We use S3 swift proxy for swift storage and have built some infrastructure around it.

When we tried S3 for backup we got this error
xo-server[144792]: error: InvalidArgument: Part number must be an integer between 1 and 1000, inclusive

Swift defaults to max number of parts of 1000, as do several commercial S3 implementations, and we have tried increasing but it caused instability in one of applications built around swift SLO.

The solution I've implemented is to reduce the MAX_PART_NUMBER in
@xen-orchestra/fs/dist/s3.js to 1000, but this be overwritten on each upgrade.

Could an option be added into the AWS S3 parameters to set this? or even just being able to override the value in a configuration file somewhere.