Exchange 2010 High Availability And Storage

Exchange 2010 High Availability
Harold Wong
IT Pro Evangelist
blogs.technet.com/haroldwong

Agenda
Exchange 2010 High Availability Fundamentals
End-to-End Availability Improvements
High Availability Fundamentals
High Availability Design Examples
Storage Improvements

E-Mail Trends
The average corporate user can expect to send and receive about 156 messages a day, and this number is expected to grow to about 233 messages a day by 2012. An increase of 33% over the four-year period. (Radicati, 2008)
Messages Sent/Received Per User/Day
“If e-mail stops, business stops”
Business users report that they currently spend 19% of their work day, or close to 2 hours/day on email. (Radicati, 2007)
“The company runs on e-mail”

High Availability ImprovementsKey benefits
Improved failover granularity
Simplified administration
Incremental deployment
Unification of CCR + SCR
Easy stretching across sites
Up to 16 replicated copies
Easier & cheaper to deploy
Easier & cheaper to manage
Better SLAs
Improved mailbox uptime
More storage flexibility
Reduced storage costs
Larger mailboxes
Further IO reductions
RAID-less / JBOD support
Better end-to-end availability
Easier & cheaper to manage
Better SLAs
Further IO reductions
RAID-less / JBOD support

Unified Platform for High Availability and Disaster Recovery
San Jose
Dallas
Mailbox Server
Mailbox Server
Mailbox Server
Recover quickly from disk and database failures
Replicate databases to remote datacenter
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3
DB4
DB4
DB4
DB5
DB5
DB5
Evolution of continuous replication technology
Combines the capabilities of CCR and SCR into one platform
Easier than traditional clustering to deploy and manage
Allows each database to have up to 16 replicated copies
Provides full redundancy of Exchange roles on two servers

Exchange 2010 High Availability Overview
AD site: Dallas
Client Access Server
All clients connect via CAS servers
DB1
Client
DB3
Mailbox Server 6
DB5
AD site: San Jose
Easy to stretch across sites
Failover managed within Exchange
Mailbox Server 1
Mailbox Server 2
Mailbox Server 3
Mailbox Server 4
Mailbox Server 5
Database Availability Group
DB1
DB1
DB1
DB4
DB2
DB5
DB3
DB2
DB5
DB3
DB4
DB1
Database centric failover
DB1
DB3
DB2
DB5
DB4

Database Availability Group (DAG)
Mailbox Servers
Mailbox Database
Database Copy
Active Manager
RPC Client Access Service (Active Manager Client)
High Availability Fundamentals
RPC Client Access Service
Active Manager
Active Manager
Active Manager
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3

Exchange 2010 HA FundamentalsDatabase Availability Group (DAG)
Group of up to 16 servers
Wraps a Windows® Failover Cluster
Defines the boundary of replication and failover/switchover
Mailbox Servers ….
Host the active and passive copies of multiple mailbox databases
Support up to 100 databases per server

Mailbox Database
Unit of Failover/Switchover
30 second Database Failover/Switchover
Database names are unique across an forest
Mailbox Database Copy
A database has one active copy in a DAG
A server may not host more than one copy of a given database
Replication of copies using Log Shipping
System tracks health of each copy
Exchange 2010 HA FundamentalsMailbox Databases and Copies

High Availability’s Brain
Manages which database copies should be active and passive
Source of definitive information on where a database is active and mounted
Active Directory is primary source for configuration information
Active Manager is primary source for changeable state information such as active and mounted
A process that runs on every server in DAG
Exchange 2010 HA FundamentalsActive Manager
Active
Manager

Incremental DeploymentReduces cost and complexity of HA deployments
Easy to add high availability to existing deployment
High availability configuration is post-setup
HA Mailbox servers can host other server roles
Datacenter 1
Datacenter 2
Mailbox Server 3
Mailbox Server 1
Mailbox Server 2
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3

Simplified ManagementReduces cost and complexity of management
HA Administration within Exchange
Recovery uses the same simple operation for a wide range of failures
Simplified activation of Exchange services in a standby datacenter

High Availability Management
demo

Use a VSS backup solution
Backup from any copy of the database/logs
Always choose passive (or active) copy
Backup an entire server
Designate a dedicated backup server for a given database
Restore from any of these backups:
Mailbox Server 3
Mailbox Server 1
Mailbox Server 2
DB1
DB1
DB1
VSS requestor
DB2
DB2
DB2
DB3
DB3
DB3
Exchange Server 2010 Backups

Storage ImprovementsPerformance enhancements enable new options
Exchange 2010 Storage Enhancements
70% reduction in IOPS
Smoother IO patterns
Resilience against corruption
Choose from a wide range of storage technologies without sacrificing system availability:
Storage Area Network (SAN)
Direct Attached w/ SAS Disks
JBOD SATA (RAID-less)
Direct Attached w/ SAS Disks

Lowering Exchange 2010 Storage Costs
Optimized for DAS storage
Use larger, slower, cheaper disks
Support larger mailboxes at lower cost
HA provides resilience from disk failures
HA Solution remains unchanged regardless of data volume size
JBOD/RAID-less storage now an option
Requires 3+ DB Copies

Exchange 2010 Cost Savings
Storage flexibility
Simplified management
Simplified site resilience
All server roles on one server (Small deployments)
3000 Mailboxes
2 Node Cluster
Double Server/Disk Failure Resiliency
24,000 Mailboxes
6 Node DAG
3 copies (JBOD)
4 x 2 Node CCR
2 copies (RAID)
Storage Cost savings examples

Automatic protection against loss of queued e-mails due to hardware failure
Simplifies hub and edge transport server upgrades and maintenance
Improved Transport Resiliency
X
Mailbox
Server
EdgeTransport
Servers keep “shadow copies” of items until they are delivered to the next hop
Edge Transport
HubTransport

Online Move MailboxLimit user disruption during mailbox moves and maintenance
Users remain online while their mailboxes are moved between servers
Sending messages
Receiving messages
Accessing entire mailbox
Administrators can perform migration and maintenance during regular hours
Also can be used to migrate users from on-premise server to Exchange Online
E-Mail Client
Exchange 2010 & Exchange 2007 SP2 Online
Exchange 2003 Offline
Mailbox Server 1
Mailbox Server 2

Hardware Load Balancer
Mailbox servers in a DAG can host other Exchange server roles
CAS/HUB/MAILBOX 2
CAS/HUB/MAILBOX 1
DB1
DB1
2 server configurations, should always use RAID
DB2
DB2
DB2
DB3
DB3
High Availability Design ExampleBranch office or smaller deployment

High Availability for Other Server Roles
Hardware load balancer (recommended) or Windows Network Load Balancing (NLB)
Client Access
No special configuration required (load balancing and failover is automatic)
Hub Transport
Edge Transport
Use DNS round robin, multiple MX records
Configure IP gateway to point to more than one UM server
Unified Messaging

High Availability Management (Closure)
demo

Exchange 2010 High Availability …..
Easier & cheaper to deploy
Simplified administration
Granular failover & recovery
Better end-to-end availability
One technology for both high availability and site resilience
Summary

Learn More About Exchange 2010
Community Resources
Technical Resources
Get Hands on Training
Exchange Team Blog
Exchange Forums
The New Efficiency Virtual Launch Experience
TechNet Exchange Website
Exchange Webcasts and Podcasts
www.thenewefficiency.com
http://technet.microsoft.com/en-us/exchange/default.aspx
http://technet.microsoft.com/en-us/exchange/bb288465.aspx
Training Offers—Exclusive for Launch Attendees
www.microsoft.com/learning/careeroffers
http://msexchangeteam.com/URL here
http://social.technet.microsoft.com/Forums/en-US/exchange2010/threads

© 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

Exchange 2010 High Availability And Storage

by Harold Wong on Oct 02, 2009

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