Link to home
Create AccountLog in
Avatar of kam_uk
kam_uk

asked on

Active-Active clustering

Hi

We are running Windows 2003 Servers and I have an application that we're looking to bring in (let's call it Tech1). Tech1 needs to be available all the time and we don't want any disruption.

So far the options we have been given are (for 2 servers)

i. Active/Passive clustering
ii. Active/Active clustering

So let's say there are 2 servers, Server1 and Server2, that make up the cluster.

Am I correct in thinking that for Active/Passive clustering, if Server1 (the Active node) goes down, there will be downtime whilst services are 'moved' to Server2 (the Passive node)?

Whereas with A/A clustering, both servers can accept requests at the same time. If Server1 goes down, then Server2 can instantly access all of Server1's data with no loss in service? We just have to make sure that both servers have the hardware capacity to run with the full load?
SOLUTION
Avatar of Brian Pierce
Brian Pierce
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
membership
Create an account to see this answer
Signing up is free. No credit card required.
Create Account
SOLUTION
Link to home
membership
Create an account to see this answer
Signing up is free. No credit card required.
Create Account
Avatar of kam_uk
kam_uk

ASKER

Thanks both for the replies.

Basically, we have Tech1 clients on our PC's. These contact a vendor server on the Internet for various information (feeds etc).  The clients connect to the vendor server via the Tech1 server. So:

Tech1 clients > Tech1 Server > INTERNET > Vendor server

We want to go with HA options, and the Application supports both A/A and A/P clustering. It's important that, if we implement two Tech1 servers (whether in A/A or A/P), the failure of one server doesn't mean that there is a drop in connectivity between the clients and the feeds they are receiving. All Tech1 information is held on a SAN attached database.

From what I understand, if we implement:

A/P: Then if the first server goes down, there is a drop in service until the second service starts its services etc.

A/A: If the first server goes down, then there is no loss in service as the second server will just take the extra load
ASKER CERTIFIED SOLUTION
Link to home
membership
Create an account to see this answer
Signing up is free. No credit card required.
Create Account