I have written a rack awareness script which maps the IP addresses to rack names in this way.
10.31.1.* -> /room1/rack1 10.31.2.* -> /room1/rack2 10.31.3.* -> /room1/rack3 10.31.100.* -> /room2/rack1 10.31.200.* -> /room2/rack2 10.31.200.* -> /room2/rack3 I understand that DFS will try to have replication of data in such a manner that even if /room1/rack1 goes down, the data is still available in other racks. I want to understand whether the hierarchy of racks (like rack1 is in room1 here) is given any importance. What I mean is, in addition to taking care that the data is unaffected if /room1/rack1 goes down, will it also try to take care that almost all data is replicated in the racks withiin /room2 so that if /room1 goes down as a whole (say there is a power cut in room1), we still have all the data in racks of /room2?
