Re: rsync and streaming replication

From: Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com>
To: Jean-Armel Luce <jaluce06(at)gmail(dot)com>
Cc: Scott Ribe <scott_ribe(at)elevated-dev(dot)com>, "[ADMIN]" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: rsync and streaming replication
Date: 2011-11-16 16:50:56
Message-ID: CAF6yO=3fjuokv9J80oW9oQWF9YdYxMcH_gSyfJ5KCKwiA5V_5w@mail.gmail.com
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2011/11/16 Jean-Armel Luce <jaluce06(at)gmail(dot)com>:
> Hi,
>
> Today I tried to promote a slave as master using rsync --checksum (without
> doing vacuum freeze) instead of rsync --all.
>
> It takes only 30 minutes with rsync --checksum.  Only a few tables are
> rsynced. Most of the time is consumed by checksum.
> With rsync --all, it takes 1h40 min.
>
> So, rsync --checksum looks better than rsync --all

rsync --all does not exist, you mean --archive I bet (the longopt for
-a, a shorthand for the options below plus -Dt for device/special and
time).
Also you probably want to keep --owner --group --perms --recursive
(or you do file by file with a find or something like that ?)

--
Cédric Villemain +33 (0)6 20 30 22 52
http://2ndQuadrant.fr/
PostgreSQL: Support 24x7 - Développement, Expertise et Formation

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