On Thu, Mar 14, 2019 at 1:23 AM Michael Paquier <mich...@paquier.xyz> wrote:
> On Wed, Mar 13, 2019 at 12:24:21PM +0100, Magnus Hagander wrote: > > Enabling or disabling the checksums offline on the master quite clearly > > requires a rebuild of the standby, there is no other way (this is one of > > the reasons for the online enabling in that patch, so I still hope we can > > get that done -- but not for this version). > > I am curious to understand why this would require a rebuild of the > standby. Technically FPWs don't update the checksum of a page when it > is WAL-logged, so even if a primary and a standby don't agree on the > checksum configuration, it is the timing where pages are flushed in > the local instance which counts for checksum correctness. > Are you suggesting we should support running with a master with checksums on and a standby with checksums off in the same cluster? That seems.. Very fragile. -- Magnus Hagander Me: https://www.hagander.net/ <http://www.hagander.net/> Work: https://www.redpill-linpro.com/ <http://www.redpill-linpro.com/>
