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Maybe I'm missing something .. what's to stop me from buying reserved instances for the smallest instance within a class and then assigning these to the largest
by abrookewood 10y ago
Maybe I'm missing something .. what's to stop me from buying reserved instances for the smallest instance within a class and then assigning these to the largest instances in a class?
- joshma 10y agoI was wondering the same thing - my guess is that they added this hastily (maybe that's the wrong word; I"m sure it's not trivial to change) and haven't figured out how to remove all the sizes from the system. If anyone else knows, that'd be helpful - I'm thinking of just buying a ton of *.smalls... // Edit: Oops, maybe I misunderstood the parent. Sibling's right; you'd need 256 small RIs to make up for one 32xlarge RI. I'm wondering why we should ever buy 32xlarge RIs and lose granularity.
- abrookewood 10y agoOK, that makes sense - I missed the bit about normalisation.
- wmf 10y agoDue to normalization that would only cover 1/256th of the cost. https://aws.amazon.com/blogs/aws/new-instance-size-flexibility-for-ec2-reserved-instances/ https://aws.amazon.com/blogs/aws/new-instance-size-flexibili...
- thezilch 10y agoThe example gives [with my annotations] "m4.2xlarge [8 core] US East [...] can automatically apply to 2 m4.xlarge [4 core] instances in us-east-1a [AZ flexible] or 4 m4.large [2 core] instances in us-east-1b [AZ, again, flexible]". You reserve larger instances and can slice it up however you want with instances equal or lesser in core [and memory] size. The bigger win, for me, is the AZ flex, as it is a pain to manage multi-AZ setups.
- boulos 10y agoJust for clarification, that aspect was launched a few months ago: https://aws.amazon.com/about-aws/whats-new/2016/09/amazon-ec2-convertible-reserved-instances-and-the-reserved-instance-regional-benefit/ https://aws.amazon.com/about-aws/whats-new/2016/09/amazon-ec...