I haven't used it myself, but you might check out using Daffodil Replicator to replicate between Derby and MySQL. 


The only solution I know besides that is basically building some kind of replication system yourself, which is doable, but not a small effort.


On 9/26/06, Legolas Woodland <legolas.w@gmail.com> wrote:
thank you for reading my post
how i can create a replication between mysql as master and derby as details.
the situation is like this :
we insert some records into some Mysql tables then at certain point in
time we need to add all those record to Derby databases.

any general tutorial or manual for this kind of jobs ?
for example when we should commit , how to failover , checkpoints....