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Subject: Re: old cluster does not use data checksums but the new one does
From: Scott Ribe <scott_ribe@elevated-dev.com>
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 <CA+t6e1mP0Qzkw6HpoqeU6WN4_SbG0w=9MrZf3VhG9eMXBst2aw@mail.gmail.com>
Date: Sun, 5 May 2019 14:44:30 -0600
Cc: Bruce Momjian <bruce@momjian.us>,
 pgsql-admin@lists.postgresql.org
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References: 
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 <20190505120454.2zgsqcudz4eqquvy@momjian.us>
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To: Mariel Cherkassky <mariel.cherkassky@gmail.com>
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> On May 5, 2019, at 2:42 PM, Mariel Cherkassky =
<mariel.cherkassky@gmail.com> wrote:
>=20
> in aspect of upgrade, what will be faster, pg_upgrade or dump and =
restore each db in the cluster ?

pg_upgrade is faster, potentially *MUCH* faster, but it does not allow =
you to change anything about the on-disk data structure, and storage of =
checksums is such a change.