Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

promptcloud.com

Post reply on HN
Print view View original

11–20 of 39 posts

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#11

Post by promptcloud »

Eclyps wrote: post #3

I like the idea, it's just a bit difficult to use for what I'm getting out of it. Simple things like making clear what the "number of days" slider means (it didn't take long to figure it out, but I had to use the context to draw my conclusion). I'm used to seeing my instances in the typical "t1.micro, m1.small, m1.medium, etc" format, so I was a bit thrown off by the "Instance Category" dropdown. It would also be nic…

Thanks for the feedback. We are doing the "t1.micro, m1.small .."translation right now. (Edit : changes pushed)

X axis value seems to be some browser issue. On some browsers it shows up only at reduced zooms. Will fix it.

Also, we are not trying to replace AWS cost calculator. It was more like putting our own dog food out to answer the question, that at what point/usage is the reserved instance better than on demand.

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#12

Post by rschmitty »

ealexhudson wrote: post #5

I'm not sure how these calculations are correct - I have eu-west-1 set up, and the price for 1yr heavy reserved is fixed. But the AWS pricing still has an hourly rate against it. The final cost looks right, but the initial cost (eg., taking out the reservation but never running the instance) should just be the setup cost I think?

maybe he/she was assuming if you are going for heavy reservation you will be using 100% of hours? the other reserved instance pricing changes with hours

havent done a check to see if he was taking into account the discounted hourly price or just adding on on-demand hours...

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#13

Post by promptcloud »

ealexhudson wrote: post #9
Eclyps wrote: post #7

Earlier quoted context omitted.

When you reserve an instance, it doesn't entirely eliminate the hourly cost to run it. What you are essentially doing is paying a large chunk up-front in exchange for a heavily discounted hourly rate, which ends up saving you money by the end of your 1 - 3 year contract.

Isn't that what I'm saying? That the cost should increase, albeit at a much more gradual rate, from the start of the term to the end?

Heavy utilization reservation is different. See this page http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceS...

Quote from the page above " Light and Medium Utilization Reserved Instances also are billed by the instance-hour for the time that instances are in a running state; if you do not run the instance in an hour, there is zero usage charge. Partial instance-hours consumed are billed as full hours. Heavy Utilization Reserved Instances are billed for every hour during the entire Reserved Instance term (which means you’re charged the hourly fee regardless of whether any usage has occurred during an hour). "

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#15

Post by ealexhudson »

promptcloud wrote: post #13
ealexhudson wrote: post #9

Earlier quoted context omitted.

Isn't that what I'm saying? That the cost should increase, albeit at a much more gradual rate, from the start of the term to the end?

Heavy utilization reservation is different. See this page http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceS... Quote from the page above " Light and Medium Utilization Reserved Instances also are billed by the instance-hour for the time that instances are in a running state; if you do not run the instance in an hour, there is zero usage charge. Partial instance-hours consumed are billed as full hours. Heav…

Full marks for demonstrating that the AWS pricing schedule can continue to hold surprises :-)

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#16

Post by promptcloud »

jareds wrote: post #14

Is there any plans on making this tool accessible? I'm a screen reader user and the sliders don't appear to work with Firefox and Jaws.

Sorry for not looking into it earlier, but our own expertise in UI is limited, will seek help and try to fix it ASAP.

Re: Show HN: AWS EC2 On-demand vs. Reserved Interactive Price Comparison

#19

Post by promptcloud »

photorized wrote: post #18

For 30 days 24hr scenario, "Total cost of instance" graph is showing bogus numbers on the iPad. Let me know if you are unable to replicate and need a screenshot.

Yes that will be good, please send the screenshot to info "ta" promptcloud.com
Post reply on HN