Specifications

DS300f G2 Series User Manual
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features and settInGs
Features and Settings include the following functions:
• AutomaticLoadBalancingforFailoverPolicy
• LoadBalancePolicy
• PathVerication
• PDORemoval
• PerformanceTabRefreshRate
• Round Robin Count
• Refreshing the Objects
• ViewingSystemInformation
• SavingSystemInformation
automatIc loaD balancInG for faIlover PolIcy
TheASUSStorageMPIOsolutioncanloadbalancethepathsforyourLUNswith loadbalancepolicysetto
Failover.
WithAutomaticLoadBalancingenabled,theLUNssettoFailoverpolicyareautomaticallyredistributedamong
all available paths when:
• A path fails
• Afailedpathcomesbackonline
• A new path is added
AutomaticLoadBalancing,whenenabled,providesoptimaldatathroughputforLUNssettoFailoverpolicy.
NotethatAutomaticLoadBalancinghasNOeffectuponLUNssettoRoundRobin,RoundRobinwithSubset,
orLeastQueueDepth.
enAbling AutoMAtic loAd bAlAncing
Toenableautomaticloadbalancing:
FromtheOperationsmenu,chooseAutoLoadBalance.
WhenyouseeacheckmarkbesideAutoLoadBalanceintheOperationsmenu,thisfeatureisenabled.
See also:
• ViewingLUNProperties
• ViewingLUNPerformanceStatistics
• LoadBalancePolicy
loaD balance PolIcy
LoadBalancePolicyisamethodofequalizingtheI/Otrafcovereachpathbysystematicallydividingtheload
amongmultiplepaths.
• FailoverPolicy–Noloadbalancing.WithAutomaticLoadBalancingdisabled,therstpathdiscoveredisthe
primarypath.I/Osfollowtheactivepathuntilitfails,thentheychangetonextavailablepath.EachLUN
usesonlyoneactivepath.
See AutomaticLoadBalancingforFailoverPolicy.
• RoundRobinPolicy–I/Osfollowallactivepaths,changingpathsatthespeciedI/Ocount.Youcansetthe
I/OcountintheGeneraltaboftheAdvancedSettingsdialogbox.
IfLUNAfnityisenableddoNOTuseRoundRobin.See“MakingControllerSettings”onpage59or
page124.
• RoundRobinwithSubsetPolicy–Oneormorepathsaredesignatedasstandby.I/Osfollowallactivepaths,
changingatthespeciedI/Ocount.YoucansettheI/OcountintheGeneraltaboftheAdvancedSettings
dialogbox.
IfLUNAfnityisenabled,youcanuseRoundRobinwithSubset.See“MakingControllerSettings”on
page59orpage124.
• LeastQueueDepthPolicy–I/Osfollowthepathwiththeleastnumberofrequestsqueued.
NotethatyoucanenableAutomaticLoadBalancingforLUNswithpolicysettoFailover.SeeAutomaticLoad
BalancingforFailoverPolicy.
chAnging loAd bAlAnce Policy settings
Tochangeloadbalancepolicysettings:
1. Do one of the following actions:
•
FromtheOperationsmenu,chooseChange Load Balance Policy.
• InTreeView,highlightaLUN andclicktheChangeLoadBalancePolicy icon.
• InTreeView,right-clickaaLUN andchooseChange Load Balance Policyfromthepopupmenu.
TheChangeLoadPolicydialogboxappearswiththeLoadBalancePolicytabdisplayed.