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.\"
.IX Title "OVDB_INIT 8"
.TH OVDB_INIT 8 "2018-03-18" "INN 2.6.4" "InterNetNews Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
ovdb_init \- Prepare ovdb database for use
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBovdb_init\fR [\fB\-r\fR|\fB\-u\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This command must be run before any other process can access the
overview database.  \fBovdb_init\fR is normally invoked automatically by
\&\fBrc.news\fR when starting the news system.
.PP
\&\fBovdb_init\fR performs the following steps:
.IP "1." 4
Creates the database environment, if necessary.
.IP "2." 4
If the database is idle (and if the \fB\-u\fR 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.
.IP "3." 4
If the \fB\-u\fR option is specified, it performs any necessary upgrades
to the database.  See the \s-1UPGRADING\s0 section below.
.IP "4." 4
Starts the database housekeeping processes (\fBovdb_monitor\fR) if they are
not already running.  (Unless the \fB\-r\fR option is specified).
.IP "5." 4
Starts the ovdb readserver processes (\fBovdb_server\fR) if \fIreadserver\fR
in \fIovdb.conf\fR is true, and if they are not already running.  (Unless
the \fB\-r\fR option is specified).
.PP
Returns exit status of \f(CW0\fR if all steps were completed successfully.
In the event of an error, messages are written to syslog and/or stderr.
.PP
If a recovery was attempted but failed, the database may be
damaged beyond repair, requiring a rebuild with \fBmakehistory\fR.
.PP
This command can be run multiple times.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-r\fR" 4
.IX Item "-r"
Perform recovery only.  \fBovdb_monitor\fR is not started.
.IP "\fB\-u\fR" 4
.IX Item "-u"
Perform any needed upgrades.  Recovery is not attempted.
\&\fBovdb_monitor\fR is started if the upgrade succeeded.
.SH "UPGRADING"
.IX Header "UPGRADING"
There are two situations in which the database will need to be
upgraded:
.IP "\(bu" 4
You upgrade the Berkeley\ \s-1DB\s0 library to a newer version, for example
from 2.7.7 to 3.1.17.  In this case, the Berkeley\ \s-1DB\s0 db\->\fBupgrade()\fR
method is used.
.IP "\(bu" 4
You upgrade ovdb to a newer major version; i.e., ovdb\-1.0 (shipped with
\&\s-1INN\s0\ 2.3.0 up to \s-1INN\s0\ 2.3.5) to ovdb\-2.0 (since \s-1INN\s0\ 2.4.0).
.PP
In both of these cases, the database is upgraded in-place; and the
upgrade cannot 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.
.PP
Here's an example procedure to upgrade a database created with
Berkeley\ \s-1DB\s0\ 2.7.7 to use Berkeley\ \s-1DB\s0\ 3.1.17:
.IP "1." 4
Build and install the Berkeley\ \s-1DB\s0\ 3.1.17 version;
.IP "2." 4
Run configure in the \s-1INN\s0 source tree and make sure it picks up the
right Berkeley\ \s-1DB\s0 directory (e.g., \fI/usr/local/BerkeleyDB.3.1\fR);
.IP "3." 4
Do a \f(CW\*(C`make\*(C'\fR;
.IP "4." 4
Shut down \s-1INN\s0 (e.g., with \f(CW\*(C`rc.news stop\*(C'\fR) and be sure to kill all
instances of \fBnnrpd\fR as well;
.IP "5." 4
Do a \f(CW\*(C`make update\*(C'\fR to install the new binaries;
.IP "6." 4
Run \f(CW\*(C`ovdb_init \-u\*(C'\fR as the news user;
.IP "7." 4
Start \s-1INN\s0 with the \f(CW\*(C`rc.news\*(C'\fR command.
.PP
Note that the \fB\-u\fR option can be used even if no upgrades are needed.
.SH "HISTORY"
.IX Header "HISTORY"
Written by Heath Kehoe <hakehoe@avalon.net> for InterNetNews.
.PP
\&\f(CW$Id:\fR ovdb_init.pod 10241 2018\-02\-04 15:38:19Z iulius $
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBovdb\fR\|(5), \fBmakehistory\fR\|(8), \fBrc.news\fR\|(8).