From: Scott Ribe <scott_ribe@elevated-dev.com>
To: Mariel Cherkassky <mariel.cherkassky@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: old cluster does not use data checksums but the new one does
Date: Sun, 5 May 2019 14:56:27 -0600
Message-ID: <D915857D-2C84-404E-AF6F-C56AD724ADBA@elevated-dev.com> (raw)
In-Reply-To: <CA+t6e1mP0Qzkw6HpoqeU6WN4_SbG0w=9MrZf3VhG9eMXBst2aw@mail.gmail.com>
References: <CA+t6e1mCtZsNsg2HVZHrS5ZUiQExj-=KRhC=+P61LttUvdKHyQ@mail.gmail.com>
<20190505120454.2zgsqcudz4eqquvy@momjian.us>
<CA+t6e1kE5ix3VHB_3RZfp=shZof_edgUk1sjbGxMd7eY81BmMA@mail.gmail.com>
<FA67AC22-5E1D-4A1A-99F6-C4D835FF0D37@elevated-dev.com>
<CA+t6e1mP0Qzkw6HpoqeU6WN4_SbG0w=9MrZf3VhG9eMXBst2aw@mail.gmail.com>
> On May 5, 2019, at 2:42 PM, Mariel Cherkassky <mariel.cherkassky@gmail.com> wrote:
>
> in aspect of upgrade, what will be faster, pg_upgrade or dump and restore each db in the cluster ?
>
> בתאריך יום א׳, 5 במאי 2019 ב-19:11 מאת Scott Ribe <scott_ribe@elevated-dev.com>:
> > On May 5, 2019, at 9:58 AM, Mariel Cherkassky <mariel.cherkassky@gmail.com> wrote:
> >
> > My only option is doing the upgrade with other tools and not with pg_upgrade ?
>
> Dump & restore; you're changing the on-disk file format, so attempts to use current disk files cannot work.
In my opinion, depends on your confidence in your disks & file system etc. For instance, given enterprisey hardware (channel per disk, no half-backed SATA multipliers, decent disks) + ZFS with appropriate redundancy, I wouldn't see the need. On the other hand, a desktop PC with some multi-disk USB box, and hell yeah I want checksums. Systems in between, harder judgment call...
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To: pgsql-admin@postgresql.org
Cc: scott_ribe@elevated-dev.com, mariel.cherkassky@gmail.com, bruce@momjian.us, pgsql-admin@lists.postgresql.org
Subject: Re: old cluster does not use data checksums but the new one does
In-Reply-To: <D915857D-2C84-404E-AF6F-C56AD724ADBA@elevated-dev.com>
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