Janitor Monkey creates a log in AWS's SimpleDB service tracking its work. Netflix says for most users, the table is small enough that the database fits within Amazon's free usage tier. Netflix says it plans to continually develop Janitor Monkey as well, including broadening the scope of resources it monitors. Right now, Janitor Monkey scans instances, EBS Volumes, EBS Volume Snapshots and Auto Scaling Groups. Netflix hopes to include launch configurations, security protocols and Amazon Machine Images (AMIs). Netflix also has a user interface to control Janitor Monkey, which it plans to open source in the future as well.
There is a growing group of tools to help companies track and optimize their cloud usage. Some are specific to Amazon's cloud, such as Newvem, which recently began charging money to use some of its services. Other players in the market include Cloudyn and Cloud Cruiser, among others. In addition to providing analysis of cloud usage, those services also recommend to customers which specific instances types are best sized and most cost-effective for the customer to use, which are features beyond the scope of the Janitor Monkey tool.