On Mar 25, 2009, at 12:07 PM, Sangmin Lee wrote:
Many (and probably most) users of hadoop are using hdfs for batch  
processing.
As a result HA for name node has not received as high a priority as  
other projects since
batch jobs can wait while the name node is restarting.
Clearly this is not acceptable for non-batch use of hdfs.
Suresh has a rough prototype of HA'ed Namenode using linux HA that he  
is planning put in contrib one of these days (it is low priority
background task for him).

Sorry that I don't have a better answer.

sanjay

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