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  2. AWS Lambda - Wikipedia

    en.wikipedia.org/wiki/AWS_Lambda

    AWS Lambda layer is a ZIP archive containing libraries, frameworks or custom code that can be added to AWS Lambda functions. [9] As of December 2024, AWS Lambda layers have significant limitations: [10] [11] No semantic versioning support. Incompatibility with major security scanning tools. Contribution to Lambda's 250MB size limit. Impeded ...

  3. Lambda architecture - Wikipedia

    en.wikipedia.org/wiki/Lambda_architecture

    Lambda architecture depends on a data model with an append-only, immutable data source that serves as a system of record. [ 2 ] : 32 It is intended for ingesting and processing timestamped events that are appended to existing events rather than overwriting them.

  4. Commitment ordering - Wikipedia

    en.wikipedia.org/wiki/Commitment_ordering

    This definition is probably the broadest such definition possible in the context of database concurrency control, and it makes CO together with any of its (useful: No concurrency control information distribution) generalizing variants (Vote ordering (VO); see CO variants below) the necessary condition for Global serializability (i.e., the union ...

  5. Process calculus - Wikipedia

    en.wikipedia.org/wiki/Process_calculus

    In computer science, the process calculi (or process algebras) are a diverse family of related approaches for formally modelling concurrent systems.Process calculi provide a tool for the high-level description of interactions, communications, and synchronizations between a collection of independent agents or processes.

  6. Concurrency control - Wikipedia

    en.wikipedia.org/wiki/Concurrency_control

    Thus concurrency control is an essential element for correctness in any system where two database transactions or more, executed with time overlap, can access the same data, e.g., virtually in any general-purpose database system. Consequently, a vast body of related research has been accumulated since database systems emerged in the early 1970s.

  7. CAP theorem - Wikipedia

    en.wikipedia.org/wiki/CAP_theorem

    This is the definition of availability in CAP theorem as defined by Gilbert and Lynch. [1] Note that availability as defined in CAP theorem is different from high availability in software architecture. [5] Partition tolerance The system continues to operate despite an arbitrary number of messages being dropped (or delayed) by the network ...

  8. Little's law - Wikipedia

    en.wikipedia.org/wiki/Little's_law

    In mathematical queueing theory, Little's law (also result, theorem, lemma, or formula [1] [2]) is a theorem by John Little which states that the long-term average number L of customers in a stationary system is equal to the long-term average effective arrival rate λ multiplied by the average time W that a customer spends in the system.

  9. Concurrency (computer science) - Wikipedia

    en.wikipedia.org/wiki/Concurrency_(computer_science)

    The Concurrency Representation Theorem in the actor model provides a fairly general way to represent concurrent systems that are closed in the sense that they do not receive communications from outside. (Other concurrency systems, e.g., process calculi can be modeled in the actor model using a two-phase commit protocol. [13])