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ConfiguringforRecoverabilityObjectivesAftercompletingthislesson,youshouldbeableto:ConfigureyourdatabaseinARCHIVELOGmodeSpecifyaretentionpolicyConfiguretheFlashRecoveryAreaConfiguringYourDatabaseforBackupandRecoveryOperationsOperatethedatabaseinARCHIVELOGmode.ConfiguretheFlashRecoveryArea.Archiver(ARCn)ArchivedredologfilesOnlineredologfilesArchivedredologfilesControlfilebackupsDatafilebackupsConfiguringARCHIVELOGModePerformthefollowingstepstoplacethedatabaseinARCHIVELOGmode:UsingEnterpriseManager:Selectthe“ARCHIVELOGMode”checkbox.ClickApply.ThedatabasecanbesettoARCHIVELOGmodeonlyfromtheMOUNTstate.ClickYeswhenaskedwhetheryouwanttorestartthedatabase.UsingSQLcommands:PlacethedatabaseinMOUNTmode.IssuetheALTER

DATABASE

ARCHIVELOG

MODEcommandOpenthedatabase.SpecifyingaBackupDestinationBackupscanbewrittento:DiskdirectoryTapeusingOracleSecureBackupMediaManagementLibrary(tapedevice)Flashrecoveryarea:DiskareasetasideforbackupandrecoveryandflashbackdatabasepurposesSpecifyingaRetentionPolicyRetentionpolicy:DescribeswhichbackupswillbekeptandforhowlongTwotypesofretentionpolicies:Recoverywindow:Establishesaperiodoftimewithinwhichpoint-in-timerecoverymustbepossibleRedundancy:EstablishesafixednumberofbackupsthatmustbekeptRetentionpoliciesaremutuallyexclusive.NowSeven-dayretentionFile1File2File2needs

tobebackedup:RetentionPolicies

(notesonlypage)UsingaFlashRecoveryAreaTheFlashRecoveryAreaprovidesacentralizedlocationforcontrolfilebackups,archivedredologs,flashbacklogs,anddatabasebackups.TheFlashRecoveryAreacanbedefinedasadirectory,filesystem,orASMdiskgroup.AsingleFlashRecoveryAreacanbesharedbymorethanonedatabase.DatabaseareaFlashRecoveryAreaDefiningaFlashRecoveryAreaTheFlashRecoveryAreaisdefinedbysettingthefollowinginitializationparameters:DB_RECOVERY_FILE_DEST_SIZE:Setsthedisklimit,expressedinbytesDB_RECOVERY_FILE_DEST:SetsthelocationfortheFlashRecoveryAreaTheseparametersaredynamicandcanbealteredordisabled.DefiningFlashRecoveryArea

UsingEnterpriseManagerFlashRecoveryAreaSpaceManagementDisklimitisreachedandanewfileneedstobewrittenintotheFlashRecoveryArea12BackupfilestobedeletedDatabasefilebackup1234WarningissuedtouserFlashRecoveryAreaSpacepressureoccursRMANupdateslistoffilesthatmaybedeletedFilesthatarenolongerrequiredondiskaredeletedFlashRecoveryAreaSpaceManagement(continuednotesonly)FlashRecoveryAreaSpaceUsageConfiguretheretentionpolicytotheminimumvalueappropriateforyourdatabase.Backupthearchivelogfilesregularlyanddeletethefilesuponcompletionofthebackup.UsetheRMANREPORT

OBSOLETEandDELETE

OBSOLETEcommandstoremovebackupsandfilecopiesthatarenotrequired.MonitoringtheFlashRecoveryAreaBenefitsofUsingaFlashRecoveryAreaUsingtheFlashRecoveryAreaforrecovery-relatedfiles:SimplifiesthelocationofdatabasebackupsAutomaticallymanagesthediskspaceallocatedforrecoveryfilesSummaryInthislesson,youshouldhavelearnedhowto:ConfigureyourdatabaseinARCHIVELOGmodeSpecifyaretentionpolicyConfiguretheFlashRecoveryAreaPracticeOverviewThisprac

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