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From "Saikat Kanjilal (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6959) Provisioning of long running Services via HOD
Date Mon, 20 Sep 2010 03:41:33 GMT
Provisioning of long running Services via HOD
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                 Key: HADOOP-6959
                 URL: https://issues.apache.org/jira/browse/HADOOP-6959
             Project: Hadoop Common
          Issue Type: New Feature
         Environment: Should work on any environment
            Reporter: Saikat Kanjilal
            Priority: Minor


Work on a computation model for services on the grid. The model would include:
Various tools for defining clients and servers of the service, and at the least a C++ and
Java instantiation of the abstractions
Logical definitions of how to partition work onto a set of servers, i.e. a generalized shard
implementation
A few useful abstractions like locks (exclusive and RW, fairness), leader election, transactions,
Various communication models for groups of servers belonging to a service, such as broadcast,
unicast, etc.
Tools for assuring QoS, reliability, managing pools of servers for a service with spares,
etc.
Integration with HDFS for persistence, as well as access to local filesystems
Integration with ZooKeeper so that applications can use the namespace

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