: Thanks for sharing your experience. We have multiple slaves for load : balance (performance reason) and failover(in case one server dies or : hung).
if your goal is reliability and performacne, i can't really think of many reasons why it would make senseto run multiple slaves of the same master on the same machine ... they're going to be competing for resources (ram, network i/o, file i/o, CPU, etc...) and you still have a single point of failure at the hardware level (ram, network interface, disk, cpu, motherboard, power supply, etc...) off the top of my head, the only reasons i can think of to run multiple slaves of a single ndex on the same physical machine are the same reasons ryn runs a slave on the same machine as a master: differnet config options for things that affect queries (caches, request handlers, etc...) and different rates of re-opening readers (which affects that lifespan objects in caches) -Hoss
