Exchange 2010的高可用性
AD site: Dallas
Client Access
All clients connect Server
via CAS servers
AD site: San Jose Mailbox
Server 6
Client Access
Server Easy to stretch
across sites
Failover managed
Mailbox Mailbox Mailbox Mailbox Mailbox
Server 1 Server 2 Server 3 Server 4 Server 5
within Exchange
Database
centric failover
Exchange 2010 sizing
Server Max Cores Recommended Max RAM Recommended
Roles Cores RAM
4GB +
Mailbox 12 cores 8 cores 64GB
2-6MB/user
2GB/core
CAS 12 cores 8 cores 16GB
(8GB minimum)
1GB/core
Transport 12 cores 4 cores 16GB
(8GB minimum)
8GB +
All-In-One 16 cores 8 cores 64GB
2-6MB/user
2GB/core
UM 12 cores 4 cores 16GB
(4GB minimum)
~500-1000 users/core
Generally ~500 mailboxes/SATA/NL SAS disk
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19.
Feature comparison byexchange version
Exchange 2000/2003 Exchange 2007 Exchange 2010
IOPS 1 IOPS/heavy user .32 IOPS/heavy user .11 IOPS/heavy user
DB page size 4K 8K 32K
IO Pattern Random Random More sequential*
HA/DR Shared MSCS cluster for CCR for HA Continuous Availability
HA (no DR) SCR for DR /DAG for HA and DR
# of db copies 1 2 (more with SCR) Up to 16
Protection Server/app only Server/app and Server/app and
storage/data storage/data
Failover time ~2 min ~2 min ~30 sec
Failover Server Server Database
granularity
Max RAM 4GB 32GB 64GB
Backup Streaming or VSS Streaming or VSS clones Only VSS clones/snaps
methods clones/snaps on SAN /snaps off passive CCR
node
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20.
Agile Consolidated modelexample
6,000 mailbox architecture based on PS6000E + R710 + virtualization with 2 copies of
each database:
Two node DAG cluster
VM #1: Mailbox role w/3000 mailboxes
VM #2: HubCAS role
VM #3: Mailbox role w/3000 mailboxes
VM #4: HubCAS role
= database with 500 mailboxes
# = active copy of database
1 2 3 4
# = passive replica of database
5 6 7 8
9 10 11 12
RAID 5
1 2 3 4
5 6 7 8
9 10 11 12
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21.
Simple distributed modelexample
6,000 mailbox architecture based on R510 using internal storage and 3 copies of
each database:
Four node DAG cluster
Mailbox/Hub/CAS role Mailbox/Hub/CAS role Mailbox/Hub/CAS role
1500 mailboxes 1500 mailboxes 1500 mailboxes
1 2 3 4 10 11 12 1 7 8 9 10
5 6 7 8 2 3 4 5 11 12 1 2
9 6 3
Mailbox/Hub/CAS role
1500 mailboxes RAID 0
= database with 500 mailboxes
# = active copy of database
4 5 6 7
# = passive replica of database
8 9 10 11
12
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22.
SmB or branchoffice model example
1,000 mailbox architecture based on T610 using internal storage and 2 copies of
each database:
Two node DAG cluster
RAID 5
= database with 100 mailboxes
# = active copy of database
# = passive replica of database
Mailbox/Hub/CAS role Mailbox/Hub/CAS role
1500 mailboxes 1500 mailboxes
1 2 3 4 1 2 3 4
5 6 7 8 5 6 7 8
9 10 9 10
DELL CONFIDENTIAL 22