i want to put a 1:1 elastic cluster inside my hadoop cluster, 1 elastic node on each hadoop datanode.
to not interfere too much with the hadoop cluster, i would like to run the elastic nodes on a disk of it's own.
datanode disk layout(in mounted dirs):
20+ data nodes
say i wish to remove disk10 from each datanode, how do i do that without data loss?
removing the disk on a decommissioned datanote, and later recomissioning it, takes too long time. - any hint on making this process faster?
can i use the rebalancer? ( i saw there is internal datanode balancer in CDH5.8)