the importance of disaster recovery for data protection

2005 Annual ConferenceOctober 24-26 2005, Newport, RI

2006 Summer ConferenceJune 13th, 2006

Sheraton Nashua Hotel , Nashua, NH

The Importance of Disaster Recovery for

Data Protection

Eric R SchottDirector, Product Management

2 © 2006 EQUALLOGIC, INC. │ ALL RIGHTS RESERVED

AgendaAgenda

SANs– Consolidation and improved operations

Data protection– How backup and recovery fits in

Best practices in data protection– Avoid data loss– Setup operations for fast recovery– Disaster protection


IT Best Practice: ConsolidationIT Best Practice: Consolidation

Consolidation = Improved operations– Simplified provisioning– Fewer points of management– Fewer physical locations– High availability– Advanced features for improved

operations

Data sharing across servers

Better backup and restore

Disaster protection

Testing & Rapid deployment

spare

spare

Logs

Stores DomainAD

spare

File Servers Backup Servers

Shares

Application Servers

spare

spare

Logs

Stores


The Promise of SANsThe Promise of SANs

Allows– Storage consolidation– Massively extended scalability– Greatly enhanced device connectivity

Enables– Server consolidation– Server clustering– LAN-free backup– Server-less backup– Disaster protection – Data replication

Provides– Easier management– Redundant storage configuration– Better application service levels

SAN

Backup Server


spare

spare

Logs

Stores DomainAD

spare

E-mailServer

Directory Server

Shares

Database Server

Domain Server

Consolidate Storage IntelligentlyConsolidate Storage Intelligently

eMail

Shares

SQLAD / Dom

Shares

Shares

Backups

Backups

Free Space

SwitchedGb Ethernet

Backup Servers

Application ServersFile Servers

PS Series® Array

eMail


iSCSI is a Better Network for SANsiSCSI is a Better Network for SANs

Bring Ethernet economics to storage– Enables low cost of ownership

Familiar network technology and management

– Reduces training & staff costs

Proven interoperable transport infrastructure

– Increase reliability

Multiple layers of security– CHAP, VPN, IPSEC, VLAN

Protects investment with simplified performance upgrades

– Transition from 1Gb to 10Gb Ethernet and beyond

Scalability over long distance– Enables remote data replication and disaster

recovery


Exchange Server

Backup Servers

Active Directory Server

SQL Server

Domain Server

Application/Web Servers

PS Series ArraysPS Series Arrays’’ Automatic ScalingAutomatic Scaling

eMail

Shares

SQL

AD / DomShares

Shares

Backups

Backups

File Servers

SwitchedGb Ethernet

Multiple storage systems join to automate performance and distribute work load

Manage as a single system, even as it grows

Free Space


Stackable Architecture

Fully-redundant hardware

Hot-swappable hardware

2GB battery backed memory

Three 1Gb network interfaces

300 MB/sec, 60,000 IOPS

Enclosure monitoring

20 minute setup

Auto-load balancing

Snapshots

Instant restore/cloning

Replication

On-line storage tiering

Multi-path/IO support

RAID 5 / RAID 10 / RAID 50

Automatic RAID placement

“Phone Home”

Complete SAN virtualization

Data ServicesSystem Design

StandardStandard Product FeaturesProduct Features

Enterprise-Design

All-included!


Data Protection GoalsData Protection Goals

Ensure your data is secure and accessible

Protection of data in use

Ability to recover data if it is lost


Why Do Disaster Recovery?Why Do Disaster Recovery?

Regulatory compliance

Insurance compliance

Build a better business

So you can sleep at night

Save the organization money


Business DriversBusiness Drivers

Regulatory compliance


Downtime CostsDowntime Costs

59% of Fortune 5000 companies experience a minimum of 1.6 hours of downtime per week.This includes software crashes, required system reboots, and normal maintenance.

-Dunn & Bradstreet

In one 2000 study, ONE out of FOUR organizations had a significant disruption in their computer systems.

- Arcus Data Security

33% = less than four hours18% = five to eight hours20% = nine to 24 hours24% = more than 24 hours

The cost of lost productivity can be calculated using the average salary+benefits figure of $36 / hour / person (not including lost revenue opportunities or damage to corporate credibility)

- IDC


Revenue is the Focus of DisastersRevenue is the Focus of Disasters……but more than revenue is a riskbut more than revenue is a risk

Indirect Costs

Stock Price

Reputation Market Share

Brand Equity

CustomerSatisfaction

Direct CostsLost Revenue

Lost Productivity

Criminal Liability


ComponentOutages

What Can Happen?What Can Happen?Threats to Availability of Data and SystemsThreats to Availability of Data and Systems

CPU fault

Disk failure

Array failure

Host bus adapter

Network card

Software

How to resolve?

Use redundancy techniques to increase reliability– Redundant hardware

DisksControllersHost connectionsFansPower

– Implement best practice operationsRAID protectionServer clusters


Reliability in StorageReliability in Storage

Disktechnology

RAIDwith autospares

RAID

Redundantcontrollers, cooling

EqualLogic Arrays

99.76%

Hot serviceall components

Stricttesting 99.79%

Averages based on reliability and service times

Data Availability

Disks TwoNines



Disktechnology

RAIDwith autospares

RAID


EqualLogic Arrays

99.76%

Stricttesting

99.99%

99.99%

99.79%

99.99%

Averages based on reliability and service times

Data Availability

Disks

RAID

RedundantHardware

TwoNines

FourNines



Disktechnology

RAIDwith autospares

RAID


EqualLogic Arrays

99.76%

Hot serviceall components

Stricttesting

99.99%

99.99%

> 99.999%

99.79%

99.99%

Data Availability

Disks

RAID

RedundantHardware

TwoNines

FourNines

FiveNinesHot Swap

© 2006 EQUALLOGIC, INC. │ ALL RIGHTS RESERVED

SANs Provide High AvailabilitySANs Provide High Availability

Multiple levels of redundancy throughout the data pathMultiple access paths allow failover capabilities– Multiple switched networks– MPIO– Multi-home servers– Multi-homed storage

De-coupling of storage from application service allows it to be managed independently


So Why Do I Need to do Backups?So Why Do I Need to do Backups?

I have reliable and redundant hardware…


ComponentOutages

LogicalOutages

SiteOutages

What Can Happen?What Can Happen?Threats to Availability of Data and SystemsThreats to Availability of Data and Systems

Software bug

Virus

Data corruption

Accidental delete

Dropped table

D.o.S. attack

CPU fault

Disk failure

Array failure

Host bus adapter

Network card

Software

Fire

Power outage

Terrorism/War

Flooding

Storms

Hurricane

“Hope for the best, plan for the worst”


Types of Disasters That Include Types of Disasters That Include Data LossData Loss

Data Destruction• Hardware failure• Software malfunction• Virus• Human error

Location Destruction• Natural disaster• Unnatural disaster


Backup Protects for All Types of Backup Protects for All Types of Data LossData Loss

BackupData Destruction• Hardware failure• Software malfunction• Virus• Human error



Backup Protects for All Types of Backup Protects for All Types of Data LossData Loss

BackupData Destruction• Hardware failure• Software malfunction• Virus• Human error


Recover all the dataRecover all or selected data


Determining Your Recovery NeedsDetermining Your Recovery Needs

• Amount of data loss acceptable

• The point to which data must be restored

RECOVERY POINT OBJECTIVE

• Amount of time it takes to come back online

• The time by which data must be restored

RECOVERY TIME OBJECTIVE

Days MinsHrsWks Secs

Recovery PointRecovery Point

Mins DaysHrsSecs Wks

Recovery TimeRecovery Time


Determine Your Disaster Determine Your Disaster Recovery NeedsRecovery Needs

hrs days wks mthssecs minsZero

“Downtime”secs

mins

hrs

days

wks

mths“Freshness”

RPO

RTO

What are my disaster recovery

needs?

I’m up and running in seconds, but I’ve lost a day’s data.

I lost no data but it took me a week to do it.


Cost of ProtectionCost of Protection

Recovery Point– What you do before the loss

How much data loss (work loss) can you endure?





$$$


Business Cost of Down Time Business Cost of Down Time

Recovery Time– What you do after the loss

How much downtime can you endure?





$$$


Solution Comparisons Solution Comparisons

•Replication

•Disk to Disk Backups

•Tape-only Backups





$$

$

What operating expense?


Seek BalanceSeek Balance

Don’t waste $10,000 protecting data worth $1,000

Don’t risk data worth $1,000,000 by protecting it with a $1000 Solution

Data Protection


Different Needs for Different Different Needs for Different Applications Applications

•Replication







$$

$

File and Print

HR Database

R&D Server

Web Server

ERP

eCommerce

email


Methods of Recovery: Methods of Recovery: Without Backups Without Backups ““Do It OverDo It Over””

Applications backonline with data

Disaster

Pre Disaster• Nothing

Post Disaster• Obtain “infrastructure”• Buy new systems• Re-install systems• Re-install applications• Build data from scratch

Week 1 Week 2 Week 3

down time

Work Loss Down time OpEx

Low

High

The Result:Actions Taken:Do It Over


Methods of Recovery: Methods of Recovery: With Backups Restore via TapeWith Backups Restore via Tape

Offsite Storage

Applications backonline with data

Disaster

down time

Week 1 Week 2 Week 3

Work Loss Down time OpEx

Low

High

The Result:

Week 2

Location #1

Pre Disaster• Make copies of data & store offsite

Post Disaster• Obtain “infrastructure”• Buy new systems• Re-install systems• Re-install applications• Restore data from tape

Actions Taken:Do It Over

Tape

Week 2

Week 2


At the Core of RestoreAt the Core of Restore……Backup Backup OperationsOperations

Backup provides– Copies of data– Transportable data– Catalog of copies

….….….



Backup provides– Copies of data– Transportable data– Catalog of copies– Methods for restoring data ….

….….



Backup provides– Copies of data– Transportable data– Catalog of copies– Methods for restoring data

– Historical record (multiple recovery points)History (archive) of corporate dataRegulatory complianceLegal record of business operations

Restore is only as successful as the backup operations done BEFORE the data loss

….….….


Only backup provides:– Cost-effective portability of data– Protection against complete data loss– Protection against viruses and data corruption– Managed multiple point-in-time copies of data– Integrated archival management– Integrated desktop/laptop protection

Backup does not provide– Instant access to data (short RTO)– Minimum data loss (short RPO)

Why Backup Still MattersWhy Backup Still MattersA Look at Key IssuesA Look at Key Issues


Catalog

LAN

Backup Approach: LocallyBackup Approach: Locally

Tape Drive

Server

Remote Location•Backup Data Movement


Improvement: Consolidate Backups Improvement: Consolidate Backups to Backup Serverto Backup Server

LAN

Server Server Server

BackupServer

SAN

Catalog

Application Volume

Tape Drive

•Backup Data Movement


SAN Backup & Recovery:SAN Backup & Recovery:Move from Traditional Backups to LAN FreeMove from Traditional Backups to LAN Free

LAN


BackupServer

iSCSI Tape

Library

SAN

Catalog

Application Servers Backup to SAN Tape Directly

Improve backup performance– All Servers can see the Tape Library

Application Volume

Remote Location

•Backup Data Movement


Backup to Tape Backup to Tape






Recovery Point – Typically daily

Recovery Time – Full restores are lengthy due to system disk recovery procedures; potential lengthy time to get all tapes to recovery location delays when restore procedure begins

Tape Backup(individualfile restore) (full restore)

Tape Restore

$$

$


Backup

Backup Alone Large Lost Work and Backup Alone Large Lost Work and Recovery TimeRecovery Time

Lost Work

Time to restoreservice

Minutes Hours Days

Seconds

Minutes

Hours

Day(s)


Challenges in Backup OperationsChallenges in Backup Operations

Ongoing operational burden– Shrinking Backup Windows– Staffing - Managing many backup “environments”– Time needed to run backup– Performance impact of backups on servers / network

Slow recovery time (Need to improve RTO)– Typically requires hours to days to resume operations due to restore operations– Data is in “backup” format

“Large” loss of work (Need to improve RPO)– Since last backup - may be 12 to 24 hours or more

Data continues to growEnsuring backup is “restorable”

– Must be run and tested regularly– How to backup running applications?– Operating system differences– Application differences


Improving Backup and Recovery Improving Backup and Recovery Requires DisksRequires Disks

Enabled by falling disk prices

Also enabled by mature, advanced software functionality

Leverages performance, reliability, and random access nature of RAID

Augments tape capabilities


VCR : TapeVCR : Tape


DVR : DiskDVR : Disk


Disk in Backups Disk in Backups –– BenefitsBenefits

Faster

Cheaper

And more importantly, better


Example 2 SAN Backup & Recovery:Example 2 SAN Backup & Recovery:Disk to Disk to Tape & Continuous BackupsDisk to Disk to Tape & Continuous Backups

LAN


BackupServer

iSCSI Tape

Library

SAN

Catalog

Application Volume

Step 1: Application Servers Backup to Disk

Improve backup performance •Backup Data Movement


Example 2 SAN Backup & Recovery:Example 2 SAN Backup & Recovery:Disk to Disk to Tape & Continuous BackupsDisk to Disk to Tape & Continuous Backups

LAN


BackupServer

iSCSI Tape

Library

Catalog

Step 2: Backup server copies disk backup to tape

SAN

Application Volume

Remote Location

Shift tape operations to first shift •Backup Data Movement


Recovery Point – Backup can be done frequently

Recovery Time – Full restore similar to tape, however, significant improvement for single files

Backup to Disk & Backup to Disk & Continuous BackupsContinuous Backups






$$

$

(individualfile restore) (full restore)

Disk Backup Disk Restore


Backup to Disk SolutionBackup to Disk Solution

Minimal benefit for full restores

Additional disk storage needed – has to be reliable and scalable

Reduces backup Windows– Disk supports simultaneous reads and

writes improving performance

Improves backup reliability – less exposure to lost data and improved staff productivity

Reduction in tape resources– Shift tape operations to normal hours– lower tape media costs

Fast file level restores – improved productivity and less downtime

Enterprise backup software support available

DrawbacksBenefits


Continuous Data ProtectionContinuous Data ProtectionFrequent Disk to Disk BackupsFrequent Disk to Disk Backups


Continuous Backup SolutionContinuous Backup Solution

May be disruptive to current backup policies and procedures

– Depending if existing product supports capability

May not support all applications in “continuous mode”

Improved recovery point capabilities –less data loss (RPO)

– Frequent incremental backups to disk –only sends changed blocks

Fast file level restores – improved productivity (RTO)

Enables consolidation of backup resources – lower cost

DrawbacksBenefits


Data Protection with SnapshotsData Protection with Snapshots

Provide instant copies of data without overhead

– Instant restore of disk images

– Offload backup operations to another server

– Give another server access to a copy of data safely

Snapshots are read / writeUp to 512 per volume– Maintain point-in-time

copies for longer recovery periods

Time

HardwareSnapshot

V

V

V


Quick Recovery with SnapshotsQuick Recovery with SnapshotsImage Restore ExampleImage Restore Example

Installing Software Patch?– Take a snapshot of system disk.– Install the software.– If there is a problem…

ShutdownRevert to the snapshot.Reboot

SystemDisk

SwitchedGb Ethernet

PS Series Array

DataVolume

DataVolume

/ or C:\

Server

SystemDisk

SystemDisk

SystemDisk

Instant recovery!


Backup

Lost WorkLost Work

Snapshots allow increasing frequency of data copies

Lost Work


Minutes Hours Days

Seconds

Minutes

Hours

Day(s)

Point in Time(Snapshot)


Backup

Reducing Lost WorkReducing Lost Work

Snapshots allow increasing frequency of data copies

Lost Work


Minutes Hours Days

Seconds

Minutes

Hours

Day(s)

Point in Time(Snapshot)

Better Backups with snapshots


Example 3 SAN Backup & Recovery:Example 3 SAN Backup & Recovery:ServerServer--less Backupsless Backups

BackupServer

LAN

Server Server Server Server

SAN

Step 1: Create a snapshot of the application volume



BackupServer

LAN


SAN

Step 1: Create a snapshot of the application volume

Snapshot



BackupServer

LAN


Remote Location

SAN

Step 2: Backup server copies the snapshot to tape

No server burden during backups

Snapshot


Disk Point in Time Backup Disk Point in Time Backup





$$

$


(individualfile restore)(full restore)

Disk Backup Disk Restore

Recovery Point – Can be done frequently reduced by taking snapshots

Recovery Time – Significantly reduced for full restore. File restores operate from disk

Point in time


ServerServer--less Copy Solutionless Copy Solution

Does not work easily on non-Windows platforms

Does not protect against complete site loss

Backup processing removed from production servers – less production impact improves TCO

Backup impact reduced to minutes

Commonly works with variety of applications

Fast full restores – improved productivity (RTO)

Works easily on Windows platforms

DrawbacksBenefits


Replicate Data to Remote LocationReplicate Data to Remote Location

Create distance between data copies

Accomplished by using network and storage technologies

Primary Data Replicas


Remote Data ReplicationRemote Data Replication

WAN

PRIMARY SITE

SECONDARY SITE


PS Series AutoPS Series Auto--ReplicationReplicationDelivers ease of use and affordable disaster protectionDelivers ease of use and affordable disaster protection

Location 1

Location 2

Time


Replication Replication

•Replication





$$

$

Recovery Point – Minimized for asynchronous replication, no lost data for synchronous replication

Recovery Time – Short because of on-line copy which can be used for single file restore or used as the active file system

Replication


Replication SolutionReplication Solution

Disruptive to current backup policies and procedures

Network is required between locations–Must meet performance and bandwidth needs

Integration effort may be required

More frequent backups with more copies kept online – improved RPO

Reduces tape media and automation resources – lower cost

Simplifies media management

Fast file & full restores

Replication based backup reduces IP network traffic

Shortest RPO & RTO when combined with snapshots

Improved consistency and reduced risk through centralization of remote backup

Good foundation for DR

DrawbacksBenefits


Disaster Recover Plan Considerations: Disaster Recover Plan Considerations: Weighing Time, Work Loss and CostsWeighing Time, Work Loss and Costs

How quickly does processing need to resume after a disaster?– How much revenue loss– How much productivity loss– What are requirements for responding to inquiries

How much “lost work” can be tolerated?– How valuable is completed work?

Which applications need what level of protection?– What is the business impact of failure / recovery procedure

How much will it cost if not prepared?– Likelihood of failure – How often will disaster(s) occur?

How much to invest for “just in case”?– Initial and ongoing operational costs of “being prepared”– Almost all applications need a common backup procedure


SummarySummary

Backup is the key line of defense in business continuity– Recovers from all types of data loss

Backup is improved by adding disk as part of the backup media– Enables dramatic improvements in both backup frequency and

recovery time– Snapshots improve regular backups by allowing for offload and

quick full-recovery.

Replication to a remote location provides fast recovery even in full data loss crisis– Provides distance for disaster recovery– Multiple recovery points– Restore from disk images


Notices & DisclaimersNotices & Disclaimers

Copyright © 2006 by EqualLogic, Inc.

No part of this document may be reproduced or transmitted in any form without the written permission from EqualLogic, Inc.

This document could include technical inaccuracies or typographical errors. EqualLogic may make improvements or changes in the product(s) or program(s) described herein at any time without notice. Any statements regarding EqualLogic’s future direction and intent are subject to change or withdrawal without notice, and represent goals and objectives only.References in this document to EqualLogic products, programs, or services does not imply that EqualLogic intends to make such products, programs or services available in all countries in which EqualLogic operates or does business. Any reference to an EqualLogic Program Product in this document in not intended to state or imply that only that program product may be used. Any functionality equivalent program, that does not infringe EqualLogic’s intellectual property rights, may be used.

The information provided in this document is distributed “AS IS” without any warranty, either expressed or implied. EqualLogic EXPRESSLY DISCLAIMS any warranties of merchantability, fitness for a particular purpose OR INFRINGEMENT. EqualLogic shall have no responsibility to update this information.

The provision of the information contained herein is not intended to, and does not, grant any right or license under any EqualLogic patents or copyrights.

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the importance of disaster recovery for data protection

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