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Installing MusicBrainz Database

From: andrew cooke <andrew@...>

Date: Fri, 11 Mar 2011 08:20:58 -0300

I just installed the MusicBrainz database.  It was a little more complex than
I expected, so here are my notes on what to do.

First, it requires an unusual combination of collation and encoding (actually,
not so strange, but different from the default install on OpenSuse).  Since I
already use Postgres, and these are set per *installation* (not per database),
I needed a parallel install of Postgres.

That meant creating a new data directory (data2) in /var/lib/pgsql and then
configuring new configuration and init scripts:

 * Copy /etc/sysconfig/postgresql to /etc/sysconfig/postgresql2 and change the
   contents to have:


 * Change /etc/init.d/postgresql to remove only /tmp/.s.PGSQL.5432 and not
   /tmp/.s.PGSQL.* (IMPORTANT!)

 * Copy /etc/init.d/postgresql to /etc/init.d/postgresql2 and
   change to match the diff below
> diff /etc/init.d/postgresql /etc/init.d/postgresql2
< # /etc/init.d/postgresql
> # /etc/init.d/postgresql2
< # /(usr/)sbin/rcpostgresql
> # /(usr/)sbin/rcpostgresql2
< # Provides:       postgresql
> # Provides:       postgresql2
< PG_SYSCONFIG=/etc/sysconfig/postgresql
> PG_SYSCONFIG=/etc/sysconfig/postgresql2
< eval DATADIR=${POSTGRES_DATADIR:-~postgres/data}
> eval DATADIR=${POSTGRES_DATADIR:-~postgres/data2}
< PIDFILE=$DATADIR/postmaster.pid
> PIDFILE=$DATADIR/postmaster2.pid
<           "$INITDB --locale=$LANG --auth=\"ident\" $DATADIR &> initlog" ||
>           "$INITDB --locale=$LANG --encoding=UNICODE --auth=\"ident\"
   $DATADIR &> initlog" ||
<               rm -f /tmp/.s.PGSQL.5432 $PIDFILE
>               rm -f /tmp/.s.PGSQL.5433 $PIDFILE

 * Link the new init file from /usr/sbin/rcpostgresql2 (see the link there for
   the original)

With those changes (and chkconfig -a) the new postgres instance will run,
listening on port 5433.  Note that when you use this database, you always need
to add "-p 5433" to commands.  So, for example, to list databases:

  psql -l -p 5433

Next, configure that database and install the data.  This largely follows the
MusicBrainz site instructions, once you figure them out.

Since I only wanted the database, but wanted it complete, I decided to use the
server install scripts (the site has an alternative install process that
doesn't use the install scripts, but which looked a little unreliable -
mentioned things like not setting foreign keys...).

To do this, download both the latest data and the code from

Next, look at the INSTALL file you downloaded and make sure all requirements
are installed.  I don't like CPAN, but the Strings::ShellQuote module is not
listed in Yast, so I needed to use CPAN to install that.

I decided that the Postgres databases would be mbrainz and mbrainz_raw, and
that I would configure the initial database creation as postgres, then use the
database as myself (andrew).  So I configured pg_hba.conf with:

 local   mbrainz     mbrainz                           ident map=mb_map
 local   mbrainz_raw mbrainz                           ident map=mb_map

(note that these lines must be before "local all all") and pg_ident.conf with:

 mb_map        andrew             mbrainz

and then start postgres (or restart if it was running before these changes).

Finally, configure cgi-bin/DBDefs.pm.  I had entries:

        READWRITE => {
            database    => "mbrainz",
            username    => "mbrainz",
            password    => "",
            host        => "",
            port        => "5433",

        SYSTEM  => {
            database    => "template1",
            username    => "postgres",
            password    => "",
            host        => "",
            port        => "5433",

       RAWDATA => {
            database    => "mbrainz_raw",
            username    => "mbrainz",
            password    => "",
            host        => "",
            port        => "5433",

In particular, note the 5433 port numbers.

With all the configuration done, install worked smoothly.

As postgres:

 ./admin/InitDb.pl --createdb --empty-database

As myself:

 ./admin/InitDb.pl --import ../20110309-000002/mbdump*.tar.bz2

It's worth mentioning that you do need all the data.  I tried to load
everything but one file, which I thought I would not need, and got an error
(one that googling associated with an incorrect source code version, which was


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