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MapReduce >> mail # user >> question about move hadoop from A to B


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question about move hadoop from A to B
hi ,all:
        here A ,B means boxes,i have to do hardware upgrade ,so must move
the hadoop from old machine to new machine then turn off the old boxes
and the bussiness can not stop,what i think is add new machine
to cluster ,it's easy for datanode ,but how can i replace the old NN and RM
with new ones?
any one has a good idea??
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