Greetings, * Andres Freund (and...@anarazel.de) wrote: > On 2019-04-22 14:26:40 -0400, Stephen Frost wrote: > > I'm disappointed that the concerns about the trouble that end users are > > likely to have with this didn't garner more discussion. > > My impression is that endusers are having a lot more trouble due to > important backup/restore features not being in core/pg_basebackup, than > due to external tools having a harder time to implement certain > features.
I had been referring specifically to the concern I raised about incremental block-level backups being added to pg_basebackup and how that'll make using pg_basebackup more complicated and therefore more difficult for end-users to get right, particularly if the end user is having to handle management of the association between the full backup and the incremental backups. I wasn't referring to anything regarding external tools. > Focusing on external tools being able to provide all those > features, because core hasn't yet, is imo entirely the wrong thing to > concentrate upon. And it's not like things largely haven't been > implemented in pg_basebackup for fundamental architectural reasons. > It's because we've built like 5 different external tools with randomly > differing featureset and licenses. There's a few challenges when it comes to adding backup features to core. One of the reasons is that core naturally moves slower when it comes to development than external projects do, as was discusssed earlier on this thread. Another is that, when it comes to backup, specifically, people want to back up their *existing* systems, which means that they need a backup tool that's going to work with whatever version of PG they've currently got deployed and that's often a few years old already. Certainly when I've thought about features that we'd like to see and considered if there's something that could be implemented in core vs. implemented outside of core, the answer often ends up being "well, if we do it ourselves then we can make it work for PG 9.2 and above, and have it working for existing users, but if we work it in as part of core, it won't be available until next year and only for version 12 and above, and users can only use it once they've upgraded.." Thanks, Stephen
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