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SymantecNetBackup™
DeduplicationGuide
Release7.0
20654102
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SymantecNetBackup™DeduplicationGuide The software described in this book is furnished under a license agreement and may be used only in accordance with the terms of the agreement. Documentation version 7.0 PN: 20654102 LegalNotice Copyright © 2009 Symantec Corporation. All rights reserved. Symantec, the Symantec Logo, Veritas, and NetBackup are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U.S. and other countries. Other names may be trademarks of their res
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Symantec Corporation 350 Ellis Street Mountain View, CA 94043 http://www.symantec.com
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TechnicalSupport Symantec Technical Support maintains support centers globally. Technical Support’s primary role is to respond to specific queries about product features and functionality. The Technical Support group also creates content for our online Knowledge Base. The Technical Support group works collaboratively with the other functional areas within Symantec to answer your questions in a timely fashion. For example, the Technical Support group works with Product Engineering and Symantec Se
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■ Version and patch level ■ Network topology ■ Router, gateway, and IP address information ■ Problem description: ■ Error messages and log files ■ Troubleshooting that was performed before contacting Symantec ■ Recent software configuration changes and network changes Licensingandregistration If your Symantec product requires registration or a license key, access our technical support Web page at the following URL: www.symantec.com/techsupp/ Customerservice Customer service information is availa
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Maintenanceagreementresources If you want to contact Symantec regarding an existing maintenance agreement, please contact the maintenance agreement administration team for your region as follows: Asia-Pacific and Japan customercare_apac@symantec.com Europe, Middle-East, and Africa semea@symantec.com North America and Latin America supportsolutions@symantec.com Additionalenterpriseservices Symantec offers a comprehensive set of services that allow you to maximize your investment in Symantec produ
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Contents TechnicalSupport ............................................................................................... 4 Chapter1 IntroducingNetBackupdeduplication ............................ 11 About NetBackup deduplication ...................................................... 11 About NetBackup deduplication options ..................................... 12 How deduplication works ........................................................ 14 Chapter2 Planning your deployment ................
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8 Contents Chapter3 Provisioningthestorage .................................................... 37 About provisioning the storage ....................................................... 37 About deduplication storage requirements ....................................... 37 About deduplication storage capacity .............................................. 38 About the deduplication storage paths ............................................. 38 Chapter4 Installing deduplication ...................
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Contents 9 Deleting a load balancing server configuration file ....................... 70 Removing a load balancing server ............................................. 70 Viewing deduplication storage servers ....................................... 72 Viewing deduplication storage server attributes .......................... 72 Resetting the deduplication registry .......................................... 73 Managing NetBackup Deduplication Engine credentials ...................... 74 Adding N
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10 Contents Volume state changes to DOWN when volume is unmounted ..................................................................... 96 Errors, delayed response, hangs ................................................ 97 Viewing disk errors and events ....................................................... 97 Deduplication event codes and messages .......................................... 97 Chapter8 Disaster recovery ............................................................... 103 Prepari
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1 Chapter IntroducingNetBackup deduplication This chapter includes the following topics: ■ About NetBackup deduplication AboutNetBackupdeduplication The proprietary Symantec PureDisk deduplication technology powers NetBackup integrated deduplication. Symantec packaged PureDisk into modular components. The components plug-in to NetBackup through the NetBackup OpenStorage framework. With these components, Symantec NetBackup provides the deduplication options that let you deduplicate data everywher
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12 IntroducingNetBackupdeduplication AboutNetBackupdeduplication AboutNetBackupdeduplicationoptions Deduplication everywhere lets you choose at which point in the backup process to perform deduplication. NetBackup can manage your deduplication wherever you implement it in the backup stream. Figure 1-1 shows the options for deduplication. Table 1-1 describes the options for deduplication. NetBackupdeduplication Figure1-1 Deduplicate on NetBackup clients Deduplicate on NetBackup media servers Dedu
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IntroducingNetBackupdeduplication 13 AboutNetBackupdeduplication NetBackupdeduplicationoptions Table1-1 Type Description NetBackup Client With NetBackup client-side deduplication, clients deduplicate Deduplication Option their backup data and then send it directly to the storage destination. A media server does not deduplicate the data. NetBackup Client Deduplication is a useful deduplication solution if a client host has unused CPU cycles or if the load balancing servers are overloaded. See “Ab
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14 IntroducingNetBackupdeduplication AboutNetBackupdeduplication NetBackupdeduplicationoptions (continued) Table1-1 Type Description PureDisk deduplication NetBackup PureDisk is a deduplication solution for bandwidth-optimized backups of data in remote offices. You can use PureDisk to reduce the amount of backup data that is stored in a datacenter by NetBackup. You use PureDisk interfaces to install, configure, and manage the PureDisk servers, storage pools, and client backups. You do not use Ne
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IntroducingNetBackupdeduplication 15 AboutNetBackupdeduplication 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. ■ The deduplication engine breaks file 2 into segments A, B, Q, D, and L. ■ The deduplication engine stores file segments A, B, C, D, and E from file 1 and file segments Q, and L from file 2. The deduplication engine does not store file segments A, B, and D from file 2. Instead, it p
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16 IntroducingNetBackupdeduplication AboutNetBackupdeduplication
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2 Chapter Planningyourdeployment This chapter includes the following topics: ■ Planning your deduplication deployment ■ About the deduplication storage type ■ About the NetBackup Media Server Deduplication Option ■ About NetBackup Client Deduplication ■ About NetBackup Deduplication Engine credentials ■ About the network interface for deduplication ■ About firewalls and the deduplication hosts ■ About scaling deduplication ■ About compression and encryption ■ About optimized duplication of dedup
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18 Planningyourdeployment Planningyourdeduplicationdeployment Deploymentoverview Table2-1 Deploymenttask Wheretofindtheinformation Determine the storage type See “About the deduplication storage type” on page 19. Determine which type of See“About the NetBackup Media Server Deduplication deduplication to use Option” on page 19. See “About NetBackup Client Deduplication” on page 24. Determine the requirements for See “About deduplication servers” on page 21. deduplication hosts See “About deduplic
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Planningyourdeployment 19 Aboutthededuplicationstoragetype Deploymentoverview (continued) Table2-1 Deploymenttask Wheretofindtheinformation Replace a PDDO host or migrate See “Replacing the PureDisk Deduplication Option from PDDO to NetBackup with Media Server Deduplication on the same host” deduplication on page 33. See“Migrating from PureDisk to the NetBackup Media Server Deduplication option” on page 34. Migrate from other storage to See “Migrating from another storage type to NetBackup dedup
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20 Planningyourdeployment AbouttheNetBackupMediaServerDeduplicationOption For a backup, the NetBackup client software creates the image of backed up files as for a normal backup. The client sends the backup image to the deduplication storage server, which deduplicates the data. The deduplication storage server writes the data to disk. See “About deduplication servers” on page 21. The NetBackup Media Server Deduplication Option is integrated into NetBackup. It uses the NetBackup administration in
