For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

manc_63343's avatar
manc_63343
Icon for Nimbostratus rankNimbostratus
May 04, 2011

How do other co's use Global Load Balancing with multiple DC?

How do companies like google, yahoo use global load balancing accross multiple data centers? When I do nslookup I see they are doing DNS round robin within each data center.     nslookup gmai...
config
design
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
May 05, 2011
Hi Manc,

 

 

Some major services do use a single IP. You can check netcraft for some examples that are using GTM with a single IP response per A query. When clients to get multiple IPs in the same datacenter, it could be multiple virtual servers that all do a hash based load balancing/persistence to get clients back to the same app instance. Or they could have shared memory/database for session information and not need to persist sessions to the same application instance. There are quite a few options in this area.

 

 

Here's an interesting discussion on ServerFault with a few relevant points:

 

http://serverfault.com/questions/69870/multiple-data-centers-and-http-traffic-dns-round-robin-is-the-only-way-to-assure

 

 

Are you trying to address something specific in your situation?

 

 

Aaron