Hi User, We're facing the challenge of which hadoop version to choose. We prefer to CDH4, but have a few qustions: 1.Are MRV1 and MRV2 sharing the same hdfs? If so, can MRV1 upgrade to MRV2 smoothly? 2.If using MRV1, should our m/r code basing CDH3 be changed? 3.Is MRV1 stable enough to be used in production?
Thanks & best regards, Jing Wang
