ovdb_init - Prepare ovdb database for use
This command must be run before any other process can access the overview
database. It performs the following steps:
- Creates the database environment, if necessary
- 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.
- If the "-u" option is specified, it performs any
necessary upgrades to the database. See the UPGRADING section below.
- Starts the DB housekeeping processes (ovdb_monitor) if
they're not already running. (Unless the "-r" option is
- 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
This command is normally invoked automatically by rc.news
It is OK to run this command multiple times.
- Perform recovery only. "ovdb_monitor" is not
- Perform any needed upgrades. Recovery is not attempted.
"ovdb_monitor" is started if the upgrade succeeded.
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
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:
- Build and install the
Berkeley DB 3.1.17;
- Run configure in the INN source tree and make sure it picks
up the right Berkeley DB directory (e.g.,
- Do a "make";
- Shut down INN (e.g., with "rc.news stop") and be
sure to kill all instances of nnrpd as well;
- Do a "make update" to install the new
- Run "ovdb_init -u" as the news user;
- Start INN with "rc.news".
It is OK to specify "-u" even if no upgrades are needed.
Written by Heath Kehoe <email@example.com> for InterNetNews.
$Id: ovdb_init.pod 9765 2014-12-07 21:07:34Z iulius $