Hi, On 2019-03-29 11:38:02 -0400, Stephen Frost wrote: > The server-side function would essentially lock the page against i/o, > re-read it off disk into an independent location, unlock the page, then > calculate the checksum and report back?
Right. I think there's a few minor variations of how this could be done, but that'd be the basic approach. > That seems like it would be reasonable to me. Wouldn't it make sense to > then have pg_basebackup use that same function..? Yea, probably. Or at least reuse the majority of it, I can imagine the error reporting would be a bit different (sqlstates et al are needed for the basebackup.c case, but not the pg_checksum case). Greetings, Andres Freund
