GlossaryΒΆ

HVM
Hardware virtualization mode, where the virtual machine is oblivious to the fact that’s being virtualized and all the hardware is emulated.
LogicalUnit
The code associated with an OpCode, e.g. the code that implements the startup of an instance.
OpCode
A data structure encapsulating a basic cluster operation; for example, start instance, add instance, etc.
PVM
Para-virtualization mode, where the virtual machine knows it’s being virtualized and as such there is no need for hardware emulation.
watcher
ganeti-watcher is a tool that should be run regularly from cron and takes care of restarting failed instances, restarting secondary DRBD devices, etc. For more details, see the man page ganeti-watcher(8).

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