Symantec NETBACKUP 7 Manuale Utente

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