Split mirror concepts | HP B6960-96035 guide

274	Split mirror concepts

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HP B6960-96035 manual Split mirror concepts

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HP Data Protector A.06.10 Concepts guide Page Contents Planning your backup strategy Types of incremental backups Media management and devices 133 Users and user groups 183 Service management 205 Data Protector internal database 187 How Data Protector operates 219 Integration with database applications 237 Synthetic backup 257 Direct backup 243Disk backup 253 This chapter 265 Overview Supported configurations 269 Snapshot concepts 275 Microsoft Volume Shadow Copy service 289Backup scenarios 297 Further information 331 Glossary 345 Index 403 Figures 149 Backup session information flow multiple sessions Page Page Tables Page Page Edition history Publication historyPart number Guide edition Product Publication history Documentation set About this guideIntended audience Guides HP Data Protector disaster recovery guide HP Data Protector installation and licensing guideHP Data Protector troubleshooting guide HP Data Protector integration guides HP Data Protector zero downtime backup integration guide HP Data Protector zero downtime backup concepts guideHP Data Protector zero downtime backup administrators guide HP Data Protector integration guide for HP Reporter HP Data Protector Media Operations users guide HP Data Protector command line interface referenceOnline Help This guide fulfills a similar function for Media Operations Abbreviations Documentation mapGuide Map Abbreviation Guide Integrations Integration Guide Document conventions Document conventions and symbolsConvention Element Provides additional information Data Protector graphical user interfaceProvides helpful hints and shortcuts General information HP technical support Data Protector graphical user interface Documentation feedback Subscription serviceHP websites For additional information, see the following HP websites This chapter About backup and Data ProtectorAbout Data Protector High Availability Support Page What is a backup? Introducing backups and restoresThis section explains basic backup and restore concepts What is a restore? Backing up a network environment Direct backup Data Protector architecture Data Protector cell physical view and logical view Cell Manager Operations in the cell Systems with backup devicesInstallation Server Systems to be backed up What is a backup session? Backup sessionsHow does it work? Restore sessions What is a restore session? Enterprise environments What is an enterprise environment?When to use an enterprise environment Splitting an environment into multiple cells Why split large environments into multiple cells? MoM Manager-of-Managers environment Media management What is a media pool?Media management functionality Backup devices User interfaces Data Protector GUIPage Data Protector Java GUI Original Data Protector GUI Data Protector Java GUI architecture Benefits of Java GUI Differences from the Original Data Protector GUI Overview of tasks to set up Data Protector Install and configure your Data Protector environment Clustering on Planning your backup strategyDisaster recovery on Restoring data on Defining the requirements of a backup strategy Backup strategy planningWhat is backup strategy planning? Page Factors influencing your backup strategy Preparing a backup strategy planPage Planning cells One cell or multiple cells?Page Installation Servers and the Cell Manager Installing and maintaining client systemsCreating cells in the Unix environment Windows domains Creating cells in the Windows environmentMapping a Data Protector cell into a Windows domain Windows workgroups Creating cells in a mixed environmentGeographically remote cells Considerations for geographically remote cells Infrastructure Network versus local backupsUnderstanding and planning performance MoM environment Devices Network or server versus direct backupsDevice performance When to use parallelism Advanced high performance configurationUsing hardware in parallel High performance hardware other than devices Software compression Configuring backups and restoresHardware compression Disk image versus filesystem backups Full and incremental backupsObject distribution to media Disk fragmentation Disk image backupsDisk performance Compression SAN performance What is security?Planning security Online database application performance Cells Data Protector users accounts Data Protector user groups Data Protector user rights How Data Protector AES 256-bit encryption works Visibility of backed up dataData encryption Hiding data from other users Backup session with AES 256-bit encryption How Data Protector drive-based encryption works Restore from encrypted backups What is backup ownership?Who owns a backup session? Clustering Backup ownership and restoreWhat is a cluster? Cluster concepts Shared disks Cluster nodesCluster network What is a virtual server? What is a package or group?What is a failover? High availability of the Data Protector Cell Manager Automatic restart of backupsCluster support Load balancing at failover This section gives three example cluster configurations Cell Manager installed outside a clusterExample cluster environments Cell Manager installed outside a cluster Virtual server backup Condition Backup behaviorResult Virtual server backup Condition Result FC/SCSI MUX Virtual server backup Failover before a backup starts Comparison of full and incremental backup Full and incremental backupsIncremental backup Synthetic backup Full backupsIncremental backups Full backup Incremental backup Enhanced incremental backup Conventional incremental backupTypes of incremental backups Backup saves all changes since the last Incr4 backup. An Level that is still protected. For example, an Incr1 backupIncr1-9 backup never references an existing Incr backup Incremental backups Relative referencing of backup runs How to read on Considering restoreExamples TIP Media needed to restore from leveled incremental backups Data protection What is data protection?Keeping backed up data and information about the data Data Protector Internal Database What is logging level? Browsing files for restoreWhat is catalog protection? Catalog protection Enabling the restore of files, but not browsing Enabling the browsing of files and quick restoreOverwriting backed up files with new data Backing up data Exporting media from a cell What is a backup specification? Creating a backup specificationSelecting backup objects How to create a backup specification Examples of backup options What is a media set? Backup types and scheduled backupsWhat is an object mirror? Object mirrors Backup session Scheduling, backup configurations, and sessionsBackup configuration Optimizing backup performance Optimizing for restore When to schedule backupsStaggering full backups Staggered approach Full backup with daily simple incremental backups Example Full backup with daily level 1 incremental backups Considerations for unattended backups Automated or unattended operationPage Data Protector data duplication methods Duplicating backed up dataObject copy Object mirror Media copy Smart Media Copy What is object copy? Copying objects Start of object copy session Post-backup object copyingScheduled object copying Selection of the media set to copy from Selection of devicesObject copy session performance Vaulting Why use object copy?Freeing media Freeing media Demultiplexing of media Migration to another media type Consolidating a restore chainDisk staging What is object mirroring? Object mirroring Benefits of object mirroring Object mirror operation Backup performance Object mirroring What is the result? What is media copying?How to copy media Copying media Automated media copying What is automated media copying?Post-backup media copying Scheduled media copying What happens after the backup? Smart media copying using VLSWhat is smart media copying? Automated smart media copying Factors affecting restore duration Restore durationRestoring data Selection of devices Selection of restore chainSelection of the media set Media set selection algorithm When to use this policy Operators are allowed to restoreWhat needs to be done Disaster recovery End users are allowed to restorePage Disaster recovery methods Recovery methods supported by operating system vendors Alternative disaster recovery methodsRecovery using third-party tools for Windows 132 Planning your backup strategy Media pools on Media management and devicesMedia management on Media life cycle on Devices on Media life cycle Typical media life cycle consists of the following steps See Calculating media condition on Media poolsConcepts guide 135 Media pool property examples How to use media poolsMedia pools and dcbf directories Default media pools Free pools When is a free pool used? What is a free pool?Free pool benefits Media quality calculation Free pool propertiesFree pool limitations Media pool usage examples Simple one device/one media pool relation Configuration of media pools for large libraries Multiple devices, single media pool What is a media rotation policy? Implementing a media rotation policy Automatic media rotation and media handling Media rotation and Data ProtectorMedia needed for rotation Estimating the quantity of needed media Initializing or formatting media Media management before backups beginWhat is initializing formatting media? Labeling Data Protector media Location field How are labels used? Media management during backup sessions Selecting media for backups Media usage policy Adding data to media during backup sessionsMedia condition Distributing objects over media Multiple objects and sessions per medium, sequential writes Calculating media condition Writing data to several media sets during backupMedia condition factors What is vaulting? Media management after backup sessionsVaulting Implementing vaulting Vaulting usage example Restoring from media in a vault Using devices with Data ProtectorDevices Concepts guide 153 Library management console support TapeAlert Device lists and load balancing Device streaming and concurrency What is device streaming?How to configure device streaming How load balancing works Increased performance Segment sizeDisk agent concurrency Multiple data streams Block size Data format Device locking and lock names Number of disk agent buffersDevice names Preventing collision Standalone devicesPhysical device collision What are standalone devices? Small magazine devices Handling of media Configuring a libraryLarge libraries Size of a library Barcode support Sharing a library with other applicationsEnter / eject mail slots Advantages of barcodes What is library sharing? Cleaning tape supportSharing a library with multiple systems Connecting drives to multiple systems Control protocols and Data Protector Media Agents Drive control protocol Drive controlRequired Data Protector Media Agent for drive control Ndmp Scsi ADIC/GRAU Exemplary configurationsRequired Data Protector Media Agent for robotic control Scsi Ndmp ACS 168 Media management and devices Sharing a Scsi library robotics attached to an Ndmp Server Data Protector and Storage Area Networks Sharing an ADIC/GRAU or StorageTek ACS library Storage Area Networks Fibre Channel Storage Area Network Point-to-point topology Loop topology Switched topology Loop initialization protocol Device sharing in SAN Configuring multiple paths to physical devicesConcepts guide 175 Why use multiple paths Path selection Device locking with multiple applications Device lockingBackward compatibility Device locking within Data Protector Indirect and Direct Library Access Indirect Library Access Direct Library Access Indirect Library Access Device sharing in clusters Static drives Floating drives Concepts guide 181 182 Media management and devices Increased security for Data Protector users Access to backed up dataUsers and user groups Visibility of backed up data Users and user groups Default administratorsPredefined user groups User group Access rights Using predefined user groupsFollowing default groups are provided by Data Protector Data Protector predefined user groups 186 Users and user groups Data Protector internal database About the IDB IDB location IDB on the Windows Cell ManagerIDB size and growth consideration IDB format IDB on the Unix Cell Manager IDB architectureIDB in the Manager-of-Managers environment Underlying technology Media Management Database MmdbMmdb records Mmdb location Catalog Database CDBMmdb size and growth CDB records CDB location Detail Catalog Binary Files DcbfSize and growth for CDB objects and positions Dcbf information Smbf records Session Messages Binary Files SmbfDcbf location Smbf size and growth IDB operation During backupServerless Integrations Binary Files Sibf During object copying or object consolidation During restoreExporting media Removing the detail catalog IDB configurationOverview of IDB management Filenames purge IDB growth and performance IDB maintenanceIDB recovery Key IDB growth and performance factors IDB growth and performance key tunable parameters Logging level as an IDB key tunable parameter Concepts guide 199 Logging level and restore speed Logging level and browsing for restoreImpact on performance Recommended usage of logging level and catalog protection Catalog protection and restoreCatalog protection as an IDB key tunable parameter Expired catalog protection Different logging levels for object copies Use different logging levels in the same cellSpecifics for small cells Specifics for large cells IDB size estimationOn the Windows Cell Manager 204 Overview Service managementIt is organized as follows Overview on Data Protector and service management Key functions Native Data Protector functionalityConcepts guide 207 What Is ARM? Application Response Measurement version 2.0 ARM 2.0 API ARM functionality Monitor Integration with HP Operations Manager softwareSnmp traps Functionality of the Data Protector OM integration Reporting and notification Event logging and notification Reporting and notification examples Java-based online reporting Windows application logData Protector log files Central management, distributed environment Data Protector checking and maintenance mechanismUsing the data provided by Data Protector What can I do with the data? Backup Session Reports Concepts guide 215 Service management integrationsData Protector OM-R integration Data Protector Reporter example Operational error status report Data Protector OM SIP Direct SIP integration example Systems, the system inet daemon Inetd starts the Data Data Protector processes or servicesHow Data Protector operates Protector Inet process MMD Backup sessionsCRS RDS Scheduled backup session Scheduled and interactive backup sessionsBackup session data flow and processes Interactive backup session Backup session information flow How many sessions can run concurrently? Pre-exec and post-exec commands On page 223 shows multiple sessions running concurrently Queuing of backup sessions Mount requests in backup sessions Restore sessions Backing up with disk discovery Restore session data flow and processes What happens in a restore session? Queuing of restore sessions How many restore sessions can run concurrently? What is a parallel restore? Mount requests in a restore sessionParallel restores How does it compare to a standard restore? Fast multiple single file restore Object copy sessions Automated and interactive object copy sessions Object copy session data flow and processes How many sessions can run concurrently? Queuing of object copy sessions Mount requests in an object copy session Automated and interactive object consolidation sessions Object consolidation sessionsObject consolidation session data flow and processes Queuing of object consolidation sessions Mount requests in an object consolidation session Media management sessionsMedia management session data flow How many sessions can run? Integration with database applications Overview of database operation Relational database Filesystem backup of databases and applications Online backup of databases and applications Data Protector integration with databases Concepts guide 241 242 Direct backup Requirements and support on Supported configurations on Configurations on Direct backup benefits How direct backup worksBackup types Direct backup architecture Environment About resolve About XCopy Backup stages for data files Direct backup process flowXCopy + Resolve There are two restore options when using direct backup RestoreRequirements and support Supported configurations Three hosts CM, application, Resolve Two Hosts Cell Manager/Resolve Agent and application Basic configuration single hostConcepts guide 251 252 Disk backup Disk backup benefits on Data Protector disk-based devices on Disk backup benefits File jukebox device Data Protector disk-based devicesStandalone file device File library device Data format Recommended disk-backup deviceConfiguration Backing up to a disk device Synthetic backup Concepts guide 257 How Data Protector synthetic backup works Synthetic backup benefitsSynthetic backup brings the following benefits Synthetic backup Restore and synthetic backup Synthetic backup and media space consumption Full and incremental backups Regular synthetic backup Page 264 Split mirror concepts Split mirror backup concept Instant recovery ZDB to disk Backup clients and clustersZDB to tape and ZDB to disk+tape Replica set rotation Local mirror dual host Concepts guide 269 Local mirror single host Remote mirror Split mirror remote mirror LAN-free remote backup data HA Concepts guide 271 Local/remote mirror combination Other configurations 274 Split mirror concepts Snapshot concepts Storage virtualization Snapshot concepts RAID Snapshot backup Snapshot backup types Types of snapshots Instant recoveryReplica set and replica set rotation Snapshots with the preallocation of disk space Snapshots without the preallocation of disk space Snapclones Basic configuration single disk array dual host Other supported configurations Multiple disk arrays dual host Multiple application hosts single backup host Disk arrays single host LVM mirroring HP StorageWorks Virtual Array only 286 Page 288 Microsoft Volume Shadow Copy service What is a writer? What is a shadow copy?What is a shadow copy provider? Data Protector and VSS Actors of the traditional backup model Benefits of using VSS Data Protector Volume Shadow Copy integrationVSS benefits VSS backup VSS restore VSS filesystem backup and restore Backup and restore This appendix Backup scenariosConsiderations 298 Environment Company XYZHardware and software environment of XYZ Current XYZ backup topology Problems with the current solution Backup strategy requirements Requirements Proposed environment Proposed solutionSolution overview Department Current Data Projected Data Devices 5 Years Proposed solution in detail Proposed XYZ backup topology Estimating the size of the IDB Input parameters Page Staggering approach Time Remote full backups to the HP DLT 4115 libraryDepartment Current Data/Backup Time ENG1BS Admbs ENG2BSOthbs Dbbs Restore options 312 Backup scenarios Company ABC Size of backup environment#UX Current ABC Cape Town backup topology Type of data Maximum downtime Problems with current solutionMaximum acceptable downtime for recovery Concepts guide 315 Amount of data to be backed up How long data should be keptType of data Max data storage time Location Amount of data to be backed up in five years ABC enterprise environment ABC cell configuration Why configure into seven cells?Why use the CMMDB? #UNIX Why choose the Windows system? ABC Cape Town enterprise backup environment 322 Why use the HP StorageWorks DLT 4228w Library? Why use the HP StorageWorks DAT24 Autoloader? Why use the HP StorageWorks DLT 4115w Library?How long does a full backup last? Media pool name Location Description ABC’s Media Pool UsageConcepts guide 325 Why use differential incr1 backups? Staggering Approach for ABC Cape Town SERVERSA...G ABC’s backup specification configurationName Cell Description Backup day Time USERSD...G Backup options Page 330 What is a backup generation? Backup generationsFurther information Backup generations Examples of automated media copying Incr1 backup Example 1 automated media copying of filesystem backupsConfiguring backups Configuring automated media copying Full backup Concepts guide 335 336 Full backup and automated media copying Example 2 automated media copying of Oracle database backups Full database backup and automated media copying Internationalization Localization File name handling Background Browsing file names File name handling during backupFile name handling during restore Unix incompatibility examplePage 344 Acsls GlossaryAML Lotus Domino Server specific term Lotus Domino Server See also online redo logSee library See also Virtual Library System VLS and virtual tape See restore chainBackint See also backup specification, incremental backup, and full Backup Backups/templates. Default view Backup typesBackup view By Group according to the group to which backup Manual and disaster and recovery Or development. When used for backup purposes, the originalOr BCV devices, are dedicated SLDs that are pre-configured SAP R/3 specific term An SAP R/3 backup tool that allows Non-database files saved with Brbackup Restore files of the following typeSaved with Brbackup You can specify files, tablespaces, complete backups, log See also Mmdb CAPCDB See also MoM See also backup to IAP Microsoft Exchange Server and Lotus Domino Server specific Replication See also Exchange Replication Service and local continuousMicrosoft Exchange Server specific term Cluster continuous Informix Server specific term a Windows CMD script that is VLS HP StorageWorks EVA specific term The user interface thatCV EVA Oracle and SAP R/3 specific term An Oracle data file that Oracle and SAP R/3 specific term a physical file created by CSMHP StorageWorks EVA specific term a logical grouping Informix Server specific term An Informix Server physical See also backup typesSee also copy set Dcbf Microsoft SQL Server specific term a database backup that See also incremental backupSee also XCopy engine Veritas Volume Manager specific term The basic unit of data DMZ See also virtual full backupDR OS See Symmetrix Agent Syma See client backup with disk discoveryEMC Symmetrix Specific term See also importing media Microsoft Exchange Server specific term The MicrosoftSee also library See also CA+BC EVA Bi-directional transmission of large data files and can be Backup mediaVolume and each of these copies can have additional two Allows any server to perform replication activity Full backup Flash recoveryRun out of media. The media pools must be configured to use Backup Full ZDB GUI HSM EVA provider LdevReplica SMI-S EVA EMC Symmetrix specific term EMCs Symmetrix Integrated Microsoft Exchange Server specific term a backupIcda IDB Pair. However, the standard devices are updated with Incremental restoreBCV control operations, an incremental restore reassigns a Devices are updated with only the data that was written to See formatting See also replica, zero downtime backup ZDB, ZDB to diskZDB to disk+tape KMS See also Information Store and Site Replication ServiceIsql LBO LISTENER.ORA Microsoft Exchange Server specific term Local continuous Service LVM Oracle and SAP R/3 specific term The format of the loginMicrosoft SQL Server specific term The name a user uses to See Wake Onlan CA HP StorageWorks Disk Array XP specific term, and HP Microsoft Exchange Server specific term a partMCU See MoM Media allocation During a restore session, a Media Agent locates data onRobotics control of a library Or off-site storage Symmetrix and HP StorageWorks Disk Array XP specific Term See also overwriteStorageWorks Disk Array XP specific Term MSM MmdbSee also CMMDB, CDB HP StorageWorks Disk Array XP specific term Mirror Unit See backup object See archived redo log See also zero downtime backup ZDB and online backupOnconfig Informix Server specific term An environment variable that See also archived redo log See also zero downtime backup ZDB, and offline backupOraclesid See also merging See also pre-exec Microsoft Exchange Server specific term The part See also post-execHP StorageWorks Disk Array XP specific term Standard HP HP StorageWorks Disk Array XP specific term The RAID RDF1/RDF2 RCURdbms EMC Symmetrix specific term a type of Srdf device group Rman HP StorageWorks Disk Array XP specific term The Remote Rman Oracle HP StorageWorks Disk Array XP VSS provider specific termRSM HP StorageWorks Disk Array XP specific term secondary See backup session,media management session, and restoreSession Microsoft VSS specific term a collection of shadow copies Microsoft VSS specific term a volume that represents aSibf Smbf SMBHP StorageWorks VA and HP StorageWorks EVA Specific term See also snapshot HP StorageWorks Disk Array XP Specific term Srdf See also ZDB to tape, ZDB to disk+tape, and replicaEMC Symmetrix specific term The EMC Symmetrix Remote EMC Symmetrix specific term The Data Protector software See failoverSyma Putting stress on the production servers or the network. a Any number of incremental backupsCheckpoints and the quorum resource recovery log, which Synthetic full ZDB specific term Disaster recovery specific term a system after a computerSee ZDB to disk See also source R1 device TNSNAMES.ORA Oracle and SAP R/3 specific term a network configurationSee also Microsoft Volume Shadow Copy Service VSS Data Protector specific term Keep track of IDB changes. See lights-out operation See also source volume and target volume See also Command View CV EVAMicrosoft SQL Server specific term This is a SQL Server See Microsoft Volume Shadow Copy Service Adic and STK specific term a VOLume SERial number is aVSS Replica, secondary volume S-VOL, and replica set rotation Configuration Informix Server specific term ON-Bar and Data Protector ZDB Recovery, ZDB to disk+tape, and replica Arrays, split mirror restore can also be usedSee also zero downtime backup ZDB, ZDB to disk, instant Recovery 402Glossary Index 404 Page Concepts Snapshot backup, 276 split mirror backup Hardware, 68, 70 software CRS 408 Supported configurations Selecting for restoreDirect Backup 324 410 Failover, 81, 82 FC-AL 412 See also libraries See IDB Internationalization, 340 IT managementSize 414 Media condition, 150 calculating, 150 fair Media pools, 135, 309, 325 default, 136 propertiesLoose, 147 strict Good 416 RDS SAN Restores, 125Data, 194 location Backup, 43 Sharing libraries, 47, 162, 163, 164 Sibf data Snmp RAID HP, 33 technical support 422