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  1. Documentation
  2. DOCS-12542

Reclaiming space after resizing Oplog

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Minor - P4
    • Resolution: Unresolved
    • Affects Version/s: 3.6
    • Fix Version/s: None
    • Component/s: manual, Server
    • Labels:
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      Description

      Description

      The documented procedure to "Compact oplog.rs to reclaim disk space" might be improved on a couple points.

      1. It implies, but does not make crystal-clear, that the compact operation must be performed only on SECONDARY members. I am working now with a customer who has been confused by this. (00551858)
      2. The recommended step rs.stepDown() may not always work as expected in replica sets with asymmetric priorities. In a P-S-S with priorities 5, 2, and 1, when you `stepDown()` the primary, it will quickly initiate a priority-takeover, and "step back up".

      Scope of changes

      • Specify in first paragraph that you must run compact against secondaries only
      • Revise rs.stepdown to specify a stepdown timeout of 120 seconds (to ensure a high-priority primary does not immediately re-elect itself)

      Impact to Other Docs

      MVP (Work and Date)

      Resources (Scope or Design Docs, Invision, etc.)

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            • Assignee:
              Unassigned
              Reporter:
              mark.brinsmead Mark Brinsmead
              Participants:
              Last commenter:
              Kay Kim
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              Dates

              • Created:
                Updated:
                Days since reply:
                23 weeks, 2 days ago