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  1. Cassandra
  2. CASSANDRA-4292

Improve JBOD loadbalancing and reduce contention

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Details

    • Improvement
    • Status: Resolved
    • Normal
    • Resolution: Fixed
    • 1.2.0 beta 1
    • None
    • None

    Description

      As noted in CASSANDRA-809, we have a certain amount of flush (and compaction) threads, which mix and match disk volumes indiscriminately. It may be worth creating a tight thread -> disk affinity, to prevent unnecessary conflict at that level.

      OTOH as SSDs become more prevalent this becomes a non-issue. Unclear how much pain this actually causes in practice in the meantime.

      Attachments

        1. 0001-Fix-writing-sstables-to-wrong-directory-when-compact.patch
          2 kB
          Yuki Morishita
        2. 4292.txt
          20 kB
          Yuki Morishita
        3. 4292-v2.txt
          68 kB
          Yuki Morishita
        4. 4292-v3.txt
          71 kB
          Yuki Morishita
        5. 4292-v4.txt
          32 kB
          Yuki Morishita

        Activity

          People

            yukim Yuki Morishita
            jbellis Jonathan Ellis
            Yuki Morishita
            Jonathan Ellis
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            Dates

              Created:
              Updated:
              Resolved: