[jboss-user] [JBoss Messaging] - MySQL in Cluster question

jbabad do-not-reply at jboss.com
Wed Feb 4 12:47:26 EST 2009


We're using JBoss 5.0.0.GA with it's JBM and want to use a MySQL cluster as the underlying DataSource.

Currently we're using MySQL 5.0.51 - so the cluster is in-memory.
What will the maximum message size that we can send. I've seen a note on the MySQL site that mentions that there's an 8K limitation on a table row in the cluster. So, question is that the JBM_MSG table stores the headers and payload as blobs and we could be sending TextMessages of 10k characters or more. Would this be a problem?

I'm a bit puzzled as I've managed to send a 10k message through the cluster - but I'm worried whether I'm missing anything.

I have had a bit of a trawl through the forums but couldn't see anything that quite fitted the bill.

As a follow-on question what would be the effect if we could upgrade either to MySQL 5.1.x or possibly to MySQL NDB Cluster 6.x?

Any help would be appreciated.


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