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Method, apparatus, and storage medium for writing data into persistent storage device

  • US 10,007,446 B2
  • Filed: 05/05/2015
  • Issued: 06/26/2018
  • Est. Priority Date: 05/05/2015
  • Status: Active Grant
First Claim
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1. A method for writing data into a persistent storage device, comprising:

  • collecting at least one modified data entry from each of at least two storage units in a temporary storage device, each of the at least two storage units containing the at least one modified data entry and at least one unmodified data entry, the at least one modified data entry being at least one data entry that has been modified in the temporary storage device;

    grouping the modified data entries from the at least two storage units in the temporary storage device to form a data unit, such that the data unit has a size equal to an integer multiple of a size of an access unit of the persistent storage device; and

    writing the data unit into the persistent storage device at one time as a whole unit,whereincollecting the at least one modified data entry includes collecting at least one mapping entry in the temporary storage device from each of at least two mapping units; and

    the data unit includes mapping entries from mapping units at different levels of a mapping table.

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