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  1. Lustre
  2. LU-17818 LMR: Lustre Metadata Redundancy
  3. LU-18823

LMR1b: Replicate MDT0000 Services to Other MDS

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    • Icon: Technical task Technical task
    • Resolution: Unresolved
    • Icon: Minor Minor
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    • 9223372036854775807

      Replicate and/or allow services running on MDT0000 to other MDTs/MDSes:

      • FID Location Database (FLDB) replication, controls FID meta-sequence mapping to MDTs and OSTs, changes very rarely
      • Quota Master Target (QMT), that controls quota limits which change only infrequently. Quota usage that is changing continuously can be reconstructed from the MDTs and OSTs directly in case of a failover.
      • flock DLM locking, in-memory only, possibly just reconstructed like normal MDT0000 failover and lock recovery, but on another MDS
      • group DLM locking, in-memory only, possibly just reconstructed like normal MDT0000 failover and lock recovery, but on another MDS

            wc-triage WC Triage
            adilger Andreas Dilger
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              Created:
              Updated: