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pg_basebackup: Add option to create replication slot

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When requesting a particular replication slot, the new pg_basebackup
option -C/--create-slot creates it before starting to replicate from it.

Further refactor the slot creation logic to include the temporary slot
creation logic into the same function.  Add new arguments is_temporary
and preserve_wal to CreateReplicationSlot().  Print in --verbose mode
that a slot has been created.

Author: Michael Banck <michael.banck@credativ.de>
This commit is contained in:
Peter Eisentraut
2017-09-26 16:07:52 -04:00
parent 59597e6485
commit 3709ca1cf0
9 changed files with 112 additions and 41 deletions
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16
doc/src/sgml/ref/pg_basebackup.sgml
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@ -382,6 +382,18 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-C</option></term>
<term><option>--create-slot</option></term>
<listitem>
<para>
This option causes the replication slot specified by the
option <literal>--slot</literal> to be created before starting the
backup. In this case, an error is raised if the slot already exists.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-l <replaceable class="parameter">label</replaceable></option></term>
<term><option>--label=<replaceable class="parameter">label</replaceable></option></term>
@ -462,6 +474,10 @@ PostgreSQL documentation
the server does not remove any necessary WAL data in the time between
the end of the base backup and the start of streaming replication.
</para>
<para>
The specified replication slot has to exist unless the
option <option>-C</option> is also used.
</para>
<para>
If this option is not specified and the server supports temporary
replication slots (version 10 and later), then a temporary replication