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  2. Fragmentation (computing) - Wikipedia

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

    Fragmentation of 0% means that all the free memory is in a single large block; fragmentation is 90% (for example) when 100 MB free memory is present but largest free block of memory for storage is just 10 MB.

  3. Defragmentation - Wikipedia

    en.wikipedia.org/wiki/Defragmentation

    In Windows NT 4.0, defragmenting APIs were introduced that third-party tools could use to perform defragmentation tasks; however, no defragmentation software was included. In Windows 2000 , Windows XP and Windows Server 2003 , Microsoft included a defragmentation tool based on Diskeeper [ 9 ] that made use of the defragmentation APIs and was a ...

  4. Market fragmentation - Wikipedia

    en.wikipedia.org/wiki/Market_fragmentation

    Fragmentation in a technology market happens when a market is composed of multiple highly-incompatible technologies or technology stacks, forcing prospective buyers of a single product to commit to an entire product ecosystem, rather than maintaining free choice of complementary products and services.

  5. Zero page - Wikipedia

    en.wikipedia.org/wiki/Zero_page

    The zero page or base page is the block of memory at the very beginning of a computer's address space; that is, the page whose starting address is zero. The size of a page depends on the context, and the significance of zero page memory versus higher addressed memory is highly dependent on machine architecture.

  6. DNA fragmentation - Wikipedia

    en.wikipedia.org/wiki/DNA_fragmentation

    Apoptotic DNA fragmentation is a natural fragmentation that cells perform in apoptosis (programmed cell death). DNA fragmentation is a biochemical hallmark of apoptosis.In dying cells, DNA is cleaved by an endonuclease that fragments the chromatin into nucleosomal units, which are multiples of about 180-bp oligomers and appear as a DNA ladder when run on an agarose gel. [8]

  7. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    More simply, going from 99.9% availability to 99.95% availability is a factor of 2 (0.1% to 0.05% unavailability), but going from 99.95% to 99.99% availability is a factor of 5 (0.05% to 0.01% unavailability), over twice as much. [note 3] A formulation of the class of 9s based on a system's unavailability would be

  8. Porosity - Wikipedia

    en.wikipedia.org/wiki/Porosity

    Porosity is a fraction between 0 and 1, typically ranging from less than 0.005 for solid granite to more than 0.5 for peat and clay. The porosity of a rock, or sedimentary layer, is an important consideration when attempting to evaluate the potential volume of water or hydrocarbons it may contain.

  9. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    In statistics, a k-th percentile, also known as percentile score or centile, is a score below which a given percentage k of scores in its frequency distribution falls ("exclusive" definition) or a score at or below which a given percentage falls ("inclusive" definition); i.e. a score in the k-th percentile would be above approximately k% of all scores in its set.