Hi, I already brought up this topic with Thomas Müller, but he asked me to discuss it directly here on oak-dev. So here it goes.
We should have the possibility to create backup during normal operation of the repository, without shutting down the repository and without major impact to read or write performance. A true online backup. A bonus would be if this backup facility is additionally able to produce a diff to the latest backup (incremental backup). Besides the scalability topics already discussed I see this as a major painpoint in projects. cheers, Jörg