Post on 18-Jul-2015
Stephanie Balaouras
Senior Analyst
Forrester Research
TeleconferenceEnterprise Data Protection Strategies
February 14, 2006. Call in at 10:55 am Eastern Time
2Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Theme
A comprehensive and cost effective data protection
strategy includes disk and tape
3Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Agenda
• Data protection continuum
» Role of disk and tape
» Continuous data protection
» Snapshots
» Backup to disk/virtual tape libraries
• Integrated data protection strategies
» Data center
» Remote locations
• Data protection vendor profiles
• Recommendations
4Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Local data protection continuum
Stringency of
RPO/RTO
Cost
Continuous data protection
Snapshots
Backup to disk/virtual tape library
Backup to tape
5Entire contents © 2006 Forrester Research, Inc. All rights reserved.
The basics of disk and tape
Disk
• Random access
» No mechanical motion issues such as:
– Mount/dismount
– Rewind
– Load to ready
• Faster backup and recovery
• RAID protection
• Lower cost drive options
» ATA
» Low cost fibre channel/FATA
» $5-$15/GB
Tape
• Sequential access
• Widely deployed
» Tight integration with backup applications
» People, policies, procedures, and backup strategies already in place
» Significant customer investment
• Removable
» Offsite for disaster recovery or archiving
• Long archival life
• Interoperability of tape cartridges
• Lower cost
» $.75-$3.50/GB
6Entire contents © 2006 Forrester Research, Inc. All rights reserved.
The role of disk and tape
• Disk is used as an interim step before vaulting to tape
» Reduces backup window
• Tiered approach
» Disk is used for mission critical applications
» Tape is used for business critical and less critical applications
» Determined by recovery time requirements
• Tape for offsite disaster recovery and long term archiving related to regulatory compliance
Mission critical datarecovery
Business critical datarecovery
Long-term archival
Off-site for disaster recovery
Operational data recovery
Tape
Disk
7Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Continuous data protection (CDP)
• Continuously captures and tracks all data changes and can recreate virtualized snapshots at any point in time (PIT)
» Conflicting definitions out in the marketplace
• Provides:
» “Any PIT” recovery
• Key vendors
» Enterprise — Mendocino Software, Revivio
» Files only — Veritas BackupExec 10
• Considerations
» Introduces a new process into your backup strategy
» Typically requires as much as 1.5x your current capacity
Primarystorage
Secondarystorage
CDP appliance/server
Server
Control data
Data
Backup/copy data
8Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Snapshots
• Disk-based copies of the data at a point in time
» Full snapshots (2X capacity)
» Differentials snapshots (.2-.3X capacity)
• Provides
» Snapshot assisted backup
– Eliminates backup windows
– Applications are offline or in “hot backup mode” only as long as it takes to split the copy
» Instant restore
• Key vendors
» EMC TimeFinder/SnapView
» Network Appliance Snapshot
» Microsoft Virtual Shadow Copy Service
• Considerations
» May or may not require scripting with backup application
Primarystorage
Server
Backup media server
Backup
Tapestorage
9Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Snapshots
• Snapshot Instant Restore
» Schedule point-in-time snapshots throughout the day
» For example: every eight hours
» Provides instant restore from disk throughout the day
Primarystorage
Server
8 AM
Noon
4 PM
8 PM
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Backup to disk
• Backup application streams backup to any disk storage
• Significantly faster than traditional tape backup
» Backup 30%
» Restore 90%
• Majority of backup applications today support backup-to-disk
Server
Primarystorage
Backup media server
Secondarystorage
Tapestorage
11Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Backup to virtual tape library
• Backup application streams backup to virtual tape library (VTL)
• VTL emulates popular tape libraries, drives, slots, cartridges etc.
» Appears as physical tape library to backup applications
• Significantly faster than traditional tape backup
» Backup 30%
» Restore 90%
• De-stage to tape for off-site tape vaulting, long-term archiving
• Better utilization of tape resources
» Efficient tape grouping
Server
Primarystorage
Backup media server
Virtual tape
library
Tapestorage
12Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Backup to virtual tape library
• Virtual tape library vendors
» System vendors: HP, IBM, Sun (StorageTek)
» Storage vendors: EMC, Network Appliance
» Tape library vendors: ADIC, Quanum
» Standalone vendors: Diligent, NearTek, Sepaton
» ISVs: Falconstor
Server
Primarystorage
Backup media server
Virtual tape
library
Tapestorage
13Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Backup to disk versus virtual tape
Disk subsystems
• Traditional storage subsystem
» ATA drives for lower cost
» Still requires typical storage management tasks
• Backup applications must be upgraded, new disk options purchased
Virtual tape
• VTLs are purpose-built disk subsystems for backup and recovery
• Use tape emulation to integrate into existing backup applications, processes, and procedures
• Maximize existing investments in tape technology
14Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Protecting the data center and remote locations
• Data protection for branches and other small offices is capital intensive, labor intensive, and ineffective
» Costs
– Local backup servers and tape (libraries, autoloaders, cartridges)
– Local IT staff
» Quality and effectiveness
– Backups are not completed regularly or successfully
– Restoring data is even more troublesome
– Most sites still lack the ability to recover from a localized disaster
Headquarters
Regional office
Regional office Data
center
Branch/small office
Branch/small office
15Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Protecting the data center and remote locations
• Centralize management
» Central reporting
» Centrally manage both local and remote backup domains
• Consolidate backup
» Remote backup over the WAN to central location
» Hybrid: Backup locally to disk/VTL, vault to tape over the WAN to central location
» Replicate data from remote sites to central location, backup at the central location
• Outsource to a storage service provider
» Remote backup to disk and/or tape at provider’s facility on GB/month pricing
16Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Total ecosystem vendors must balance support for heterogeneity with better integration
• Vendors that offer the entire ecosystem (primary disk, secondary disk, VTL, backup application software)
» EMC
– EMC CLARiiON/DMX series (including array-based replication technologies)
– EMC CLARiiON Disk Library (VTL)
– EMC Centera
– Legato Replistor
– Legato Networker
» HP
– HP StorageWorks MSA/EVA/XP series (including array-based replication technologies)
– HP StorageWorks Virtual Library System
– HP Reference Information Storage Systems (RISS)
– HP StorageWorks Tape Libraries
– HP Storage Data Protector
17Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Total ecosystem vendors must balance support for heterogeneity with better integration
» IBM
– TotalStorage DS series
– (including array-based replication technologies)
– IBM TotalStorage Virtual Tape Server
– IBM System Storage DR550
– IBM TotalStorage Tape Libraries
– IBM Tivoli Storage Manager
18Entire contents © 2006 Forrester Research, Inc. All rights reserved.
ISVs must offer enough functionality to be seen as strategic vendors
• ISVs offer products and integrated suites to cover data protection and data management and are storage agnostic
» CA
– BrightStor ARCserve Backup
– BrightStor High Availability (replication solution for Windows 2000/2003)
» CommVault
– QuiNetix Suite (integrated backup, archiving, data migration, replication etc.)
» Symantec
– Veritas Storage Foundations
– Veritas Volume Replicator
– Veritas NetBackup
– Veritas BackupExec
19Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Partnering with the best of breed ISVs
• Vendors who offer primary disk, secondary disk, and VTL but partner with key ISVs for a total solution
» Network Appliance
– NetApp fabric-attached storage (FAS) systems
• (including array-based replication technologies)
– NetApp NearStore VTL
– NetApp NearStore
– Significant joint engineering with Veritas NetBackup
» Sun Microsystems
– StorEdge/StorageTek series for primary disk
• (including array-based replication technologies)
– StorageTek Virtual Storage Manager (VTL)
– StorageTek Tape Libraries
20Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Microsoft Systems Center Data Protection Manager
• Microsoft’s first backup to disk software application
» Supports backup to disk (but not to tape)
» Supports only Windows Server 2003 and Windows Storage Server 2003
» Supports only files (no application support currently)
» Need a secondary backup application for application support, vaulting to tape
• Advantages
» Low cost
» Familiar Windows interface
» Allows end-users to restore their own files
» Future releases will offer Exchange and SQLServer support.
21Entire contents © 2006 Forrester Research, Inc. All rights reserved.
Recommendations
• Incorporating disk in your data protection strategies will help you:
» Reduce backup windows
» Improve recovery time and recovery point objectives
• Tier your usage of disk and tape according to recovery time requirements and long-term archiving requirements
• Consider data protection strategies for your data center and remote locations together
» Centrally manage data protection solutions
» Leverage existing investments in existing data centers and DR sites to offer consolidated backup solutions
• Select the vendor who can offer the most integrated data protection and management functionality from a single integrated console