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Emulab FAQ: Testbed Operations: What is the "Load Address" of an OS image?

Emulab FAQ: Testbed Operations: What is the "Load Address" of an OS image?

The "Load Address" shown on the Image Descriptor page is the assigned multicast group address.

The multicast group is used by frisbeed to send the compressed image file, in parallel, to the frisbee clients loading the same image. We use a different multicast address for each image.

The Load Address is generated by the frisbeelauncher script, which as its name suggests, starts frisbeed. There is also a "Frisbee pid", giving the process ID of the related frisbeed process.

When the frisbeed exits, we clear both the load address and frisbee pid in the Image ID.