3 ms·
How long does it take to fail over to a second data center? Can you do it in less than 26 seconds? I can't.
by jacobian 17y ago
How long does it take to fail over to a second data center? Can you do it in less than 26 seconds? I can't.
- smhinsey 17y agoAccording to Amazon, EC2 can remove a server from an Elastic Load Balancer rotation at a polling interval of 5 seconds. You can pool servers in different availability zones into the same ELB. I'm not sure the question even makes sense in that context, which I sort of view as the logical extreme of what davidu wrote.
- ensignavenger 17y agoPardon my ignorance, but what happens when the datacenter hosting the load balancer goes down? Are the load balncers redundant across data centers?
- smhinsey 17y agoIn short, yes. There's a good description of it here. http://clouddevelopertips.blogspot.com/2009/07/elastic-in-elastic-load-balancing-elb.html http://clouddevelopertips.blogspot.com/2009/07/elastic-in-el...
- lsc 17y agoI've worked places that had that setup with BGP. Of course, you need to announce the same IP block out of both data centers, your application needs to be able to deal with that, and that sort of thing gets pricy, but it's doable.