[Users] how to refresh REGISTER state when restarting redundant proxy

[Andreas Granig]

Juha,

Juha Heinanen wrote:
> my understanding is that you cannot in 5.0 do alter table on NDBCLUSTER
> table:
>   
>   It is not possible to make online schema changes such as those
>   accomplished using ALTER TABLE or CREATE INDEX, as the NDB Cluster
>   engine does not support autodiscovery of such changes. 
> 
> mysql it is not a production quality system, if user needs to hassle
> with this kind of basic procedure.

See http://dev.mysql.com/tech-resources/articles/mysql-cluster-50.html

This seems to conflict with the statement from the cluster-limitations 
docs. However, if you do it in single-user-mode, it works. Otherwise you 
may get errors regarding invalid schema infos on other sql nodes, which 
then have to be restarted (with the local ndb tables of the sql nodes 
being deleted) to work again.

Andreas

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