Exchange Site to Site High Availability .
Planning for Huge Exhange Organization .
Expected Mailboxes : 12000-15000
Planning for CCR WITH SCR
Sites : Two Sites connected with High speed bandwidth .
Requirement : High Availability and smart solution .
SITE A :
Single Machine ------> Two Virtual Machines : Edge + Isa Server 2006 (DMZ )
Single Machine ------> Two Virtual Machines : Hub Server + CAS(NLB AMONG CAS )
Single Machine ------> Two Virtual Machines : Hub Server + CAS
Multiple Machines ------> Mailbox Servers
SAN ------> EMC HIGHILY EFFICIENT AND FAULT TOLERANT .
Maximum their are 10-15 databases but divided into four mailbox servers located into two different sites .
Mailbox 1 :
3 storage groups and single databse in each database :SG1-SG3
databses : DB1 - DB3 : 120 GB EACH
LOGS : 150 GB
RSG : 150 GB
Mailbox 2 :
3 storage groups and single databse in each database :SG4-SG6
databses : DB4 - DB6 : 120 GB EACH
LOGS : 150 GB
RSG : 150 GB
DR Site for Site A : SCR
Single Machine ------> Two Virtual Machines : Hub Server + CAS
Multiple machines for Mailbox Servers : having same configuration as source mailbox server have + San is also on DR Site A .
SITE B:
Single Machine ------> Two Virtual Machines : Edge(Backup MX ) + Isa Server 2006 (DMZ )
Single Machine ------> Two Virtual Machines : Hub Server + CAS(NLB AMONG CAS )
Single Machine ------> Two Virtual Machines : Hub Server + CAS
Multiple Machines ------> Mailbox Servers
SAN ------> EMC HIGHILY EFFICIENT AND FAULT TOLERANT .
Mailbox 1 :
3 storage groups and single databse in each database :SG7-SG9
databses : DB7 - DB9 : 120 GB EACH
LOGS : 150 GB
RSG : 150 GB
Mailbox 2 :
3 storage groups and single databse in each database :SG10-SG12
databses : DB10 - DB12 : 120 GB EACH
LOGS : 150 GB
RSG : 150 GB
DR Site for Site B : SCR
Single Machine ------> Two Virtual Machines : Hub Server + CAS
Multiple machines for Mailbox Servers : having same configuration as source mailbox server have + No SAN here.
Question :
my question is related to my design whether it is fine or it need some changes please advice ,second is that we have no SAN at site B so what is the recommended approach to site to site high availability,whether i have to placed four target mailbox servers there in DR SITE A as i have mentioned that i have no san in my site B ,please advice in this regards .
waiting for good reply .
Thanks
Syed Arsalan
syed.arsalan
All Replies
- It's been a while. Is this still an open question? Have you completed the buildout?
This type of post would be better if we could discuss the design one element at a time. Giving the whole thing a thumbs up or down is too broad a request. Also your details here are tough to follow.
Here are some bullets I have, but by no means a comprehensive review:
-how is the backup ISA server selected (in the event of a failure)? Is there a DNS based site selector or something else?
-you said CCR but then also a SAN. these are typically opposite concepts as the whole point of CCR is to remove SAN dependency
-you have 4 ht and cas, but only two with NLB?
i cant really follow this db/sg design
-you said scr. where is this?
please be more specific with your questions so that we can supply better answers.
