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Prevent shutdown in normal mode if online backup is running, and

Browse Source 
have pg_ctl warn about this.

Cancel running online backups (by renaming the backup_label file,
thus rendering the backup useless) when shutting down in fast mode.

Laurenz Albe
This commit is contained in:
Magnus Hagander
2008-04-23 13:44:59 +00:00
parent cf23b75b4d
commit c979a1fefa
6 changed files with 115 additions and 14 deletions
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9
doc/src/sgml/ref/pg_ctl-ref.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_ctl-ref.sgml,v 1.44 2007/11/10 21:48:51 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_ctl-ref.sgml,v 1.45 2008/04/23 13:44:58 mha Exp $
PostgreSQL documentation
-->
@ -133,9 +133,10 @@ PostgreSQL documentation
In <option>stop</option> mode, the server that is running in
the specified data directory is shut down. Three different
shutdown methods can be selected with the <option>-m</option>
option: <quote>Smart</quote> mode waits for all the clients to
disconnect. This is the default. <quote>Fast</quote> mode does
not wait for clients to disconnect. All active transactions are
option: <quote>Smart</quote> mode waits for online backup mode
to finish and all the clients to disconnect. This is the default.
<quote>Fast</quote> mode does not wait for clients to disconnect and
will terminate an online backup in progress. All active transactions are
rolled back and clients are forcibly disconnected, then the
server is shut down. <quote>Immediate</quote> mode will abort
all server processes without a clean shutdown. This will lead to

7
doc/src/sgml/runtime.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.414 2008/04/17 20:56:41 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.415 2008/04/23 13:44:58 mha Exp $ -->
<chapter Id="runtime">
<title>Operating System Environment</title>
@ -1307,6 +1307,7 @@ sysctl -w vm.overcommit_memory=2
<listitem>
<para>
After receiving <systemitem>SIGTERM</systemitem>, the server
waits until online backup mode is no longer active. It then
disallows new connections, but lets existing sessions end their
work normally. It shuts down only after all of the sessions
terminate normally. This is the <firstterm>Smart
@ -1322,7 +1323,9 @@ sysctl -w vm.overcommit_memory=2
The server disallows new connections and sends all existing
server processes <systemitem>SIGTERM</systemitem>, which will cause them
to abort their current transactions and exit promptly. It then
waits for the server processes to exit and finally shuts down. This is the
waits for the server processes to exit and finally shuts down.
If the server is in online backup mode, backup mode will be
terminated, rendering the backup useless. This is the
<firstterm>Fast Shutdown</firstterm>.
</para>
</listitem>