Optimized rolling restart of stateful services to minimize disruption

A system for controlling operation of a plurality of server computer systems, the system comprising a processor, memory accessible by the processor, and computer program instructions stored in the memory and executable by the processor to perform:

• determining an order in which the plurality of server computer systems is to be restarted;
• and
• restarting each of the plurality of server computer systems sequentially according to the determined order;
• wherein a leader of the server computer systems receives and handles write requests for the plurality of server computer systems, and wherein the leader server computer system is restarted last.

A computer program product for controlling operation of a plurality of server computer systems, the computer program product comprising a non-transitory computer readable storage having program instructions embodied therewith, the program instructions executable by a computer, to cause the computer to perform a method comprising:

• determining an order in which the plurality of server computer systems is to be restarted;
• and
• restarting each of the plurality of server computer systems sequentially according to the determined order;
• wherein a leader of the server computer systems receives and handles write requests for the plurality of server computer systems, and wherein the leader server computer system is restarted last.