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internall by Ganeti as an *OpCode* (abbreviation from operation
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code). These OpCodes are executed as part of a *Job*. The OpCodes in a
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single Job are processed serially by Ganeti, but different Jobs will be
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processed (depending on resource availability) in parallel.
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processed (depending on resource availability) in parallel. They will
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not be executed in the submission order, but depending on resource
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availability, locks and (starting with Ganeti 2.3) priority. An earlier
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job may have to wait for a lock while a newer job doesn't need any locks
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and can be executed right away. Operations requiring a certain order
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need to be submitted as a single job, or the client must submit one job
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at a time and wait for it to finish before continuing.
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For example, shutting down the entire cluster can be done by running the


  		





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command ``gnt-instance shutdown --all``, which will submit for each


  		












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