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Re: What is a master node in MySQL cluster
Posted by: Hartmut Holzgraefe
Date: May 15, 2009 02:01AM

bai liu Wrote:
-------------------------------------------------------
> Please see below, node 3 is a master node.

think of it as "internal coordinator"

it has no real consequences to the outside world
and we even have though about removing the "(master)"
output from SHOW results altogether already as it
doesn't really provide any useful information to
the user

> What's the side effect or impact if I restart it?

the "master" role will fail over to one of the other
data nodes immediately

PS: i can see that you are using cluster with MySQL 5.1.15
which was an early pre-GA release. Cluster is no longer
maintained in the MySQL 5.1 release branch at all anymore,
you should now always use the MySQL Cluster 6.3 or 7.0
release branches

--
Hartmut Holzgraefe, MySQL Regional Support Manager EMEA

Sun Microsystems GmbH, Sonnenallee 1, 85551 Kirchheim-Heimstetten
Amtsgericht Muenchen: HRB161028
Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Dr. Roland Boemer
Vorsitzender des Aufsichtsrates: Martin Haering

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Re: What is a master node in MySQL cluster
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May 15, 2009 02:01AM


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