Changing the default size for binary files as attachments to to events

Product/components used and version/fix level:

eu-latest, Backend 1017.0.216, C8Y Version 10.17.0

Detailed explanation of the problem:

Currently I am trying to figure out how to increase the default binary files size for event attachments using the REST API (Cumulocity IoT - OpenAPI Specification). By default, this value is set to 50 MiB, which is not enough for my use case. I’ve already tried to change the system option max.size (Cumulocity IoT - OpenAPI Specification), but this came without success.

In general big file uploads should be avoided if somehow possible.

Reason: They are stored in the mongoDB which is using high performance disks and are not meant to store big files. Still you can upload files if they are needed for Cumulocity e.g. log files, software images but in general when exceeding the platform limit I would store them externally in a cheap binary store and reference to that file within Cumulocity.

Still, you might be able to change the file limit per instance. In public cloud environments this is not supported.