# Serverless ML: FaaS and Lambda

Function-as-a-Service (FaaS) and Lambda functions are types of serverless systems. 

![An example of a common serverless website configuration. Source: NBS System](https://2327526407-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvBP1svpACTB1R1x_U4%2F-LwQYw4uYhsjhYJwMiRs%2F-LwQZg_c0lrUCbVR-aET%2Fimage.png?alt=media\&token=89bcaf71-54cb-48f7-b050-139d5c0b30b3)

Going serverless for model serving or inference *sounds* attractive.  Theoretically, there would be less infrastructure to manage and less idle GPU/CPU cost. 

In practice, however, cold-start times and other unavoidable hurdles have slowed widespread adoption.