Symantec NetBackup™Deduplication GuideRelease 7.020654102
Volume state changes to DOWN when volume isunmounted ... 96Errors, delayed response,
Table 7-1Deduplication event codes and messages (continued)Message exampleNetBackupSeverityEventSeverityEvent #Service Symantec DeduplicationEngineabo
Table 7-1Deduplication event codes and messages (continued)Message exampleNetBackupSeverityEventSeverityEvent #The usage of one or more systemresource
TroubleshootingDeduplication event codes and messages102
Disaster recoveryThis chapter includes the following topics: Preparing for disaster Moving images off-site Recovering from a deduplication storage
Recovering from a deduplication storage server diskfailureIf recovery mechanisms do not protect the disk on which the NetBackup softwareresides, the d
Table 8-1Process to recover from media server disk failure (continued)If you have load balancing servers, delete the NetBackupDeduplication Engine cre
Warning: The new host must use the same byte order as the old host. If it doesnot, you cannot access the deduplicated data.(In computing, endianness d
Table 8-2Process to recover from a permanent media server failure(continued)ProcedureTaskConfigure the storage server by uploading the configurationfr
Disaster recoveryRecovering the storage server after NetBackup catalog recovery108
Deduplication architectureThis chapter includes the following topics: Deduplication server components Media server deduplication process Deduplicat
Introducing NetBackupdeduplicationThis chapter includes the following topics: About NetBackup deduplicationAbout NetBackup deduplicationThe proprieta
Figure 9-1Storage server deduplication componentsPureDiskplug-inNetBackupDeduplicationEngineCatalog metadata pathData pathNetBackupDeduplicationManage
Table 9-1NetBackup deduplication components (continued)DescriptionComponentThe deduplication manager is one of the storage server corecomponents. The
Figure 9-2Deduplication to a media server deduplication poolnbjmbpbrmbptmDeduplication storage serverMaster serverClient APureDiskplug-inNetBackupDedu
The PureDisk plug-in sends only unique data segments to the NetBackupDeduplication Engine on the storage server. The NetBackup DeduplicationEngine w
Deduplication client componentsTable 9-2 describes the client deduplication components.Table 9-2Client deduplication componentsDescriptionHostComponen
Figure 9-4Deduplication client backup to a media server deduplication poolnbjmbpbrmbptmProxyplug-inDeduplication storage serverMaster serverDeduplicat
The PureDisk plug-in performs file fingerprinting calculations. The PureDisk plug-in sends only unique data segments to the storage server,which wr
The client nbostpxy process moves the data to the PureDisk plug-in. The PureDisk plug-in retrieves a list of fingerprints from the last full backup
The PureDisk plug-in reads the backup image and separates the image intofiles. The PureDisk plug-in separates files into segments and calculates th
Aabout NetBackup deduplication 11about NetBackup deduplication options 12appliance deduplication 13Bbackupclient deduplication process 114big endian 1
About NetBackup deduplication optionsDeduplication everywhere lets you choose at which point in the backup processto perform deduplication. NetBackup
deduplication hostsand firewalls 27client requirements 25load balancing server 22server requirements 23storage server 22deduplication logsclient dedup
Ggarbage collectionfor deduplication 91Hhost requirements 23how deduplication works 14Iimages on disk report 82initial seeding 32Llicense information
PureDisk Deduplication Optionreplacing with media server deduplication 33PureDisk plug-inabout 110log file 85purediskdbuser account 111Rreconfiguring
Table 1-1NetBackup deduplication optionsDescriptionTypeWith NetBackup client-side deduplication, clients deduplicatetheir backup data and then send it
Table 1-1NetBackup deduplication options (continued)DescriptionTypeNetBackup PureDisk is a deduplication solution forbandwidth-optimized backups of da
The following list describes how NetBackup derives unique segments to store: The deduplication engine breaks file 1 into segments A, B, C, D, and E.
Introducing NetBackup deduplicationAbout NetBackup deduplication16
Planning your deploymentThis chapter includes the following topics: Planning your deduplication deployment About the deduplication storage type Abo
Table 2-1Deployment overviewWhere to find the informationDeployment taskSee “About the deduplication storage type”on page 19.Determine the storage typ
Table 2-1Deployment overview (continued)Where to find the informationDeployment taskSee “Replacing the PureDisk Deduplication Optionwith Media Server
Symantec NetBackup™ Deduplication GuideThe software described in this book is furnished under a license agreement and may be usedonly in accordance wi
For a backup, the NetBackup client software creates the image of backed up filesas for a normal backup. The client sends the backup image to the dedup
Figure 2-1NetBackup media server deduplicationPureDiskPlug-inPureDiskPlug-inNetBackupclientNetBackupDeduplicationEnginePureDiskPlug-inNetBackupclientN
Table 2-2NetBackup deduplication serversDescriptionHostOne host functions as the storage server for a deduplication node;that host must be a NetBackup
About deduplication server requirementsAll hosts that are used for deduplication must be NetBackup 7.0 or later. Hostsinclude the master server, the m
the installation fails. To upgrade a NetBackup media server that hosts a PDDOagent, you must first remove the PDDO agent.See the NetBackup PureDisk De
Figure 2-2NetBackup client deduplicationPureDiskPlug-inNetBackupdeduplicationclientNetBackupPureDiskDeduplicationEnginePureDiskPlug-inPureDiskdeduplic
About client deduplication limitationsClient deduplication does not support multiple copies per job. For the jobs thatspecify multiple copies, the bac
About the network interface for deduplicationIf the server host has more than one network interface, by default the hostoperating system determines wh
For the initial full backups of your clients, use the deduplication storage server.For subsequent backups, use load balancing servers.Do not expect
Figure 2-3Optimized duplication copy exampleHost APureDiskPlug-inNetBackupDeduplicationEnginePureDiskPlug-inDeduplication node A (source)Deduplication
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If the destination is a PureDisk Deduplication Pool: Configure a mediaserver that accesses the PureDisk Storage Pool Authority host as a loadbalanci
If you use your destination storage unit to back up clients, you can create adifferent storage unit for those jobs. In that storage unit, select all o
About deduplication performanceMany factors affect performance, especially the server hardware and the networkcapacity.Table 2-4 provides information
Table 2-4Deduplication job load performance for a deduplication storageserver (continued)DescriptionWhenClean up is when the NetBackup Deduplication E
Table 2-5Replacing a PDDO host with a media server deduplication hostProcedureTaskDeactivate all backup policies that use the host.See the NetBackup A
Table 2-6To migrate from PureDisk to NetBackup deduplicationProcedureTaskSee the NetBackup Installation Guide for UNIX and Linux.See the NetBackup Ins
Table 2-7Migrating to NetBackup deduplication (continued)ProcedureTaskRedirect your backup jobs to the media server deduplicationpool storage unit. To
Provisioning the storageThis chapter includes the following topics: About provisioning the storage About deduplication storage requirements About d
NetBackup requires exclusive use of the disk resources. If the storage is used forpurposes other than backups, NetBackup cannot manage disk pool capac
The path names must use ASCII characters only.The NetBackup Media Server Deduplication Option does not support NFS mountedfile systems.Caution: You ca
Technical SupportSymantec Technical Support maintains support centers globally. TechnicalSupport’s primary role is to respond to specific queries abou
Provisioning the storageAbout the deduplication storage paths40
Installing deduplicationThis chapter includes the following topics: About installing deduplication About the deduplication license key Licensing Ne
About the deduplication license keyNetBackup deduplication is licensed separately from base NetBackup.The NetBackup Deduplication Option license key e
For the new host, you must use the same host name. The new host cannot host adeduplication storage server already.Reasons to replace the host include
Table 4-1How to replace the deduplication storage server host (continued)ProcedureTaskIf you did not save a storage server configuration file beforeth
NetBackup media server deduplication components and the deduplication storage.The host remains a NetBackup media server.This process assumes that all
Table 4-2Disable media server deduplication (continued)On UNIX and Linux systems, remove the following files: etc/pdregistry.cfg opt/pdag opt/pdsha
Configuring deduplicationThis chapter includes the following topics: Configuring deduplication Configuring a deduplication storage server About ded
See the NetBackup Administrator's Guide for Windows, Volume I.See the NetBackup Administrator's Guide for UNIX and Linux, Volume I.Table 5-1
The type of storage server.For NetBackup media server deduplication, select Media Server DeduplicationPool for the type of disk storage.For a PureDi
Version and patch level Network topology Router, gateway, and IP address information Problem description: Error messages and log files Troubles
Configuring a deduplication poolWhen you create a deduplication storage server, you can launch the Disk PoolConfiguration Wizard after NetBackup creat
Table 5-2Media server deduplication pool properties (continued)DescriptionPropertyFor a media server deduplication pool, all disk storage is exposedas
Table 5-2Media server deduplication pool properties (continued)DescriptionPropertySelect to limit the number of read and write streams (that is, jobs)
Deduplication storage unit propertiesThe following are the configuration options for a PureDisk disk pool storage unit.Table 5-3Deduplication storage
Table 5-3Deduplication storage unit properties (continued)DescriptionPropertyThe Maximum concurrentjobs setting specifies the maximum numberof jobs th
For example, assume that you have 100 important clients, 500 regular clients,and four media servers. You can use two media servers to back up your mos
Enabling client deduplicationTo enable Client Deduplication, set an attribute in the NetBackup master serverClient Attributes host properties.To speci
NetBackup deduplicates the client data that it sends to a deduplication storageunit.Configuring optimized deduplication copyYou can configure optimize
Optimized duplication failover. By default, if an optimized duplication job fails,NetBackup does not run the job again. Number of optimized duplica
To add a load balancing server1In the NetBackup Administration Console, expand Media and DeviceManagement > Credentials > Storage Server2Select
Maintenance agreement resourcesIf you want to contact Symantec regarding an existing maintenance agreement,please contact the maintenance agreement ad
About the deduplication configuration fileOn each host that deduplicates data, a pd.conf file contains configuration settingsfor the deduplication. Yo
4Save and close the file.5Restart the NetBackup Remote Manager and Monitor Service (nbrmms) on thehost.pd.conf file settingsTable 5-4 describes the de
Table 5-4pd.conf file values (continued)ActionPossible valuesDefault valueSettingThis keyword is reserved for internal use.Note: Do not change this se
Table 5-4pd.conf file values (continued)ActionPossible valuesDefault valueSettingDetermines if the data to replicate is encryptedbefore it is sent out
Warning: Deleting valid backup images may cause data loss.Table 5-5Disable media server deduplicationProcedureTaskDeactivate all backup policies that
Managing deduplicationThis chapter includes the following topics: Managing deduplication servers Managing NetBackup Deduplication Engine credentials
See “Viewing deduplication storage servers” on page 72.See “Viewing deduplication storage server attributes” on page 72.See “Resetting the deduplicati
6Change the value.7Click OK.Deleting a deduplication storage serverIf you delete a deduplication storage server, NetBackup disables the deduplicationf
To determine deduplication storage server state◆Run the following command on the NetBackup master server or adeduplication storage server:UNIX: /usr/o
To edit the storage server configuration1If you did not save a storage server configuration file, get a storage serverconfiguration file.See “Getting
Technical Support ... 4Chapter 1 Introducing NetBackup ded
Setting the storage server configurationYou can set the storage server configuration (that is, configure the storage server)by importing the configura
After you remove the load balancing server, restart the NetBackup EnterpriseMedia Manager service. The NetBackup disk polling service may try to use t
4In the Change Storage Server dialog box, select the Media Servers tab(Windows) or the Login Credentials tab (UNIX).5Clear the check box of the media
To view deduplication storage server attributes◆Run the following command on the NetBackup master server or adeduplication storage server:UNIX: /usr/o
To reset the deduplication registry file on UNIX and Linux◆Enter the following command on the storage server to reset the deduplicationregistry file:c
Add the same credentials that you already use in your environment.Another procedure exists to add a load balancing server to your configuration.See “A
Determining which media servers have deduplication credentialsYou can determine which media servers have credentials configured for theNetBackup Dedup
3On the Edit menu, select Change.4In the Change Disk Pool dialog box, change properties.See “Media server deduplication pool properties” on page 50.Ch
To change the state to DOWN, the disk pool in which the volume resides must notbe busy. If backup jobs are assigned to the disk pool, the state change
To determine disk pool state1In the NetBackup Administration Console, expand Media and DeviceManagement > Device Monitor.2Select the Disk Pools tab
Chapter 3 Provisioning the storage ... 37About provisioning the storage ...
To view disk pools◆In the NetBackup Administration Console, expand Media and DeviceManagement > Devices > Disk Pools.Monitoring deduplication ac
applicable) to a load balancing server for deduplication. Typically,deduplication rates for that information are zero or very low. The followingjob de
Table 6-1Disk reportsDescriptionReportThe Images on Disk report generates the image list present on thedisk storage units that are connected to the me
Monitoring deduplication processesThe following are the deduplication processes about which NetBackup reports: NetBackup Deduplication Engine in the
A log file for each connection to the engine is stored in a directory structure.The following describes the pathname to a log file for a connection:
3Save the file.4Run the following command:install_path\Veritas\pdde\pddb\bin\pg_ctl reload -Ddbpath\databases\pddb\dataIf the command output does not
Windows: install_path\Veritas\NetBackup\logs\nbostpxy.About VxUL logsSome NetBackup commands or processes write messages to their own log files.Other
To view and manage VxUL log files, you must use NetBackup log commands. Forinformation about how to use and manage logs on NetBackup servers, see theN
Table 6-3Capacity and usage reporting (continued)DescriptionOptionThe Storage Server window of the NetBackup AdministrationConsole displays real-time
About deduplication container filesThe deduplication storage implementation allocates container files to hold backupdata. Deleted segments can leave f
Deleting a load balancing server configuration file ... 70Removing a load balancing server ...
Deleting backup imagesImage deletion may be time consuming. Therefore, if you delete images manually,Symantec recommends the following approach.See “D
NetBackup Deduplication Engine queue processing.Operations that require database updates accumulate in a transaction queue.Twice a day, the NetBacku
Managing deduplicationAbout maintenance processing92
TroubleshootingThis chapter includes the following topics: Troubleshooting installation issues Troubleshooting configuration issues Troubleshooting
PDDE_packages/suse/NB_FID2740_LinuxS_x86_20090713_6.6.0.27209/linuxS_x86/catalog/anb/NB.file_trans failed. Aborting ...Verify that your system is at p
To prohibit reverse host name lookup by using the bpsetconfig command◆Enter the following command on each media server that you use fordeduplication:e
Backup jobs failIf backup jobs fail with an Error 800: Disk Volume is Down message, examinethe disk error logs to determine why the volume was marked
To change the volume state to UP◆Mount the file systemAfter a brief period of time, the volume state changes to UP. No further actionis required.Error
Table 7-1Deduplication event codes and messagesMessage exampleNetBackupSeverityEventSeverityEvent #Operation configload/reload failed onserver PureDis
Table 7-1Deduplication event codes and messages (continued)Message exampleNetBackupSeverityEventSeverityEvent #A request for agent task was denied ons
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