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Algorithm for partial ordering of events and detecting causality in distributed systems
A vector clock is a data structure used for determining the partial ordering of events in a distributed system and detecting causality violations. Just
Vector_clock
Algorithm used to determine the order of events in a distributed computer system
overhead, and conceptually provide a starting point for the more advanced vector clock method. The algorithm is named after its creator, Leslie Lamport. Distributed
Lamport_timestamp
Mechanism for tracking data changes
may therefore influence, later updates. Version vectors maintain state identical to that in a vector clock, but the update rules differ slightly; in this
Version_vector
Mechanism for capturing chronological and causal relationships
noteworthy logical clock algorithms are: Lamport timestamps, which are monotonically increasing software counters. Vector clocks, that allow for partial
Logical_clock
clocks are a generalization of the notion of vector clocks. A matrix clock maintains a vector of the vector clocks for each communicating host. Every time
Matrix_clock
Topics referred to by the same term
Template Library Vector clock, an algorithm Vector space model, an algebraic model for representing text documents Euclidean vector, a geometric object
Vector
Consistency model used in distributed computing to achieve high availability
read-repair) and the current version of Cassandra does not provide a Vector Clock conflict resolution mechanisms [sic] (should be available in the version
Eventual_consistency
Instructions for the x86 microprocessors
has a book on the topic of: X86 Assembly/AVX, AVX2, FMA3, FMA4 Advanced Vector Extensions (AVX, also known as Gesher New Instructions and then Sandy Bridge
Advanced_Vector_Extensions
Relation between two events in computer science
happened-before relation unless they use a logical clock, like a Lamport clock or a vector clock. This allows one to design algorithms for mutual exclusion
Happened-before
Concurrency control method commonly used by database management systems
databases using MVCC Read-copy-update Timestamp-based concurrency control Vector clock Version control "Clojure - Refs and Transactions". clojure.org. Retrieved
Multiversion concurrency control
Multiversion_concurrency_control
Coordination of independent clocks
passing. Lamport timestamps and vector clocks are concepts of the logical clock in distributed computing. Implementing clock synchronization through wireless
Clock_synchronization
German computer scientist
University of St. Gallen. Together with Colin Fidge, he developed the vector clock algorithm, which allows one to generate a partial ordering of events
Friedemann_Mattern
Model in software programming
predecessors requires a distributed graph traversal. The other is to maintain a vector clock, with one entry per process (or group of processes), counting the number
Causal_consistency
Type of display device
A vector monitor, vector display, or calligraphic display is a display device used for computer graphics up through the 1970s. It is a type of CRT, similar
Vector_monitor
Cloud-based service
number of collaborating nodes. Highly available writes Vector Clock or Dotted-Version-Vector Sets, reconciliation during reads Version size is decoupled
Dynamo_(storage_system)
Concurrency control method for collaborative software
paper to achieve convergence in a group text editor; the state-vector (or vector clock in classic distributed computing) was used to preserve the precedence
Operational_transformation
Overview of and topical guide to algorithms
Paxos (computer science) Raft (algorithm) Byzantine fault tolerance Vector clock Lamport timestamp Leader election Gossip protocol Mutual exclusion Semaphore
Outline_of_algorithms
Theory of interwoven space and time by Albert Einstein
a clock. Moving clocks run slower. Two events measured at the same time on a stationary clock occur at different times if measured on moving clocks. At
Special_relativity
of it. Such techniques can typically be implemented efficiently with vector clock algorithms, allowing only one pass of the whole input trace as it is
Runtime_predictive_analysis
Portable computer released by IBM in 1975
directly read and write RAM memory, video memory, CPU registers, interrupt vectors, clock counter, etc., using hexadecimal codes equivalent to assembly language
IBM_5100
Extraction of information from a running system to verify certain properties
models of the executing system. For example, augmenting events with Vector clock information and with data and control flow information allows the monitors
Runtime_verification
Central processing unit by Sony Computer Entertainment and Toshiba
PlayStation 2 hardware. Clock frequency: 294.912 MHz, 299 MHz (later versions) Instruction set: MIPS III, MIPS IV subset, 107 vector instructions 2-issue
Emotion_Engine
consistent global state for an asynchronous system Chandy–Lamport algorithm Vector clocks: generate a partial ordering of events in a distributed system and detect
List_of_algorithms
1956 nuclear physics experiment on weak force parity conservation
an axial vector. Conversely, the direction in which the decay products are emitted is changed under parity and their linear momentum vector is called
Wu_experiment
Free and open-source database management system
timestamps (node bootstrap time) Version numbers (logical clock values) The system uses vector clocks to track information currency and ignore outdated state
Apache_Cassandra
1987 Russian home computer
unique Soviet KR580VM1 CPU. A commercial project called Vector Turbo+ with a Z80 CPU, clock frequency increased to 6 or 12 MHz, RAM sized up to 2 MiB
Vector-06C
Mathematical model combining space and time
momentum vector is extended to four dimensions. Added to the momentum vector is a time component that allows the spacetime momentum vector to transform
Spacetime
Serial Vector Format (SVF) is a file format that contains boundary scan vectors to be sent to an electronic circuit using a JTAG interface. Boundary scan
Serial_Vector_Format
Clock displaying astronomical information
An astronomical clock, horologium, or orloj is a clock with special mechanisms and dials to display astronomical information, such as the relative positions
Astronomical_clock
Hardware description language
: in std_logic_vector(2 downto 0); a2 : in std_logic_vector(2 downto 0); a3 : in std_logic_vector(2 downto 0); a4 : in std_logic_vector(2 downto 0); sel
VHDL
Horizontal angle from north or other reference cardinal direction
surface, and the reference vector points to true north. The azimuth is the angle between the north vector and the star's vector on the horizontal plane.
Azimuth
Mechanism for regulating the speed of clocks
Shortt-Synchronome clock achieved accuracy of about one second per year before it was superseded as a time standard by the quartz clock in the 1930s. Pendulums
Pendulum
NoSQL object of the lowest level in a keyspace
up-to-date. Some data stores, like Riak, may use the more sophisticated vector clock instead of the timestamp to resolve stale information. In relational
Column_(data_store)
Bit-vector representation where only one bit can be set at a time
one-hot vector is a 1 × N matrix (vector) used to distinguish each word in a vocabulary from every other word in the vocabulary. The vector consists
One-hot
a very simple algorithm for causal message delivery, and an optimal vector-clock-based distributed checkpointing algorithms, which established the theoretical
Michel_Raynal
Computer processor
of one double precision slot in the vector registers, the vector unit delivers twice as many operations per clock cycle compared to double precision.
NEC_SX-Aurora_TSUBASA
Parasitic disease also known as sleeping sickness
bites, for example by the use of insect repellents and protective clothing. Vector control measures, such as spraying insecticides and releasing sterilized
African_trypanosomiasis
Metric to measure computing performance in 64-bit processors and above
Choose the weighting factor for each processor: 0.9 for vector processors and 0.3 for non-vector processors. This is W(i). Calculate the APP for the system
Adjusted_Peak_Performance
projection clock (also called ceiling clock) is an analogue or digital clock equipped with a projector that creates an enlarged image of the clock face or
Projection_clock
CPU that implements instruction-level parallelism within a single processor
single instruction per clock cycle, a superscalar processor can execute or start executing more than one instruction during a clock cycle by simultaneously
Superscalar_processor
Intel GPU architecture
an Xe-LP subslice. An Xe-core contains vector and matrix arithmetic logic units, which are referred to as vector and matrix engines. Other components include
Intel_Xe
Analogue of velocity in four-dimensional spacetime
is a four-vector in four-dimensional spacetime that represents the relativistic counterpart of velocity, which is a three-dimensional vector in space.
Four-velocity
1995 supercomputer series
featured a 2.2 ns (450 MHz) clock cycle and two-wide vector pipes, for a peak speed of 1.8 gigaflops per processor; the high clock speed arises from the CPUs
Cray_T90
Movement in the same direction as a clock's hands
defined senses when considering the corresponding angular velocity vector. Before clocks were commonplace, the terms "sunwise" and the Scottish Gaelic-derived
Clockwise
Central computer component that executes instructions
of these early synchronous CPUs ran at low clock rates compared to modern microelectronic designs. Clock signal frequencies ranging from 100 kHz to 4 MHz
Central_processing_unit
Type of atomic clock
1038/s41586-024-07225-2. PMC 11043038. PMID 38658684. "Vector Atomic brings world's first rackmount optical clock to market". www.businesswire.com. 13 November
Optical_clock
Family of linear transformations
Euclidean vectors, row or column vectors, etc., see Linear algebra and Vector space for details. The generators of a Lie group also form a vector space over
Lorentz_transformation
Miniprocessor chip set
development) DC521 clock chip In addition, two further devices implemented the VAX vector processor option; these comprised the DC555 Vector Register set chip
Rigel_(microprocessor)
Type of vaccine
A viral vector vaccine is a vaccine that uses a viral vector to deliver genetic material (DNA) that can be transcribed by the recipient's host cells as
Viral_vector_vaccine
Supercomputer manufactured by Cray Research
real-time clock register and four 64-bit instruction buffers that held sixty-four 16-bit instructions each. The hardware was set up to allow the vector registers
Cray-1
Families of matrices in mathematics, physics, and quantum information
finite-dimensional vector spaces as formulated by Hermann Weyl, and they find routine applications in numerous areas of mathematical physics. The clock matrix amounts
Generalizations of Pauli matrices
Generalizations_of_Pauli_matrices
Weight suspended from a rope which swings in a circular or elliptical path
Oscillatorium. Later it was used as the timekeeping element in a few mechanical clocks and other clockwork timing devices. During the 1800s, conical pendulums
Conical_pendulum
American computer manufacturer
Computer Corporation was a company that developed, manufactured and marketed vector minisupercomputers and supercomputers for small-to-medium-sized businesses
Convex_Computer
Symmetry of spatially mirrored systems
rotationally invariant. vectors ( P = −1 ) and axial vectors (also called pseudovectors) ( P = +1 ) which both transform as vectors under rotation. One can
Parity_(physics)
Design for testing technique for integrated circuits
checking, and ATPG vector generation. Scan design audits ensure compliance with DFT rules — such as using only D-type flip-flops, clock controllability,
Scan_chain
formalized these clock-and-shift operators introduced by J. J. Sylvester (1882), and organized by Cartan (1898) and Schwinger. Clock and shift matrices
Generalized_Clifford_algebra
Function whose implementation is handled specially by the compiler
compiling. The compiler parses the intrinsic functions and converts them into vector math or multiprocessing object code appropriate for the target platform
Intrinsic_function
Programming paradigm in which many processes are executed simultaneously
linear arrays of numbers or vectors. An example vector operation is A = B × C, where A, B, and C are each 64-element vectors of 64-bit floating-point numbers
Parallel_computing
Supercomputer
between 1966 and 1973. The ASC's central processing unit (CPU) supported vector processing, a performance-enhancing technique which was key to its high-performance
TI Advanced Scientific Computer
TI_Advanced_Scientific_Computer
2024 Intel product line
There has been a clock speed regression for Lion Cove P-cores in Arrow Lake-S desktop processors. The Core Ultra 9 285K has a peak clock speed of 5.7 GHz
Arrow_Lake_(microprocessor)
Supercomputer by Cray Research
architecture. Compared to the Y-MP, the C90 processor had a dual vector pipeline and a faster 4.1 ns clock cycle (244 MHz), which together gave three times the performance
Cray_C90
pipeline, in terms of functional units. Core clock – The reference base and boost (if available) core clock frequency. Fillrate Pixel - The rate at which
List of AMD graphics processing units
List_of_AMD_graphics_processing_units
Classification of computer architectures
lockstep fashion and do so via mechanisms such as global clocks, central control units or vector unit controllers. Further subdivision of this category
Duncan's_taxonomy
GPU microarchitecture by AMD released in 2020
32 KB of shared L0 cache per WGP. Each CU contains two sets of an SIMD32 vector unit, an SISD scalar unit, textures units, and a stack of various caches
RDNA_2
2022 AMD 5-nanometer processor microarchitecture
256-bit vector instructions. There are four 256-bit execution units, which gives a maximum throughput of two 512-bit vector instructions per clock cycle
Zen_4
Apple-branded microprocessor
see the need back then for the Vector Processing Unit. Ultimately, the G4 architecture design contained a 128-bit vector processing unit labelled AltiVec
PowerPC_G4
architecture, 300 MHz clock rate, developed by MCST Elbrus-S Elbrus-1S+ – single-core evolution of Elbrus 2000 SoC, 1000 MHz clock rate + GPU Elbrus-2S+
List of Russian microprocessors
List_of_Russian_microprocessors
Describes a periodicity in the homotopy groups of classical groups
for much further research, in particular in K-theory of stable complex vector bundles, as well as the stable homotopy groups of spheres. Bott periodicity
Bott_periodicity_theorem
Topics referred to by the same term
order of operations Curly-bracket languages, in programming Lie bracket of vector fields, multiple meanings Poisson bracket, an operator used in mathematics
Bracket_(disambiguation)
architecture. The vector processor is made up of eight vector pipeline units each with seventy-two 256-word vector registers. The vector unit performs add/shift
NEC_SX-6
GPU microarchitecture by AMD
compute units. This compensates for lower core clock speeds used in low-power situations. Most rich vector shader instructions for interpolation and comparison
RDNA_3
2024 AMD 4-nanometer processor microarchitecture
operations can increase per-cycle scalar integer throughput by 50%. The vector engine in Zen 5 features four floating-point pipes compared to three pipes
Zen_5
Family of flies
without immediately killing them. Medical parasitologists view mosquitoes as vectors of disease, carrying protozoan parasites or bacterial or viral pathogens
Mosquito
Mechanical calculating device
target ship. It was often used with other devices, such as a Vickers range clock, to generate range and deflection data so the gun sights of the ship could
Dumaresq
Class of computer processors
designs from the new vector processors. A superscalar processor (such as the Intel P5) may execute more than one instruction during a clock cycle by simultaneously
Scalar_processor
Graphics processing unit brand
(TMUs) multiplied by the base (or boost) core clock speed. Xe2-HPG Cores (Xe Vector Engines) Unified Shaders : Texture Mapping Units : Render Output Units :
Intel_Arc
8-bit microprocessor
i = 0, for vectored method, the interrupting device has the opportunity to place the op-code for one byte. If i = 2, for indirect vector method, the
Zilog_Z80
Open-source CPU instruction set architecture
ARM's Scalable Vector Extension. That is, each vector in up to 32 vectors is the same length. The application specifies the total vector width it requires
RISC-V
Species of insect
PMID 15347391. S2CID 15788942. Ostrolenk M, Welch H (May 1942). "The House Fly as a Vector of Food Poisoning Organisms in Food Producing Establishments". American
Housefly
SMPTE timecode as MIDI messages
Technology. 1 (9): 64–66 – via Music Magazine Archive. "Chris Meyer-New Vectors In Sound". MIDI.org. 2025-01-03. Retrieved 2025-12-28. Lehrman, Paul D
MIDI_timecode
2015 64-bit mainframe microprocessor by IBM
and peripherals. The z13 processor supports a new vector facility architecture. It adds 32 vector registers, each 128 bits wide; the existing 16 floating-point
IBM_z13
CMOS microprocessor in the 6502 family
addressing modes, including zero page addressing. Vector pull (VPB) output indicates when interrupt vectors are being addressed. Memory lock (MLB) output
WDC_65C02
Device storing number of times an event or process occurred
that counts and stores the number of positive or negative transitions of a clock signal. A counter typically consists of flip-flops, which store a value
Counter_(digital)
Process of energy transfer to an object via force application through displacement
direction. Both force and displacement are vectors. The work done is given by the dot product of the two vectors, where the result is a scalar. When the
Work_(physics)
Supercomputer built by NEC Corporation
run at 2.2 GHz for vectors and 1.1 GHz for scalar operations. The SX-8R can process double the number of vector operations per clock compared to the SX-8
NEC_SX-8
Natural phenomenon when daylight lasts for a whole day
W., Patadia, F., Aluru, N., Macpherson, B., and Mikovitz, J.C., 2025. A Vector-Based Universal Formula for the Solar Geometry of Single-Axis Trackers:
Midnight_sun
File format for 3D printing and scanning
of triangles - 04 bytes foreach triangle - 50 bytes REAL32[3] – Normal vector - 12 bytes REAL32[3] – Vertex 1 - 12 bytes REAL32[3] – Vertex 2 - 12 bytes
STL_(file_format)
Brand of data center GPUs by AMD
units and Compute units (CU) The matrix unit exists in addition to the main vector (SIMD) processing unit to accelerate matrix-multiplication operations common
AMD_Instinct
GPU microarchitecture by Nvidia
them at a high clock speed (made possible by their simplicity). GeForce 8 runs the various parts of its core at differing clock speeds (clock domains), similar
Tesla_(microarchitecture)
Distance amplifying instrument
called a dial indicator, provides a dial display similar to a clock face with clock hands; the hands point to graduations in circular scales on the
Indicator (distance amplifying instrument)
Indicator_(distance_amplifying_instrument)
Type of small omnivorous rodent
behavior to resemble that of prairie voles in experiments in which a viral vector was used to increase a single gene's expression within a particular brain
Vole
Synthesizer
The Korg Wavestation is a vector synthesis synthesizer first produced in the early 1990s and later re-released as a software synthesizer in 2004. Its primary
Korg_Wavestation
Topics referred to by the same term
Homogeneous dilation (homothety), the scalar multiplication operator on a vector space or affine space Inhomogeneous dilation, where scale factors may differ
Dilation
Proposed theories of gravity
true of vector–tensor theories, the deviation of the vector–tensor theories from general relativity is being squashed to zero. Further, vector–tensor theories
Alternatives to general relativity
Alternatives_to_general_relativity
Submachine gun
military or police force. Barnitzke machine gun Hotchkiss Type Universal KRISS Vector List of submachine guns McCollum, Ian (May 23, 2017). "MGD PM9 Rotary-Action
MGD_PM-9
Type of simple planetary gear train
axle to rotate at different speeds while cornering. Other uses include clocks and analogue computers. Differentials can also provide a gear ratio between
Differential (mechanical device)
Differential_(mechanical_device)
Human protein and coding gene
rhythms. Research has revealed that BMAL1 is the only clock gene without which the circadian clock fails to function in humans. BMAL1 has also been identified
Basic helix-loop-helix ARNT-like protein 1
Basic_helix-loop-helix_ARNT-like_protein_1
Simulation of the appearance of being three-dimensional
1978. In normal mapping, the unit vector from the shading point to the light source is dotted with the unit vector normal to that surface, and the dot
2.5D
IBM's 64-bit instruction set architecture implemented by its mainframe computers
facility named "Vector Facility", which was first documented in edition 11 of z/Architecture Principles of Operation. It adds 32 vector registers, each
Z/Architecture
Measure of computer performance
claiming it to be the world's fastest vector supercomputer. The SX-9 features the first CPU capable of a peak vector performance of 102.4 gigaFLOPS per single
Floating point operations per second
Floating_point_operations_per_second
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