Hi, We are planning to upgrade our production hdfs cluster from 1.0.4 to 1.2.1
So if I directly upgrade the cluster, it won't affect the edits, fsimage and checkpoints? Also after upgrade is it will read the blocks, files from the data nodes properly? Is the version id conflict occurs with NN? Do I need lose the data after upgrade? Thanks in advance. Appreciate your response. -Viswa.J
