Re: Offline enabling/disabling of data checksums

From: Sergei Kornilov <sk(at)zsrv(dot)org>
To: Michael Paquier <michael(at)paquier(dot)xyz>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Michael Banck <michael(dot)banck(at)credativ(dot)de>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Offline enabling/disabling of data checksums
Date: 2019-03-13 10:54:31
Message-ID: 5217311552474471@myt2-66bcb87429e6.qloud-c.yandex.net
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Hi

One new question from me: how about replication?
Case: primary+replica, we shut down primary and enable checksum, and "started streaming WAL from primary" without any issue. I have master with checksums, but replica without.
Or cluster with checksums, then disable checksums on primary, but standby think we have checksums.

Also we support ./configure --with-blocksize=(not equals 8)? make check on HEAD fails for me. If we support this - i think we need recheck BLCKSZ between compiled pg_checksum and used in PGDATA

regards, Sergei

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