1

Am moving a Win2003 server onto Amazon. I'd like to build it on the On Demand instance first, then if all goes well, move to a Reserved.

Question: Is there any way to move from On Demand to Reserved, or will I have to manually rebuild the machine again.

Its not an easy build and I don't want to have to do it again :-)

  • "Its not an easy build and I don't want to have to do it again :-)" You're in for a world of hurt if you can't rebuild your instance. It will at some point crash in EC2 i can almost guarantee it will happen. Make sure you have a backup to easily recover from a failure. – bwight Apr 5 '12 at 17:18
  • Thanks for the heads up. I am documenting my build as I go. Whats your strategy for recovering from failure..am on a non EBS backed route, and will have important data and legacy db (MSDE) on the VM. – Dave Mateer Apr 5 '12 at 17:56
  • I generally have everything backed up in S3. I have a non-interactive script to start the instance from the latest backup so in the event of a failure i just execute a command and its up in ~3 min. In most cases the servers are on loadbalancers and recovery is automated because of the autoscaling group and loadbalancer checks. – bwight Apr 5 '12 at 19:43
7

The whole on-demand vs. reserved instance thing is really just a matter of how you're billed by Amazon. The actual EC2 instances themselves are exactly the same.

Just purchase a reserved instance in the same AZ as your server is in currently, and your billing will be automatically changed to reflect the reserved rates.

  • +1 for this. I was hugely confused by this the first time. Wish Amazon had something in the console saying something like "this reserved instance is currently being filled by instance i-29304293" – ceejayoz Apr 5 '12 at 15:40
  • Amazon seems to have their own little ecosystem for terminology and functionality...makes their documentation a little sketchy to follow. Annoying. – Bart Silverstrim Apr 5 '12 at 15:44
  • 1
    So, You saying that we need to launch another instance and have two instead one in order to get billed as Reserved one on the first one? – medina Sep 24 '14 at 0:46
  • 1
    No, if you reserve an instance, you get credit for it if you have an instance running that matches the reservation criteria. – EEAA Sep 24 '14 at 1:25
  • @EEAA will it be reflected on the 'cost explorer' > daily cost report instantly? – Anthony Kong Sep 10 '17 at 2:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.