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I've seen customers do this, but I think the more popular approach to
reduce the load on a single engine server is to have two engine servers
in the SAME driverset, but with one server running one set of driver
configs and another running another set. A driver cnofig's startup
option and status is server-specific so this is pretty simple. The
biggest hangup with this is possible confusion when it comes to knowing
which driver configs are (and should be) running on which server... the
server-specific stuff. Like most things, the advantage also is the
disadvantage to a small degree, but it at least is just the one DriverSet.

Good luck.
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