This may seem like a good idea, but I've followed some discussions where it became clear it might not be the case. The misuse of this feature could actually be dangerous.<p>It's not really "support for incremental backups" as much as "within pg_basebackup". Other backup tools (such as pgBackRest) have had incremental backup support for quite some time, and more reliably, without this code.<p>I'm relaying information from others who are very knowledgeable about this. There are gotchas to this new feature:<p>- The filesystem has to POSIX compliant
- In order to rebuild the incrementals, they <i>all</i> need to be present in directories
- The feature adds no notion of a block structure, so each incremental must be laid on serially<p>It's unclear how useful this will be unless used by some very specific external tool that takes advantage of it.<p>Again, tools like pgBackRest has had incremental backup support for quite some time.