On 2/25/19 11:38 PM, Andres Freund wrote:
Hi,
On 2019-02-25 09:24:32 -0800, Christophe Pettus wrote:
But the resistance to major version upgrades is *huge*, and I'm
strongly biased against anything that will make that harder. I'm not
sure I'm communicating how big a problem telling many large
installations, "If you move to v12/13/etc., you will have to change
your backup system" is going to be.
I think you might be right about this specific issue. But to me it
sounds like you also don't appreciate that development resources are
really constrained too, and providing endless backward compatibility for
everything is going to use both resources directly, and indirectly by
making the whole system more complex. I've been on your side of this
fight a couple times (and largely lost), but I think it's important to
appreciate that it's all a balancing, and we all have valid reasons to
keep the balance between development pace / ease of use / ease of
upgrade the way we argue for them. Hard upgrading is going to reduce
adoption, but so is lack of feature development and too many creaky &
redundant & easy to misuse interfaces.
+1.
And those (like me) who are motivated to work in this area are put off
by the byzantine code and how easy it is to break things -- in large
part because of the *complete* absence of tests for exclusive mode.
I did a round of doc updates for non/exclusive backups a while back and
it was excruciating to measure and document the subtle differences in a
way that a user might possibly understand. I'm honestly not motivated
to come back to it until we remove the deprecated interfaces.
--
-David
da...@pgmasters.net
