RadiSys ATCA-4616 Dokumentacja Pobierz pdf (Strona 32)

Software Architecture

InadditiontotheHPIdata,automaticoperationsaresynchronizedwiththepeerHPIservers

tokeepHPIdatabasesinsync.Theseoperationsarecalledbythefollowingfunctionsandare

onlysynchronizedwiththestandbyHPIserverwhentheHPIapplicationmakestherequestto

theactiveHPIserver.

•

saHpiDiscover()–Thisfunctionovercomespotentiallatenciesinthehot‐swapmechanism

andkeepstheresourcepresencetable(RPT)updated.Thisoperationissynchronizedto

thepeerHPIserversoitcanupdateitsRPT.

Note:ThesaHpiDiscover()functionisnotmeanttoperformanyinitializationordiscovery

actionsandshouldnotbeusedforanHPIimplementation.However,thefunctioncanbe

usedindebugsituations(refertoTable 15onpage 126forexamples).

• saHpiEventLogClear()–ThisfunctionclearsthespecifiedHPIeventloginbothactiveand

standbyHPIservers.

• saHpiParmControl()–Thisfunctionsavescustomconfigurationsforresources.The

configurationsaresynchronizedwiththepeerHPIservertoensurelocalHPIconfiguration

filesareupdated.

DuringHPIserverinitialization,thestandbyHPIserversendsarefreshrequesttotheactive

HPIserveroverthesynchronizationmedium.Uponreceptionofthisrequest,theactiveHPI

serversendsanydatathatneedstobesynchronizedtothestandbyHPIserver.Thestandby

HPIserverbecomesfullyinitializedandtheHPIservicebecomesfullyredundantoncethe

refreshsyncwiththeactiveHPIser veriscompleted.

ThedynamicredundancybetweentheactiveandstandbyHPIserversenablethesystem

managertogetaconsistentviewoftheRadisyssystemregardlessoffailovers,andensures

thatasystemmanagementinterfaceisalwaysavailable.

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RadiSys ATCA-4616 Dokumentacja Strona 32