Use of transaction context to select single database instance for global transaction

A server system comprising:

• a number of server instances, the server instances interacting with a number of database instances, the server instances including at least one multipool, the at least one multipool including connection pools for connecting to the database instances, the server instances having access to a shared transaction context for a global transaction, the transaction context indicating a single database instance for the global transaction, wherein each server instance that connects to a database instance for the global transaction connects to the single database instance.

A java database connectivity system comprising:

• a multipool including a number of connection pools to connect to database instances, wherein, in a global transaction, the multipool checks a shared transaction context, the transaction context being a software object that can be shared by multipools at different server instances, the transaction context indicating a single database instance for the global transaction, wherein the multipool connects to the single database instance indicated by the transaction context.