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Write procedure using estimated best setting in first run

  • US 9,927,982 B2
  • Filed: 08/18/2017
  • Issued: 03/27/2018
  • Est. Priority Date: 04/17/2012
  • Status: Active Grant
First Claim
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1. A computer program product for implementing write procedures using an estimated best setting in a first run, the computer program product comprising a computer readable storage medium having program instructions executable by a tape drive to cause the tape drive to perform a method comprising:

  • receiving, at the tape drive, a request for a write operation to be performed in the tape drive;

    determining, by the tape drive, an expected transaction size of a next write operation;

    comparing, by the tape drive, the expected transaction size of the next write operation to each of a first transaction size threshold and a second transaction size threshold in response to receiving the request;

    determining, by the tape drive, an optimum a write procedure based at least in part on the comparison; and

    invoking, by the tape drive, the optimum write procedure in response to determining the optimum write procedure,wherein the first transaction size threshold is greater than the second transaction size threshold, andwherein the optimum write procedure is one of a plurality of candidate write procedures selected from;

    a backhitch write procedure, a same wrap backhitchless flush (SWBF) write procedure, and a recursively accumulating backhitchless flush (RABF) write procedure.

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