OVDB_INIT
NAMESYNOPSYS
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 $
SEE ALSO
ovdb(5), makehistory(8)
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