Achieving Better Load Balance in Distributed Storage System

TheCPUprocessingspeedanddiskcapacityare increasing tremendously during the pastdecade. However, the evenfaster increasing numberof users generateshigher requirementsfor high performanceand huge capacity computer systems.More andmore applications are now running ondistributedsystems. Loadbalanceis animportant issuein distributedstorage systems.Currently, very few of themhas a finelytuned load balance scheme to achieve higher system throughput and shorter client responsetimes. We proposea new loadbalanceschemecalledCooperativeLoad BalanceScheme(CLBS)to solvethis problem.In CLBS, servers cooperatewith a client in its decisionof thenext requestby sendingtheir currentworkloadinformation to theclient everysmallamount of time. With theassistance of servers, a client can alwayschoose the light-loaded server . We did trace driven simulationexperimentsto compare CLBS with the schemeusedin a traditional distributedstorage system.Theresultsshowa shorteraverageresponsetimeanda smalleraveragequeuesizeunder bothlight andheavy workloads.