International Business Machines Corporation
PERFORMANCE SENSITIVE STORAGE SYSTEM UPGRADE

Abstract:

A processor may identify a storage system having a cluster of multiple nodes with redundancy for sharing a load of host input/output (IO) operations. The processor may upgrade one or more nodes at a time making use of redundancy. The processor may collect performance statistics of the storage system with the upgraded nodes during active use of the host IO operations. The processor may compare the collected performance statistics with historical performance statistics for the storage system. If the upgraded nodes show a negative performance impact, the processor may take remedial action. Otherwise, the processor may continue to upgrade the remaining nodes.