Transcript NYExUG_2009.11.10 - New York Exchange User Group

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Exchange Server 2007
Continuous Replication
2. Inspect logs
Database
Log
Log
E00.log
E0000000012.log
E0000000011.log
1. Copy logs
Local
Cluster
Database
3. Replay logs
Standby
File
Share
Log shipping to a local
disk
Log shipping within a cluster
Log shipping to a standby
server or cluster
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Exchange Server 2007 CCR + SCR
Outlook (MAPI)
client
OWA, ActiveSync, or
Outlook Anywhere
AD site: San Jose
Client Access
Server
CCR #1
Node A
CCR #1
Node B
Windows cluster
Manual
“activation” of
remote mailbox
server
AD site: Dallas
Client Access
Server
DB4
DB5
Standby
Server
Mailbox server
can’t co-exist
with other roles
CCR #2
Node A
DB6
SCR
CCR #2
Node B
Windows cluster
DB1
DB1
DB4
DB4
DB2
DB2
DB5
DB5
DB3
DB3
DB6
DB6
SCR managed
separately; no
GUI
Clustering
knowledge
required
Database failure
requires server
failover
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DB1
DB1
DB2
DB2
DB3
DB4
DB4
DB5
DB5
Make High Availability Exchange
deployments mainstream!
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Improved mailbox uptime
• Improved failover granularity
• Simplified administration
• Incremental deployment
• Unification of CCR + SCR
• Easy stretching across sites
• Up to 16 replicated copies
More storage flexibility
•
•
Further Input/Output (I/O)
reductions
RAID*-less/JBOD** support
Key Benefits
 Easier and cheaper to deploy
 Easier and cheaper to manage
 Better Service Level
Agreements (SLAs)
 Reduced storage costs
 Larger mailboxes
Better end-to-end availability
• Online mailbox moves
• Improved transport resiliency
 Easier and cheaper to manage
 Better SLAs
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*Redundant Array of Independent Disks (RAID)
**Just a Bunch of Disks (JBOD)
Keeping Users Connected
Keeping Users Connected
Keeping Users Connected
DAG
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Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
Mailbox
Server 4
Mailbox
Server 16
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Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
DB1
DB4
DB3
DB2
DB1
DB4
DB3
DB2
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RCA
Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
DB1
DB4
DB3
DB2
DB1
DB4
DB3
DB2
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Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
DB1
DB4
DB3
DB2
DB1
DB4
DB3
DB2
DB1
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Exchange Server 2010 High
Availability Fundamentals
Mailbox Database (Continued)
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Exchange Server 2010 High
Availability Fundamentals
Mailbox Database Copy
Mailbox
Server 1
DB1
Mailbox
Server 2
X
DB1
DB2
DB2
DB1
DB3
DB3
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Exchange Server 2010 High
Availability Fundamentals
Mailbox Database Copy
ActiveCopy
ActivationSuspended
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Database Availability Group
Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3
VSS requestor
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Site/server/disk failure
Archiving/compliance
Recover deleted items
Database Availability Group
Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
7-14 day lag copy
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3
X
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File
Share
File
Share
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File
Share
File
Share
File
Share
2 servers out -> manual
Single
Site 3
activation
of server
3
Nodes
In 3 server DAG, quorum is lost
3 HA Copies
DAGs with more servers sustain
JBOD
-> 3–physical
Copies
more
failures
greater resiliency
Mailbox
Server 1
Mailbox
Server 2
Mailbox
Server 3
X
Database Availability Group (DAG)
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CAS/HUB/
MAILBOX 1
CAS/HUB/
MAILBOX 2
DB2
Member servers of DAG
can host other server roles
2 server DAGs, with server
roles combined or not, should
use RAID
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Recovering
Primary
Data
Center
Failure Scenario:
Data
Center
Failure
Database
Server
Failure
Failure
1.
Verify
primary
data
Primary
data
fails is capable of hosting service
MBX-A-1
DB1center
fails
fails center
2.
Add
primary
data center
servers
back
to DAG:
Start-DatabaseAvailabilityGroup
–ActiveDirectorySite Redmond
Adjust
DNSfailover
records
SMTP
and
HTTPS
access
and adjust CAS configurationDAG1
(if necessary)
Automatic
tofor
MBX-A-2
3.
Reconfigure
DAG
to use
File Share Witness
in primary data center:
Set-DatabaseAvailabilityGroup
DAG1
–WitnessDirectory
Run
Stop-DatabaseAvailabilityGroup
DAG1 –ActiveDirectorySite
Redmond
–ConfigurationOnly (in both
data
MBX-A-1
DB1
is
fixed
is fixed
and
c:\fsw\dag1
–WitnessServer HT-A
centers)
becomes a copy
4.
Reseed
or allow
replication
to occur
and updateClusSvc
copies in primary data center
Stop thedata
cluster
service
on the nodes:
Stop-Service
5.
Schedule
downtime for the mailbox databases
and dismount them
Restore-DatabaseAvailabilityGroup
DAG1 –ActiveDirectorySite
“Bel Air” –AlternateWitnessDirectory
Legend
Active Database
6.
Change
MX
records
and
HTTP
access
back
to
primary
data
center
c:\fsw\DAG1 –AlternateWitnessServer HT-B
Database Copy
7.
Move
databases
to primaryblock
data center:
Move-ActiveMailboxDatabase DB1 –ActivateOnServer MBX-A-1
6.
Databases
mountback
(no activation
scenario)
8.
Mount databases in primary data center
Unhealthy? Database
Contoso.com (MX Record)
Autodiscover.contoso.com
Mail.contoso.com
Load Balance Array
Records
Edge-A
Proxy-A
2.1.x.x Perimeter Network
DC-A
HT-A
Proxy-B
Edge-B
2.2.x.x Perimeter Network
CAS-A
CAS-B
172.16.x.x “MAPI” Network
HT-B
DC-B
172.18.x.x “MAPI” Network
DAG1
DAG1
MBX-A-1
MBX-A-2
MBX-B-3
MBX-B-4
DB1
DB2
DB1
DB2
DB1
DB2
DB1
DB2
DB3
DB4
DB3
DB4
DB3
DB4
DB3
DB4
172.17.x.x “Replication” Network
AD Site Redmond
Outlook
2007/14
(MBX on DB1)
172.19.x.x “Replication” Network
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AD Site Bel Air
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One Technology for High Availability, Disaster
Recovery and Backup
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Catalog
Copy status
Crawling
Healthy
Healthy, DisconnectedAndHealthy,
DisconnectedAndResynchronizing,
or
SeedingSource
CopyQueueLength
ReplayQueueLength< 10 < 50
ReplayQueueLength
< 50
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Mailbox
Server 1
Mailbox
Server 2
X
DB1
DB1
Mailbox
Server 3
DB1
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