[Question]: Cache@2 only downloads files not available in target path?

[MTomBosch]

Task name

Cache

Task version

2

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Ubuntu

Question

Assuming I have a folder /var/cache which already has some content. And now the cache task should restore the cached files into that folder. What happens if files from the cache are already existing (same size, hash, ..) in the folder? 

Are the files still downloaded from the cache and then the local files overwritten or is there some incremental behaviour in the cache task to only download what is not yet there in the target path?

[ReneSchumacher]

Looking at the code of the task, the agent plugin, and Azure DevOps backend, the cache task always downloads and restores all cached files. This makes sense (imho), since checking each file individually might take even longer than just wiping out the target and restoring the cached files.

[MTomBosch]

OK. Thank you