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Add pg_rewind --no-sync

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This is an option consistent with what pg_dump and pg_basebackup provide
which is useful for leveraging the I/O effort when testing things, not
to be used in a production environment.

Author: Michael Paquier
Reviewed-by: Heikki Linnakangas
Discussion: https://postgr.es/m/20180325122607.GB3707@paquier.xyz
This commit is contained in:
Michael Paquier
2018-07-10 08:51:10 +09:00
parent 9a4059d4ff
commit 8a00b96aa9
3 changed files with 30 additions and 4 deletions
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16
doc/src/sgml/ref/pg_rewind.sgml
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@ -171,6 +171,22 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-N</option></term>
<term><option>--no-sync</option></term>
<listitem>
<para>
By default, <command>pg_rewind</command> will wait for all files
to be written safely to disk. This option causes
<command>pg_rewind</command> to return without waiting, which is
faster, but means that a subsequent operating system crash can leave
the synchronized data folder corrupt. Generally, this option is
useful for testing but should not be used when creating a production
installation.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-P</option></term>
<term><option>--progress</option></term>