Microsoft Exchange Server 2010
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Transcript of Microsoft Exchange Server 2010
Exchange 2010 High AvailabilityHarold WongIT Pro Evangelistblogs.technet.com/haroldwong
High Availability Fundamentals
Storage Improvements
Agenda
Exchange 2010 High Availability Fundamentals
High Availability Design Examples
End-to-End Availability 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)
Business users report that they currently spend 19% of their work day, or close to 2 hours/day on email. (Radicati, 2007)
2008 2010 2012 20140
50
100
150
200
250
Messages Sent/Received Per User/Day
“The company runs
on e-mail”
“If e-mail stops,
business stops”
High Availability ImprovementsKey benefits
Easier & cheaper to manage
Better SLAs
Further IO reductions RAID-less / JBOD support
Better end-to-end availability
Reduced storage costs Larger mailboxes
Further IO reductions RAID-less / JBOD support
More storage
flexibility
Easier & cheaper to deploy
Easier & cheaper to manage
Better SLAs
Improved failover granularity
Simplified administration Incremental deployment Unification of CCR + SCR Easy stretching across
sites Up to 16 replicated copies
Improved mailbox uptime
Unified Platform for High Availability and Disaster Recovery
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
San Jose Dallas
Mailbox Server
DB1
DB3DB2
DB4DB5
Mailbox Server
DB1DB2
DB4DB5
DB3
Mailbox Server
DB1DB2
DB4DB5
DB3
Recover quickly from disk and database failures
Replicate databases to remote datacenter
Client Access Server
Mailbox Server 1
Mailbox Server 2
Mailbox Server 3
Mailbox Server 6
Mailbox Server 4
AD site: Dallas
AD site: San Jose
Mailbox Server 5
Failover managed within Exchange
Easy to stretch across sites
Client Access Server
All clients connect via CAS servers
Database Availability Group
Client
DB2
DB3
DB1 DB4
DB5
DB1
DB2
DB3
DB4
DB5
DB1
DB2
DB3
DB4
DB5
DB1
DB3
DB5
DB1
DB1
Database centric failover
Exchange 2010 High Availability Overview
Database Availability Group (DAG) Mailbox Servers Mailbox Database Database Copy Active Manager RPC Client Access Service
(Active Manager Client)
High Availability Fundamentals
DB2
DB1
DB2
DB3
DB1
DB2
DB3
DB1
Active Manager
Active Manager
Active Manager
DB3
Database Availability Group
RPC Client Access Service
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
Mailbox Server 1
Mailbox Server 2
Database Availability Group
Mailbox Server 3
Datacenter 1 Datacenter 2
DB2
DB3
DB1
DB2
DB3
DB1
DB2
DB3
DB1
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
DB2
DB3
DB1
DB2
DB3
DB1
DB2
DB3
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:
Exchange Server 2010 Backups
VSS request
or
DB1
Mailbox Server 1
Mailbox Server 2
Database Availability Group
Mailbox Server 3
Storage ImprovementsPerformance enhancements enable new options
Exchange 2010 Storage Enhancements
70% reduction in IOPS Smoother IO patterns Resilience against corruption
Read IOPS Write IOPS
Ex 2003
Ex 2007
Ex 2010
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)
Storage Cost savings examples
E2003 SCC (FC SAN)
E2007 CCR (SAS DAS)
E2010 DAG (SATA DAS)
$0
$5
$10
$15
$20
$25
$30
$35
$27
$19
$13
$0
$34
$21
Server/Storage Capex $/Mailbox
$/Mailbox (500 MB)
$/Mailbox (2 GB)
3000 Mailboxes2 Node Cluster
E2007 CCR (SAS DAS)
E2010 DAG (SATA DAS)
$0$5
$10$15$20$25$30$35
$32
$8
Hardware Capex $/Mailbox
$/Mailbox (2GB)
24,000 Mailboxes
4 x 2 Node CCR
2 copies (RAID)
6 Node DAG 3 copies (JBOD)
Double Server/Disk
Failure Resiliency
Automatic protection against loss of queued e-mails due to hardware failure
Simplifies hub and edge transport server upgrades and maintenance
Improved Transport Resiliency
Mailbox Server
HubTransport
Edge Transport
EdgeTransport
Servers keep “shadow copies” of items until they are delivered to the next
hop
X
E-Mail Client
Mailbox Server 1 Mailbox Server 2
Client Access Server
Exchange 2010 & Exchange 2007 SP2 Online
Exchange 2003 Offline
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
Online Move MailboxLimit user disruption during mailbox moves and maintenance
CAS/HUB/
MAILBOX 1
CAS/HUB/
MAILBOX 2
Mailbox servers in a DAG can host other Exchange server roles
Hardware Load Balancer
DB1
DB2
DB3
DB2
DB1
DB2
DB3
2 server configurations, should always use RAID
High Availability Design ExampleBranch office or smaller deployment
High Availability for Other Server Roles
Configure IP gateway to point to more than
one UM server
Unified Messaging
No special configuration required (load balancing and failover is automatic)
Hub Transport
Hardware load balancer (recommended) or Windows Network Load Balancing (NLB)
Client Access
Use DNS round robin, multiple MX recordsEdge
Transport
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
Technical Resources
The New Efficiency Virtual Launch Experience TechNet Exchange Website Exchange Webcasts and Podcasts
Get Hands on Training
Training Offers—Exclusive for Launch Attendees
Community Resources
Exchange Team Blog Exchange Forums
http://msexchangeteam.com/URL here
http://social.technet.microsoft.com/Forums/en-US/exchange2010/threads
www.microsoft.com/learning/careeroffers
www.thenewefficiency.com
http://technet.microsoft.com/en-us/exchange/default.aspx
http://technet.microsoft.com/en-us/exchange/bb288465.aspx
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