136 lines
3.8 KiB
Plaintext
136 lines
3.8 KiB
Plaintext
Desc: NUT Powersaving features and using outlet collection
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File: powersaving.txt
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Date: 14 June 2003
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Auth: Arnaud Quette <arnaud.quette@free.fr>
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This document introduces NUT PowerSaving features, and Smart
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Outlet Management using Network UPS Tools.
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This feature is sponsored by MGE UPS SYSTEMS.
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Introduction
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------------
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This feature, which is supported by various manufacturers,
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under various names, allows to manage separately the outlets
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of an UPS, or a Power Distrubition Unit (PDU). This allows to
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program a limited backup time to non-critical loads in order
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to keep the maximum of the battery reserve for critical
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equipment. This also allows a remote electrical management of
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devices, which is very useful in DataCenters for example.
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On small setup, you can plug printers, hubs, (...) on
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PowerSave'd outlets. During a power outage, the UPS will
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turn off those after X minutes of back-up time (or when
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passing below X % of battery charge) depending on your
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UPS model and settings. This will ensure that all
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remaining battery power is available for the computer.
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On huger setup (with a huger UPS), this is about the
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same with the ability to (power and) control servers in
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a smart way (need to notify those to shutdown first !).
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Manufacturers Powersaving technologies presentation
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===================================================
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1) MGE UPS SYSTEMS and MGE Office Protection Systems
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----------------------------------------------------
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This feature is called "PowerShare" and is available
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on lots of models, with different behaviours.
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Features will vary according to your exact model.
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For example:
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- on Pulsar Ellipse Premium 650/800/1200, you can
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only set a low battery level which triggers a power
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off of the PowerShare outlet(s).
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Check http://www.mgeups.com/products/pdt230/smallups/ellipsep/ellipsep1.htm
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- on Pulsar Evolution (all models), you can either
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do the same as above, or set a timer to shutdown
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the outlet when expired. This latter needs to be
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used in conjonction with upsmon/upssched to act
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upon a power outage, and cancel the timer when
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the power is back...
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2) Eaton | Powerware ePDU
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Depending on the exact model, you can see various measurements
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(like current, voltage, power, ...) of the various outlets. You may
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also have the hability to start, stop and cycle these.
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For more information: http://www.epdu.com
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3) Other manufacturers (Belkin, ...)
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To be completed...
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Integration into the new NUT naming scheme
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==========================================
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Have a look at new-names.txt, "outlet" section.
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Note on outlet collection usage
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===============================
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1) outlet.{id, desc, ...} represents the
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whole outlets (includes all outlet.x.*),
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also called Main Outlet.
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An interesting fact is that _ALL_ models
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have at least that outlet, which is always
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considered as the UPS itself. Some values
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from the "ups" collection are linked to
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the outlet.*, ie:
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- outlet.load is mapped from ups.load
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- outlet.delay.* is mapped from ups.delay.*
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2) Indexes for other outlets begin by 1. So
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the first outlet is "outlet.1.*".
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Examples of upsc tree
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=====================
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1) Here is an MGE Evolution tree with the
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main and 2 outlets.
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...
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outlet.desc: Main Outlet
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outlet.id: 0
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outlet.switchable: 0
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outlet.1.autoswitch.charge.low: 0
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outlet.1.delay.shutdown: -1
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outlet.1.delay.start: -1
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outlet.1.desc: PowerShare Outlet 1
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outlet.1.id: 1
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outlet.1.switch: 1
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outlet.1.switchable: 1
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outlet.2.autoswitch.charge.low: 0
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outlet.2.delay.shutdown: -1
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outlet.2.delay.start: -1
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outlet.2.desc: PowerShare Outlet 2
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outlet.2.id: 2
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outlet.2.switch: 1
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outlet.2.switchable: 1
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...
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2) Here is another MGE Ellipse Premium
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tree with the main and 1 PowerSaving
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outlets.
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...
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outlet.desc: Main Outlet
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outlet.id: 0
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outlet.switchable: 0
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outlet.1.autoswitch.charge.low: 0
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outlet.1.desc: PowerShare Outlet 1
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outlet.1.id: 1
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outlet.1.switch: 1
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outlet.1.switchable: 1
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...
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