> For the complete documentation index, see [llms.txt](https://docs.e6data.com/product-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.e6data.com/product-documentation/known-limitations/cloud-provider-limitations.md).

# Cloud Provider Limitations

## Spot Instance Interruptions

By nature, EC2 SPOT instances are cheaper because they can be taken back by AWS anytime. [Refer to the official AWS Documentation for more information.](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-interruptions.html) 

Due to the unpredictable nature of interruptions, e6data Clusters may not function correctly. Therefore, Spot instances are recommended only for non-critical workloads.

The following can occur depending on which e6data component was interrupted:

* Query execution failures
* Autoscaling failures
* Catalog creation & modification failures