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MySQL Cluster 7.0: careful with ndb_mgmd and –configdir

September 18th, 2009 Leave a comment Go to comments

Using MySQL Cluster 7.0, if you start the management node it will write a binary, cached version of the configuration. The default location is (currently) a bit tricky, if you compile yourself, you’ll find it in: <BASEDIR>/mysql-cluster.
Make sure to specify everytime the --configdir option when starting the ndb_mgmd. 

shell> ndb_mgmd -f config.ini --configdir=/path/to/cachedir

I’m using the same value as Datadir for the --configdir option.
An elegant solution it is not, IMHO. Maybe it’s good to make your own ndb_mgmd_safe?

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  1. Matthew Montgomery
    September 18th, 2009 at 18:29 | #1
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    Geert,

    ndb_mgmd will read the defaults file /etc/my.cnf or ~/.my.cnf for a [ndb_mgmd] block. Simply add a block like this:

    [ndb_mgmd]
    configdir=/path/to/cachedir
    config-file=/path/to/config.ini
    nbd-connectstring=host1:port,host2:port

    Then you can just call ndb_mgmd from the command line without passing any options.

  2. Geert JM Vanderkelen
    September 19th, 2009 at 05:51 | #2
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    Matthew,

    True, but you still got to set the option, whether it is in the option file or on the command line.
    And I can't, since I'm juggling to much between versions :)

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