ORT scan results cleanup

[losmateusz1]

Currently ORT cache is not being cleared, scans that are failing due to various reasons have to be cleared directly from database. I wonder if ORT should have any mechanisms to ensure that scans that are failing are removed from database(or other scan storage) to trigger rescanning of packages?
Recently I only noticed one specific issue with scan results due to mistakes in configuration, and in this case solution was to remove scans that include in the message string "Failed to scan", but I assume that there might be less obvious cases that should also be cleared.

I have few questions:

1. Are there any plans for automatic retention of, potentially failed, scan results?
2. Are there any recommendations on maintaining the ORT cache in good shape?
3. Would that be a good idea to add a parameter that would clear scan results to force rescanning of all packages?

[mnonnenmacher]

Are there any plans for automatic retention of, potentially failed, scan results?

No, currently not, because it is as a permanent scan result storage, not a temporary cache. But with regards to failed scans in the storage there is a related bug report: #10054

Are there any recommendations on maintaining the ORT cache in good shape?

No, but I think the main problem is the bug mentioned above.

Would that be a good idea to add a parameter that would clear scan results to force rescanning of all packages?

I'm not sure, rescanning all packages can take a lot of time so in most cases it's probably to selectively remove some results.