HBase supports in-place upgrades. Almost* all version upgrades have been relatively painless if you have automation to do the necessary operations across a clus

HBase supports in-place upgrades. Almost* all version upgrades have been relatively painless if you have automation to do the necessary operations across a cluster of nodes. Hadoop upgrades have been a similar story. That minimum automation necessary is high for all stateful data stores of this size. * A few notable exceptions exist where Hadoop and HBase upgrades were necessary simultaneously. These have been awful experiences that required huge efforts to accomplish.