Hesela / Structured knowledge

Storage Knowledge Corpus

Storage definitions, connected to their evidence.

866 terms · Page 11 of 29

A-Z

  1. Term

    Idempotency

    Idempotency is the property that repeating the same operation with identical inputs has the same intended effect as performing it once.

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  2. Term

    Idempotency key

    An idempotency key identifies attempts of one logical request so a service can recognize retries within its documented scope and retention rules.

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  3. Term

    Identity discrepancy

    An identity discrepancy is a disagreement between a stored block's identity and the identity expected by its reader.

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  4. Term

    Idle Read After Write (IRAW)

    Idle Read After Write is a research technique that retains completed-write data for comparison with disk contents during idle periods.

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  5. Term

    INCITS T10 SCSI

    The standards body maintaining SCSI command sets used by SAS, FC, and iSCSI block devices.

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  6. Term

    Incremental backup

    An incremental backup records changes relative to an earlier backup state and reuses retained backup data to represent unchanged content.

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  7. Term

    Independent access range (Linux)

    A Linux independent access range is an advertised region of a block device that can service requests in parallel with its other reported regions.

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  8. Term

    Informative censoring

    Informative censoring occurs when the observation-ending process conveys information about the event time beyond what the survival analysis accounts for.

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  9. Term

    Inode

    An inode is a filesystem object that holds a file's metadata and has a filesystem-local number, distinct from the directory names and open file descriptions that refer to the file.

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  10. Term

    Inspection paradox

    The inspection paradox is the length bias by which sampling a time point overrepresents long intervals compared with sampling intervals equally.

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  11. Term

    Intel Optane

    Intel's brand for storage products built on 3D XPoint non-volatile memory before the business was wound down.

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  12. Term

    Interarrival time

    An interarrival time is the elapsed interval between consecutive events in a specified event stream.

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  13. Term

    Interval-censoring

    Interval-censoring is incomplete event-time observation in which an event is known to have occurred within an interval but its exact time is unknown.

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  14. Term

    Invertible Bloom lookup table

    An invertible Bloom lookup table is a randomized data structure that supports updates and can list encoded entries with high probability under its sizing assumptions.

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  15. Term

    io_uring

    io_uring is a Linux asynchronous I/O interface that exchanges requests and completion results through shared submission and completion rings.

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  16. Term

    io_uring cancellation

    io_uring cancellation is a request to stop matching outstanding operations, with a result separate from each target operation's completion.

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  17. Term

    io_uring completion queue entry

    An io_uring completion queue entry is a result record containing an operation result, flags and application-provided identification data.

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  18. Term

    io_uring drain

    io_uring drain is a submission flag that delays a request until earlier requests in the same ring finish and delays later requests until the drain request finishes.

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  19. Term

    io_uring integrity metadata

    io_uring integrity metadata is a separately described protection-information buffer attached to a read or write request through SQE attributes.

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  20. Term

    io_uring linked requests

    io_uring linked requests are a chain of submission entries whose dependencies delay each successor until its predecessor completes.

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  21. Term

    io_uring linked timeout

    An io_uring linked timeout is a timer request attached to an operation that can trigger cancellation when its deadline expires.

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  22. Term

    IOPS

    Observed IOPS is the number of completed input/output operations divided by the measurement duration at a specified system boundary.

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  23. Term

    iSCSI

    iSCSI is a storage transport protocol that carries SCSI commands, data and responses between initiators and targets over TCP/IP networks.

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  24. Term

    iSCSI Command Sequence Number

    An iSCSI Command Sequence Number (CmdSN) identifies a command's position in the session-wide delivery sequence.

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  25. Term

    iSCSI Connection

    An iSCSI connection is a TCP connection carrying iSCSI protocol messages between an initiator and a target within an iSCSI session.

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  26. Term

    iSCSI Error Recovery Level

    The iSCSI Error Recovery Level is the session-wide negotiated value from 0 to 2 that selects the protocol recovery capabilities available to an initiator and target.

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  27. Term

    iSCSI Network Portal

    An iSCSI network portal is a TCP/IP access point used by an iSCSI node, identified by an IP address at an initiator and by an IP address plus listening TCP port at a target.

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  28. Term

    iSCSI Node Name

    An iSCSI node name is the persistent, location-independent identifier of an iSCSI initiator or target, distinct from the IP addresses through which that node is reached.

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  29. Term

    iSCSI Portal Group

    An iSCSI portal group is a node-scoped set of network portals capable of coordinating the connections of a common iSCSI session.

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  30. Term

    iSCSI Session

    An iSCSI session is a protocol association between an initiator and a target that groups TCP connections and, for a normal session, represents a SCSI I_T nexus.

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