Eric Newton created ACCUMULO-722:
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Summary: Accumulo using Accumulo as its own NameNode
Key: ACCUMULO-722
URL: https://issues.apache.org/jira/browse/ACCUMULO-722
Project: Accumulo
Issue Type: Bug
Reporter: Eric Newton
Assignee: Eric Newton
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
|http://www.slideshare.net/acordova00/design-for-a-distributed-name-node ]
And giraffa:
[Dynamic Namespace Partitioning with Giraffa File System
|http://www.slideshare.net/Hadoop_Summit/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.
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