1. Accumulo
  2. ACCUMULO-722

Accumulo using Accumulo as its own NameNode


    • Type: Improvement Improvement
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Won't Fix
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:


      On large clusters, the NameNode can become a performance bottleneck. The NameNode is also a single-point of failure. Recent improvements to HDFS to support High Availability and Federation [See ACCUMULO-118] help address these issues, but at greater administrative costs and specialized hardware.

      We have seen demonstrations of using HBase to host a NameNode. There's Aaron Cordova's example of a Distributed Name Node:

      Design for a Distributed Name Node

      And giraffa:

      Dynamic Namespace Partitioning with Giraffa File System

      We could incrementally implement a self-hosted Accumulo, which would run as its own NameNode. This would be useful for large Accumulo installations. Over the long term, we could incorporate all NameNode functions to provide a scalable, distributed NameNode for other large Hadoop installations.

      Hopefully the approach used could be trivially ported to HBase as well.

        Issue Links


          Christopher Tubbs made changes -
          Fix Version/s 1.7.0 [ 12324607 ]
          Eric Newton made changes -
          Status Open [ 1 ] Resolved [ 5 ]
          Resolution Won't Fix [ 2 ]
          Eric Newton made changes -
          Link This issue is related to ACCUMULO-118 [ ACCUMULO-118 ]
          John Vines made changes -
          Fix Version/s 1.7.0 [ 12324607 ]
          Fix Version/s 1.6.0 [ 12322468 ]
          Eric Newton made changes -
          Assignee Eric Newton [ ecn ]
          John Vines made changes -
          Issue Type Bug [ 1 ] Improvement [ 4 ]
          Eric Newton made changes -
          Field Original Value New Value
          Fix Version/s 1.6.0 [ 12322468 ]
          Eric Newton created issue -


            • Assignee:
              Eric Newton
            • Votes:
              2 Vote for this issue
              12 Start watching this issue


              • Created: