MSG389

Achieving High Availability with Windows Server and Exchange Server

Anthony Quigney, Application Solution Centre Manager, Dell EMEA

Brian Hayden,Senior Systems Consultant, Application Solution Centre, Dell EMEA

Agenda

Availability – Why is it important?

Availability – Defined

Availability - Business / IT Challenges

Availability SolutionsWindows Server 2003

Exchange Server 2003

Clustering

Dell High Availability Solutions

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Today, computing resources are the axis on which business revolves. When these resources are unavailable to an organization, it is at risk of losing its competitive edge.

data

Lost Systems . . .

Revenue

Customers

Decision Capability

Data

Productivity

Leads to lost . . .

Effects Of Downtime

The Cost of Downtime

Source: IT Performance Engineering & Measurement Strategies: Quantifying Performance Loss, Meta Group, October 2000

Industry SectorRevenue Per

HourRevenue Per

Employee-Hour

Energy $2,817,846 $569.20Telecommunications $2,066,245 $186.98Manufacturing $1,610,654 $134.24Financial institutions $1,495,134 $1,079.89Insurance $1,202,444 $370.92Retail $1,107,274 $244.37Pharmaceuticals $1,082,252 $167.53Banking $996,802 $130.52Food/beverage processing $804,192 $153.10Consumer products $785,719 $127.98Transportation $668,586 $107.78Utilities $643,250 $380.94Health care $636,030 $142.58Professional services $532,510 $99.59Construction and engineering $389,601 $216.18Media $340,432 $119.74Hospitality and travel $330,654 $38.62Average $1,010,536 $205.55

Four Levels of Continuity High Availability: Maintaining the availability of systems critical to ongoing

operations during a failure or service outage

Disaster Recovery: Recovering from unplanned, catastrophic events or disasters in a predetermined manner based on the importance of the system

High Availability System Features Hot- swappable, redundant components with Mission-critical support

Rapid Equipment Replacement Vendor services and financing programs

SiteBeyond the Building

Increasing cost, functionality and complexity

ApplicationSystem Interaction

Redundant Systems Continuous server, storage, network access

Application Failover/ Load Balancing Continuous application access via clustering

SAN, NAS & DAS Continuous data access

Backup and Restore Real-time tape backup, Off-site storage

Site/Datacenter Failover Re-route users and data to replicated sites

Site Recovery Remote or commercial recovery facilities

PlatformIn the Box

DataBeyond the Box

When a failure occurs, it makes an impact. Avoiding downtime results from properly planning, designing and implementing

multiple levels of protection.

The Causes of Downtime

Causes of Failure Examples Impacts…

Driver hangs, OS hangs/reboots, virus, file corruption

Software defects/failures

Platform, data, applications

Upgrade components, firmware, drivers, O/S, software

Planned administrative downtime

Platform, data, applications

Accidental or intentional file deletion, unskilled operation, experimentation

Operator error andmalicious users

Platform, data, applications

Software/systems requiring reboot, system board failure

System outage/maintenance

Applications

Fire, storms, collapse, explosion, and other localized disasters

Building/site disaster Site

Earthquake, hurricanes, floods, other regional natural catastrophes

Metropolitan disaster Site

Bad memory chip, fan, power, HDD, data path, controller

Component failure Platform, data

AvailabilityTo measure availability, we need to know

How often a failure is expected, or the Mean Time to Failure (MTTF)What is the time it takes to recover from a failure, or the Mean Time to Recover

The calculation for availability is 

To achieve high availabilityMTTF must be as high as possible MTTR must be as low as possible

In addition, you must consider business impact when calculating availability

Availability = MTTF

MTTF + MTTR

Levels of Availability

What businesses are saying

“having my email work is more important to me than having a dial tone” – Fortune 50 CIO

“In the next 24 hours, 8 million e-mail messages will be exchanged among employees in the Boeing network”1

11 http://www.boeing.com/companyoffices/aboutus/quickfacts.htmlhttp://www.boeing.com/companyoffices/aboutus/quickfacts.html

Email is business critical What analysts are saying

Email is mission critical and must be efficient: in 2003 businesses will send 3.5 Trillion emails --over 13 Billion emails/day

Gartner predicts that the volume of daily emails sent worldwide will reach 36 billion by 2005 – more than three times the number of emails sent in 20011

1 Gartner Dataquest Perspective, Market Analysis, “From Content to Knowledge: The Growing Gap, March 4, 20031 Gartner Dataquest Perspective, Market Analysis, “From Content to Knowledge: The Growing Gap, March 4, 2003..

Top Concerns of Today’s Messaging Environment

ReliabilityQuick RecoverySecurity PrivacyBusiness Integrity

Windows Server 2003 Exchange Server 2003

Advanced Features

New Features of Windows Server 2003

8 node failover clusters

Shutdown tracker (log reasons for shutdown, restart)

Diskpart – grow basic volumes

Volume Shadow Copy

Mount points (in Cluster)

/USERVA = 3030 (boot.ini switch)

Improved AD performance

Better Memory Management

New Features of Exchange Server 2003

Improved OWA (more like Outlook)

Improved Virus Scanning API (VSAPI)

Exchange Management Pack for MOM included

New Migration tools

Increased Network PerformanceDecreased network & processing costs

Replication

IPSec support between front-end and back-end clusters

With Exchange Server 2003 on Windows Server 2003…

Enable Server and Site ConsolidationImprove Management and Administration Enhance User Experience and Information ManagementImprove Client and Server Communications (sync)Increase the User productivity

Compatible operating systems

Supported Active Directory environments

Exchange version

Windows 2000 Server SP3+

Windows Server 2003

Windows 2000 Server SP3+

Windows Server 2003

Exchange2003

Yes Yes Yes Yes

Exchange2000 + SP3

Yes No Yes Yes

Exchange 2000 + SP2

Yes No Yes Yes

Exchange 5.5 + SP3

Yes No Not required Not required

AD & OS Compatibility Matrix

Exchange Server 2003

Clustering

High Availability Cluster: Goals

Availability Data, application, service

Scalability CPU, storage, # nodes

Application Recovery failover, restart

Manageability Single Point of Administration

Eliminate Single Point of FailureRedundancy throughout

MSCS: Virtual Servers

Virtual Server #1Name: CLUSTERIPIP: 192.168.1.11

App: Quorum

Virtual Server #2Name: EXG1

IP: 192.168.1.12App: Exchange

Virtual Server #XName: EXG2

IP: 192.168.1.13App: Exchange

Clients connect to Virtual Servers (VS). If a cluster node running a VS fails, the other server will run the VS

Cluster Node AName: CLUSTER_A

IP: 192.168.1.1APP: MSCS

Cluster Node BName: CLUSTER_B

IP: 192.168.1.2APP: MSCS

Clients do not connect to physical nodes. Admins connect for administration

MSCS

Virtual Servers typically include the following resources: a disk, IP address, network name, and application service(s)

                                                                

EXG2EXG1Quorum

ClientClient ClientClient

Cluster Services – Active N+I

Active (N) + Passive (I) combinations

Clusters of smaller servers will continue to overtake larger proprietary systems

Less $$ for hardware

Scale better

Faster Failover

Exchange Server 2003 Clusters

Server Version Active (N+I) ActiveN

Windows 2K AS 2 node 2 node

Windows 2K DC 3+1 node 3 nodes

Windows 2K3 EE 7+1 node 7 nodes

Windows 2K3 DC 7+1 node 7 nodes

Exchange 2003 Installation on MSCS

Easier to create cluster or add nodes using Cluster Administrator in Windows Server 2003

Microsoft Exchange Server 2003 automatically detects presence of MSCS cluster and installs necessary components.

Microsoft® Exchange Failover

Cluster Node Fails

Failure Detected by Cluster Heartbeat

Surviving Node acquires Disk Reservations

Check and mount the file systems

Restart Exchange Resources

Virtual Server

Restore Communications

Client side retry

Exchange 2000 Dependency Tree

System AttendantSystem Attendant

Exchange StoreExchange Store

SMTPSMTP HTTPHTTP IMAP4IMAP4 POP3POP3 MSSearchMSSearch

Message Message Transfer Transfer

AgentAgentRoutingRouting

Network Network NameName

Physical Physical DiskDisk

IP IP AddressAddress

Exchange 2003 Dependency Tree

Flattened dependency hierarchy of Exchange services

Faster recovery times after failover

System AttendantSystem Attendant

SMTPSMTP HTTPHTTP IMAP4IMAP4 Exchange Exchange StoreStore

MSSearchMSSearch

Message Message Transfer Transfer

AgentAgentRoutingRouting

Network Network NameName

Physical Physical DiskDisk

IP IP AddressAddress

Dell | EMC Storage

Advanced Features

Typical Storage Environment

LAN

Exchange 2000 SQL Server2000 File & Print Other

What are the IT challenges with this environment ?

DLT7000 Tape

Library

40GB 40GB 15GB 15GB

80GB 45GB 80GB 60GB

DDS-4

Consolidated Storage Environment

LAN

Consolidating Storage

Tape Library

Exchange 2000 SQL Server2000 File & Print Other

High Availability Level

Application

Operating System

HOST BUS ADAPTER

STORAGE CONTROLLER

RAID LEVEL

DISK PORT

Server

Storage = Achilles’ HeelStorage = Achilles’ Heel

Consolidated Storage Environment

LAN

Consolidating Storage

Tape Library

Exchange 2000 SQL Server2000 File & Print Other

RedundantStorage Area Network

(SAN)

RedundantStorage Area Network

(SAN)

Redundant Storage System

Multi-Path IO with failover (PowerPath)

Redundant Storage Processors (RAID controllers)

Protected write cacheMirroring

SPS

Vaulting

RAID 1, 3, 5, 1+0

Dual Fibre Channel loops on storage system back-end

PowerPathLoad balance I/O across multiple paths to the same RAID controller

I/O Path failover for redundant paths

I/O’s are divided I/O’s are divided across both paths to across both paths to

SPBSPB

SnapView - Snapshot

SnapView creates logical point-in-time views of production information

Takes only seconds to create a complete snapshotCopy on first write

Snapshot allows access for test, backup, etc., without compromising the production data

Production Data

Production Host

100 GB

Snap

Snapshot

10 GB

SnapView - Clone

SnapClone creates full point in time copy of another Volume

Backup Server or Testing Host

Production Data

Production Host

100 GB

Snap

Snap Clone

100 GB

Snapshots & SnapClone

Array based product – no burden on hostRead / write mountable by a secondary host for increased productivityMinimizes time that production data is unavailable to usersCan eliminate scheduled downtime for backupRequires less disk space than a full mirror

MirrorView

Maintains synchronous remote mirroring between two Dell | EMC arrays

Transparent to server, operating system, and applications

Protects from unavailability and data lossPrimary and secondary site can be remote storage for each otherFailover production environment to remote site

Dell | Quantum

Storage

Backup

Data Protection: Value Tradeoffs with Different Solutions

Mirroring

Replication

Snapshots

Backup

Archiving

PrimaryDisk

SecondaryDisk

Tape

RestoreTime

Long

Short

Avail-ability

Low

High

Safety

High

Low

TimeRetained

Long

Short

Multi-Vendor

Many

One

Prioritizing Data Based on Value

ValueLow

High

Business can operate with limited data availability; significant disruption if data is lost

Ava

ilab

ilit

y

Imp

act

of

Dat

a L

oss

Lifeblood

Essential

Important

Lower priorityBusiness can operate with minimal data availability; some disruption if data is lost

Business slowed if data is unavailable; stopped if data is lost

Business stops if data isunavailable or lost

Aligning Data Protection Needs with Technologies

Tape Autoloader

General PurposeNAS

Synchronous Mirrored RAID

Snapshots

Asynchronous Mirrored or Replicated

RAID

Disk-BasedBackup

Local Tape Backup and Remote

Tape Archive

Local/Remote Tape Archive

Important

Non-essential

Essential

Lifeblood

ValueLow

High

Ava

ilab

ilit

y

Imp

act

of

Dat

a L

oss

Disk and Tape: Both Have a Role to Play

0 101

0 10 101010 1 00 0000 0 11 1 10 000 1 10 1 00 0000 0 11 1 10 000 1 10 1 00 0000 0 11 1 10 000 1 1

0 1 00 0000 0 11 1 10 000 1 10 1 00 0000 0 11 1 10 000 1 10 1 00 0000 0 11 1 10 000 1 1

Backup Server withBackup Software

PV 136TTape Library

Disk-based hardware optimized for data protection

and Dell Solutions: Meeting the Challenge Together

Lifeblood

Lower priority

Essential

Important

DLTtape &Super DLTtape

Media

Dell DLT/SDLT Drives

SDLT in Large Automation

DLT/SDLT Midrange

Automation Libraries

Power Vault DLT autoloaders

With Compatibility

Exchange DR Demo On View at Dell Stand

MirrorView

OS Boot Disk

Exchange Logs

Exchange Store

CX600 FC4700

Production Site Disaster Recovery Site

Exchange Logs Mirror

Exchange Store Mirror

OS Boot Disk mirror

Domain Controller

Exchange 2000

Domain Controller

Exchange 2000

StorageGroups

Fibre Switch

SITE

FAILURE!Fibre Switch

Promote Remote MirrorsUpdate Storage GroupsBoot Remote DR Server

Dell EMC Nortel BT Business Continuity Solution

Dell Application Solution Centre

EMC Solutions Operation Centre

Fibre Connectivity

Exchange High Availability Solution

A

CX600-ANortel Optera

ESAT BTDWDM

ManagedService

Nortel Optera

Port 3(MirrorView)

Exchange DataVolumes

BHost bootvolumes C D

MirrorView

100 Miles

Extended VLAN

CX600-B

Existing SAN

Host AClustered

Host BClustered

Mgt Host

Port 3

Existing SAN

Domain Controller Domain Controller

Host CClustered

Host DClustered

Mgt Host

Dell Limerick EMC CorkDELL/EMC/Nortel/ESAT BT DWDM Installation

More Information

Dell HA Clustering websitewww.dell.com/clusters

Dell Solutions websitewww.dell.com/solutions

Dell Power Solutions Magazine (online)www.dell.com/powersolutions

Dell ROI Online Calculatorswww.dell.com/roi

Ask The ExpertsGet Your Questions Answered

Ask the Experts area Wednesday 9-11

Dell Stand (All Week)

Thank You

Community Resources

Community Resourceshttp://www.microsoft.com/communities/default.mspx

Most Valuable Professional (MVP)http://www.mvp.support.microsoft.com/

NewsgroupsConverse online with Microsoft Newsgroups, including Worldwidehttp://www.microsoft.com/communities/newsgroups/default.mspx

User GroupsMeet and learn with your peershttp://www.microsoft.com/communities/usergroups/default.mspx

evaluationsevaluations

© 2003 Microsoft Corporation. All rights reserved.© 2003 Microsoft Corporation. All rights reserved.This presentation is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, IN THIS SUMMARY.This presentation is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, IN THIS SUMMARY.

Backup Slides

SAN CopyNo host CPU cycles involvedCan copy to/from

CLARiiON (Dell | EMC)Symmetrix

UsageUpgrade - one time migration to another storage systemTest – routine copy to secondary storage for testContent Distribution – copy to multiple targets

Source can be snapshot, clone, fractured mirrorCopy data from LUN to LUNTarget LUN must be > or = source LUN

Primary Causes of Data Loss

Source: Quantum analysis

HumanError38%

Theft/Sabotage

7%

SoftwareFailure

5%

Hardware Failure20%

Power Failure/ Surges

12%

Viruses10%

NaturalDisasters

4%

Other3%

A data protection solution should protect you against all causes of data loss

Source: Quantum analysis

HumanError38%

Theft/Sabotage

7%

SoftwareFailure

5%

HardwareFailure

20%

Power Failure/Surges

12%

Viruses10%

NaturalDisasters

4%

Other3%

• Purely disk-based backup systems do not offer adequate protection against human error, viruses, hackers or natural disasters

• Removable media such as tape provides full protection

= Protected by= Protected by mirrored diskmirrored disk

= Not fully protected= Not fully protected without removablewithout removable tape tape mediamedia

Protection from Mirrored Disk