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MapReduce >> mail # user >> Question about namenode HA


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Question about namenode HA
Hi Todd and other HA experts,

I've two question:

1) why the zkfc is a seperate process, i mean, what's the primary design consideration that we didn't integrate zkfc features into namenode self ?

2) If i deploy CDH4.1(included QJM feature),  since QJM can do fencing writer,  so can i just config like this safely ?
        <name>dfs.ha.fencing.methods</name>
        <value>shell(/bin/true)</value>

Thanks,
Liang
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB