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  1. Solr
  2. SOLR-6760

New optimized DistributedQueue implementation for overseer

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 5.4, 6.0
    • Component/s: SolrCloud
    • Labels:
      None

      Description

      Currently the DQ works as follows

      • read all items in the directory
      • sort them all
      • take the head and return it and discard everything else
      • rinse and repeat

      This works well when we have only a handful of items in the Queue. If the items in the queue is much larger (in tens of thousands) , this is counterproductive

      As the overseer queue is a multiple producers + single consumer queue, We can read them all in bulk and before processing each item , just do a zk.exists(itemname) and if all is well we don't need to do the fetch all + sort thing again

        Attachments

        1. SOLR-6760-branch_5x.patch
          59 kB
          Shalin Shekhar Mangar
        2. SOLR-6760.patch
          58 kB
          Scott Blum
        3. SOLR-6760.patch
          58 kB
          Scott Blum
        4. SOLR-6760.patch
          57 kB
          Scott Blum
        5. SOLR-6760.patch
          57 kB
          Scott Blum
        6. deadlock.patch
          56 kB
          Scott Blum

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              • Assignee:
                shalinmangar Shalin Shekhar Mangar
                Reporter:
                noble.paul Noble Paul
              • Votes:
                4 Vote for this issue
                Watchers:
                11 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: