Stephanie Balaouras Senior Analyst Forrester Research

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


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


Local data protection continuum

Stringency of

RPO/RTO

Cost

Continuous data protection

Snapshots

Backup to disk/virtual tape library

Backup to tape


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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.


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


Stephanie Balaouras

+1 617/613-6440

[email protected]

www.forrester.com

Thank you

Stephanie Balaouras Senior Analyst Forrester Research

Technology

entire contents

data changes

backup applicationspeople

readyfaster backup

backup strategies

backup strategytypically

hot backup mode

diskvirtual tape librarybackup