14.3.1.3. Virtualization Networking Issues

When running multiple virtual machines on a host, be aware of the networking implications of each virtualized instance. If your host machine has only one network card, then you share the networking throughput for all of your machines through only one card, and this can severely limit the performance of your virtual environments.

If possible, use multiple network cards to support your virtualized instances. Depending on the expected load of each instance, dedicate or spread the allocation of the virtual network devices across these physical devices to ensure that you do not reach saturation.

If you are using packaged virtual machines as the basis for deployment of your MySQL database solution, make sure that the network interfaces are correctly reconfigured. Some solutions duplicate the hardware MAC address, which causes problems when you start up additional instances of the same virtualized environment.

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