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OVDB_INIT

NAME
SYNOPSYS
DESCRIPTION
OPTIONS
UPGRADING
HISTORY
SEE ALSO

NAME

ovdb_init − Prepare ovdb database for use

SYNOPSYS

ovdb_init ["−u"|"−r"]

DESCRIPTION

This command must be run before any other process can access the overview database. It performs the following steps:

	1.		Creates the database environment, if necessary
	2.		If the database is idle (and if the `"−u"` option is not specified), it performs a normal recovery. The recovery will remove stale locks, recreate the memory pool cache, and repair any damage caused by a system crash or improper shutdown.
	3.		If the `"−u"` option is specified, it performs any necessary upgrades to the database. See the UPGRADING section below.
	4.		Starts the DB housekeeping processes (ovdb_monitor) if they’re not already running. (Unless the `"−r"` option is specified).
	5.		Starts the ovdb readserver (ovdb_server) processes if readserver in ovdb.conf is true, and if they are not already running. (Unless the `"−r"` option is specified).

Returns exit status of 0 if all steps were completed successfully. In the event of an error, messages are written to syslog and/or stderr.

If a recovery was attempted but it failed, the database may be damaged beyond repair, requiring a rebuild with makehistory(8).

This command is normally invoked automatically by rc.news(8).

It is OK to run this command multiple times.

OPTIONS

"−r"

Perform recovery only. "ovdb_monitor" is not started.

"−u"

Perform any needed upgrades. Recovery is not attempted. "ovdb_monitor" is started if the upgrade succeeded.

UPGRADING

There are two situations in which the database will need to be upgraded:

	•		You upgrade the Berkeley DB library to a newer version, for example from 2.7.7 to 3.1.17. In this case, the Berkeley DB db−>upgrade() method is used.
	•		You upgrade ovdb to a newer major version; i.e., ovdb−1.0 to ovdb−2.0.

In both of these cases, the database is upgraded in-place; and the upgrade can not be undone. Do not interrupt the upgrade process once it has started, because there is a risk of irrepairable corruption. The upgrade may take several minutes to complete. If an upgrade does get interrupted, try running the upgrade again.

Here’s an example procedure to upgrade a database created with Berkeley DB 2.7.7 to use Berkeley DB 3.1.17:

	1.		Build and install the Berkeley DB 3.1.17;
	2.		Run configure in the INN source tree and make sure it picks up the right Berkeley DB directory (e.g., /usr/local/BerkeleyDB.3.1);
	3.		Do a `"make"`;
	4.		Shut down INN (e.g., with `"rc.news stop"`) and be sure to kill all instances of nnrpd as well;
	5.		Do a `"make update"` to install the new binaries;
	6.		Run `"ovdb_init −u"` as the news user;
	7.		Start INN with `"rc.news"`.

It is OK to specify "−u" even if no upgrades are needed.

HISTORY

Written by Heath Kehoe <hakehoe@avalon.net> for InterNetNews.

$Id: ovdb_init.pod 7851 2008−05−26 19:33:08Z iulius $

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