5 .. if you add new entries, keep the alphabetical sorting!
11 A term describing dynamic changes to an instance's memory while the instance
12 is running that don't require an instance reboot. Depending on the
13 hypervisor and configuration, changes may be automatically initiated by the
14 hypervisor (based on the memory usage of the node and instance), or may need
15 to be initiated manually.
18 BE stands for *backend*. BE parameters are hypervisor-independent instance
19 parameters, such as the amount of RAM/virtual CPUs allocated to an instance.
22 A block device driver that can be used to build RAID1 across the network or
23 across shared storage, while using only locally-attached storage.
26 HV stands for *hypervisor*. HV parameters describe the virtualization-
27 specific aspects of the instance. For example, a HV parameter might describe
28 what kernel (if any) to use to boot the instance or what emulation model to
29 use for the emulated hard drives.
32 *Hardware Virtualization Mode*. In this mode, the virtual machine is
33 oblivious to the fact that it is virtualized and all its hardware is
37 The code associated with an :term:`OpCode`; for example, the code that
38 implements the startup of an instance.
41 Local UniX Interface. The IPC method over :manpage:`unix(7)` sockets used
42 between the CLI tools/RAPI daemon and the master daemon.
45 *Out of Band*. This term describes methods of accessing a machine (or parts
46 of a machine) by means other than the usual network connection. Examples
47 include accessing a remote server via a physical serial console or via a
48 virtual console. IPMI is also considered OOB access.
51 A data structure encapsulating a basic cluster operation; for example: start
52 instance, add instance, etc.
55 (Xen) *Para-virtualization mode*. In this mode, the virtual machine is aware
56 that it is virtualized; therefore, there is no need for hardware emulation
60 *State of Record*. Refers to values/properties that come from an
61 authoritative configuration source. For example, the maximum VCPU over-
62 subscription ratio is a SoR value, but the current over-subscription ratio
63 (based upon how many instances live on the node) is a :term:`SoW` value.
66 *State of the World*. Refers to values that directly describe the world, as
67 opposed to values that come from the configuration (which are considered
71 Xen Transcendent Memory (http://en.wikipedia.org/wiki/Transcendent_memory).
72 tmem is a mechanism used by Xen to provide memory over-subscription.
75 :command:`ganeti-watcher` is a tool that should be run regularly from
76 cron. The tool executes tasks such as restarting failed instances and
77 restarting secondary DRBD devices. For more details, see the man page
78 :manpage:`ganeti-watcher(8)`.
81 .. vim: set textwidth=72 :