How are EBS-based EC2 instances billed?

I’m working on a project that involves running a lot of spot instances over a short period of time, then terminating the spot reservation and starting the instances with a different AMI. If I reserve 500 spot EBS-backed EC2 instances for a day and they all have 8GB hard drive, am I paying for 500 EBS-days or 500 EBS-months (multiplied by 8GB)? If the latter, will terminating the instances and asking for new ones mean that I’m paying for another 500 EBS-months even if I use the machines just for one day?


Neither, really. EBS bills by hours.

Volume storage for General Purpose SSD (gp2) volumes is charged by the amount you provision in GB per month, prorated to the hour, until you release the storage.

Source : Link , Question Author : d33tah , Answer Author : ceejayoz

Leave a Comment