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  1. Core Server
  2. SERVER-21920

Use enhanced WiredTiger next_random cursors for oplog stones

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.2.1, 3.3.0
    • Component/s: Storage
    • Labels:
    • Backwards Compatibility:
      Fully Compatible
    • Backport Completed:
    • Sprint:
      QuInt E (01/11/16)

      Description

      The basic implementation of WiredTiger random cursors doesn't do a very good job if the tree is unbalanced.

      There is an enhanced next_random implementation that gives a pseudo random set of keys distributed somewhat evenly across the file. In order to use the new functionality it's necessary to tell WiredTiger approximately how many samples are going to be taken.

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                  Updated:
                  Resolved: