I have explained in my previous blog about saving cost using RI and how we can plan. Let’s looks at the combinations of Runbooks and Reserved instances in this blog to save the cost further. We should be careful to get the cost savings out of this model.
You can power off the VMs in non-production environment to save cost when not in use. You can use the runbooks to schedule the Power on and off of the VMs. The below table will provides an insight on what level of cost saving can be brought using runbooks.
If you power off your VMs after your working hours and holidays you would be saving almost up to 76%. I have placed the 3 VMs in different time duration to explain the RI calculation later in this blog. I considered 22 days in a month which excludes weekends
Table 1 – Saving using Runbooks
However, if you consider public holidays, it would be more savings for sure. The runbooks provide cost savings more than 1-year RI and 3 years RI which are 21% and 34% respectively. This proves that RIs do not suit for your non-production environment because runbooks give you more cost savings than RI. So, you may consider RIs only for the production environment unless you see good amount of usage in the non-production environment. Continue reading “Save Cost with combinations of Runbooks and Reserved Instances”