effect due to the optical Kerr effect (and
Nonlinear_optics
Panel van built by Renault
was the safety equipment upgraded, the comfort features, such as central locking with remote control, were updated as well. The 1598cc diesel engine was
Renault_Express
Program of United States Army
Army announced [t]he award of two firm-fixed price contracts for the Optionally Manned Fighting Vehicle [XM-30] Phase 3 and 4 Detailed Design and Prototype
XM30 Mechanized Infantry Combat Vehicle
XM30_Mechanized_Infantry_Combat_Vehicle
Cryptographic scheme
In the above metaphor, the commit phase is the sender putting the message in the box, and locking it. The reveal phase is the sender giving the key to the
Commitment_scheme
Technique in nonlinear optics
frequencies involved are not phase locked with each other. Energy will always flow from pump to signal as long as the phase between the two optical waves is less
Quasi-phase-matching
Season of anime television series
Blue Lock is an anime television series based on the manga series by Muneyuki Kaneshiro and illustrated by Yusuke Nomura. The second season is produced
Blue_Lock_season_2
Season of television series
post-apocalyptic world, security can be compromised at any time, so at night one or two colonists stay up to look after the others at certain times through the night
The Colony (American TV series) season 1
The_Colony_(American_TV_series)_season_1
Forms which matter can take
In physics, a state of matter or phase of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday
State_of_matter
Sound frequency changes responsible for perceptions of loudness, pitch and timbre
low-frequency sounds via their phase-locked discharges (i.e., TFSn information). The upper frequency limit for phase locking is species dependent. It is
Temporal envelope and fine structure
Temporal_envelope_and_fine_structure
Series of electrical connectors
connectors with screw-locking IEC 61076-2-111 M12 power connectors with screw-locking IEC 61076-2-109 M12 connectors with screw-locking for data transmission
IEC metric screw sized connectors
IEC_metric_screw_sized_connectors
Self-reinforcing single wave packet
with other solitons, and emerge from the collision unchanged, except for a phase shift. More formal definitions exist, but they require substantial mathematics
Soliton
Indian political election in Karnataka
candidates contesting in constituencies falling in the phase two of the polls was 4 April, and that for phase three was 19 April. A total of 247 candidates, which
2024 Indian general election in Karnataka
2024_Indian_general_election_in_Karnataka
Dam in Illinois and Iowa, U.S.
objects. It was completed in two phases, the first as part of the six foot channel project from 1921 to 1924, which included a lock and canal bypassing a hazardous
Lock_and_Dam_No._14
Behavior observed in neurons
disease or Parkinson's disease are shown to undergo phase resetting before launching into phase locking where clusters of neurons are able to begin firing
Phase_resetting_in_neurons
Small family car produced by Peugeot (1985–1994)
also added central locking and front electric windows to the list. Post facelift 1.3 models and the 1.4 model also have central locking. Curiously, if the
Peugeot_309
American woman on death row for murder in Texas
during sentencing phase of trial". KLTV. May 23, 2012. "Day 3 of sentencing phase in ETX murder trial". KLTV. May 24, 2012. "Sentencing phase underway in Cargill
Kimberly_Cargill
Type of magnetic order
present permanent magnetic phases produced by randomly located magnetic moments. Three common types of amorphous magnetic phases are asperomagnetism, speromagnetism
Amorphous_magnet
Laser source with equal intervals of spectral lines
C. Riek, A. Sell, R. Huber, A. Leitenstorfer (2011). "All-passive phase locking of a compact Er:fiber laser system", Opt. Lett., 36, 540. T. Fuji, A
Frequency_comb
Type of AC electric motor
on single-phase or three-phase power, but two-phase motors exist; in theory, induction motors can have any number of phases. Many single-phase motors having
Induction_motor
Type of wave
of phase-locked vector soliton in birefringent dispersive media, which is now known as a high-order phase-locked vector soliton in SMFs. It has two orthogonal
Vector_soliton
Device which extracts info from a modulated radio frequency current or voltage
used. A phase detector is a nonlinear device whose output represents the phase difference between the two oscillating input signals. It has two inputs
Detector_(radio)
Machine that converts electrical energy into mechanical energy
of motion output. They can be brushed or brushless, single-phase, two-phase, or three-phase, axial or radial flux, and may be air-cooled or liquid-cooled
Electric_motor
Algorithm in a thread whose failure cannot cause another thread to fail
trade-off between coarse-grained locking, which can significantly reduce opportunities for parallelism, and fine-grained locking, which requires more careful
Non-blocking_algorithm
Synchronization mechanism
reader–writer locking. The following side-by-side code display shows how closely related reader–writer locking and RCU can be. /* reader-writer locking */ /*
Read-copy-update
Fourth generation of BMW 3 Series
wheels via a race type 6-speed dual clutch sequential transmission with M locking differential. The engine featured dry sump lubrication as its racing counterpart
BMW_3_Series_(E46)
Type of simple planetary gear train
explanation needed] Locking differentials have the ability to overcome the chief limitation of a standard open differential by essentially "locking" both wheels
Differential (mechanical device)
Differential_(mechanical_device)
Neural phenomenon
is renewed interest in using the FFR to evaluate: the role of neural phase-locking in encoding of complex sounds in normally hearing and hearing impaired
Frequency_following_response
The carrier-envelope phase (CEP) or carrier-envelope offset (CEO) phase is an important feature of an ultrashort laser pulse and gains significance with
Carrier-envelope_phase
TWO PHASE-LOCKING
TWO PHASE-LOCKING
Male
Chinese
the way.
Girl/Female
Indian, Telugu
A Phase of Life; Childhood
Boy/Male
English American
Huntsman.
Male
English
Middle English surname (of Norman French origin) transferred to forename use, CHASE means "hunter."Â
Boy/Male
Welsh
gift from God'.
Surname or Lastname
English
English : perhaps, as Reaney proposes, a variant of Tough.
Boy/Male
Spanish
God. Abbreviation of names like Mateo and Teodor.
Girl/Female
Tamil
Phase, Time of day
Surname or Lastname
English
English : from Middle English pese ‘pea’, hence a metonymic occupational name for a grower or seller of peas, or a nickname for a small and insignificant person. The word was originally a collective singular (Old English peose, pise, from Latin pisa) from which the modern English vocabulary word pea is derived by folk etymology, the singular having been taken as a plural.Robert and John Pease came from Great Baddow, Essex, England, to Salem, MA, in 1634. In 1644 Robert died, leaving a son (also called Robert) who was apprenticed as a weaver in Salem. By 1646 John Pease was living on Martha’s Vineyard.
Boy/Male
German
Chase; Hunt
Surname or Lastname
German
German : nickname for a swift runner or a timorous person, from Middle High German, Middle Low German hase ‘hare’.Jewish (Ashkenazic) : ornamental name from German Hase ‘hare’.English : from a Middle English nickname, Hase, from Old English hÄs ‘harsh, raucous, or hoarse voice’.Japanese : usually written with characters meaning ‘long valley’; habitational name from a place in Yamato (now Nara prefecture). Listed in the Shinsen shÅjiroku. Some bearers are descended from the Taira clan; they are found mainly in eastern Japan. Also pronounced Nagaya and Nagatani; the original pronunciation was Hatsuse, meaning ‘beginning of the strait’.
Male
Polish
Polish form of Latin Ivo, IWO means "yew tree."
Surname or Lastname
English
English : metonymic occupational name for a huntsman, or rather a nickname for an exceptionally skilled huntsman, from Middle English chase ‘hunt’ (Old French chasse, from chasser ‘to hunt’, Latin captare).Southern French : topographic name for someone who lived in or by a house, probably the occupier of the most distinguished house in the village, from a southern derivative of Latin casa ‘hut’, ‘cottage’, ‘cabin’.Thomas Chase came to MA from Chesham, Buckinghamshire, England, in the 1640s, and had many prominent descendants. Samuel Chase, born in Somerset Co., MD, in 1741, was one of the first members of the U.S. Supreme Court; Philander Chase, born in Cornish, NH, in 1741 was a prominent Episcopal clergyman, and his nephew Salmon Portland Chase (1808–73), also born in Cornish, was governor of OH, a U.S. senator, and secretary of the U.S. Treasury during the Civil War.
Male
French
French form of Latin Stephanus, STÉPHANE means "crown."
Girl/Female
Australian, Chinese
Peach
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu
Phase; Time of Day
Male
Welsh
Welsh form of English Tom, TWM means "twin."
Boy/Male
German, Polish
Yew Tree
Girl/Female
African, Australian
Awesome
Boy/Male
American, Australian, British, Chinese, Christian, English, French
Huntsman; Hunter
TWO PHASE-LOCKING
TWO PHASE-LOCKING
Girl/Female
Hindu, Indian
Flower
Boy/Male
Anglo, British, English, Latin
Name of a King; Old
Girl/Female
Hindu, Indian
River
Girl/Female
Indian, Tamil
Cool; Goddess Santoshi Maata
Boy/Male
Tamil
Lord Krishna, Who does not have any end, Without beginning
Boy/Male
American, British, English
Royal Ruler; Son of Harry
Boy/Male
Tamil
Rohinish | ரோஹிநிஷ
The Moon
Girl/Female
Indian, Modern
A Beautiful Flower
Surname or Lastname
English
English : unexplained. If it survives at all in England, the name is now very rare there.Muslim : unexplained.
Boy/Male
Tamil
Sun
TWO PHASE-LOCKING
TWO PHASE-LOCKING
TWO PHASE-LOCKING
TWO PHASE-LOCKING
TWO PHASE-LOCKING
v. t.
To chase.
v. t.
To chase again; to chase or drive back.
v. i.
To give chase; to hunt; as, to chase around after a doctor.
n.
The sum of one and one; the number next greater than one, and next less than three; two units or objects.
v. t.
The act of towing, or the state of being towed; --chiefly used in the phrase, to take in tow, that is to tow.
n.
A symbol representing two units, as 2, II., or ii.
pl.
of Phase
n.
A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form of enlightened disk; as, the phases of the moon or planets. See Illust. under Moon.
n.
That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object.
n.
Any appearance or aspect of an object of mental apprehension or view; as, the problem has many phases.
n.
One and one; twice one.
v. t.
To cut, so as to make a screw thread.
v. t.
To follow as if to catch; to pursue; to compel to move on; to drive by following; to cause to fly; -- often with away or off; as, to chase the hens away.
n.
Any one point or portion in a recurring series of changes, as in the changes of motion of one of the particles constituting a wave or vibration; one portion of a series of such changes, in distinction from a contrasted portion, as the portion on one side of a position of equilibrium, in contrast with that on the opposite side.
n.
The liberty or franchise of having a chase; free chase.
v. t.
To express in words, or in peculiar words; to call; to style.
v. i.
To group notes into phrases; as, he phrases well. See Phrase, n., 4.
n.
See Phase.
n.
A brief expression, sometimes a single word, but usually two or more words forming an expression by themselves, or being a portion of a sentence; as, an adverbial phrase.
a.
Without a phase, or visible form.