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