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  2. Data deduplication - Wikipedia

    en.wikipedia.org/wiki/Data_deduplication

    Target deduplication is the process of removing duplicates when the data was not generated at that location. Example of this would be a server connected to a SAN/NAS, The SAN/NAS would be a target for the server (target deduplication). The server is not aware of any deduplication, the server is also the point of data generation.

  3. Duplicate code - Wikipedia

    en.wikipedia.org/wiki/Duplicate_code

    In computer programming, duplicate code is a sequence of source code that occurs more than once, either within a program or across different programs owned or maintained by the same entity. Duplicate code is generally considered undesirable for a number of reasons. [ 1 ]

  4. Skip list - Wikipedia

    en.wikipedia.org/wiki/Skip_list

    A schematic picture of the skip list data structure. Each box with an arrow represents a pointer and a row is a linked list giving a sparse subsequence; the numbered boxes (in yellow) at the bottom represent the ordered data sequence.

  5. Priority queue - Wikipedia

    en.wikipedia.org/wiki/Priority_queue

    The nodes of the skip list consists of a unique key, a priority, an array of pointers, for each level, to the next nodes and a delete mark. The delete mark marks if the node is about to be deleted by a process. This ensures that other processes can react to the deletion appropriately. insert(e): First, a new node with a key and a priority is ...

  6. Persistent data structure - Wikipedia

    en.wikipedia.org/wiki/Persistent_data_structure

    In computing, a persistent data structure or not ephemeral data structure is a data structure that always preserves the previous version of itself when it is modified. Such data structures are effectively immutable, as their operations do not (visibly) update the structure in-place, but instead always yield a new updated structure.

  7. Reference counting - Wikipedia

    en.wikipedia.org/wiki/Reference_counting

    Because of this, removing a single reference can potentially lead to a large number of objects being freed. A common modification allows reference counting to be made incremental: instead of destroying an object as soon as its reference count becomes zero, it is added to a list of unreferenced objects, and periodically (or as needed) one or ...

  8. Cache replacement policies - Wikipedia

    en.wikipedia.org/wiki/Cache_replacement_policies

    The average memory reference time is [1] = + + where = miss ratio = 1 - (hit ratio) = time to make main-memory access when there is a miss (or, with a multi-level cache, average memory reference time for the next-lower cache)

  9. Replication (computing) - Wikipedia

    en.wikipedia.org/wiki/Replication_(computing)

    It is implemented either in hardware (in a disk array controller) or in software (in a device driver). The most basic method is disk mirroring , which is typical for locally connected disks. The storage industry narrows the definitions, so mirroring is a local (short-distance) operation.