// ================================================================== // Title: Metrics MOF Specification 2.8, Base Metrics // Author: DMTF Application Working Group // Filename: Metric28_BaseMetric.MOF // Version 2.8 // Status: Final // Date: Jan 26, 2004 // =================================================================== // Copyright 1999-2003 Distributed Management Task Force, Inc. (DMTF). // All rights reserved. // DMTF is a not-for-profit association of industry members dedicated // to promoting enterprise and systems management and interoperability. // DMTF specifications and documents may be reproduced for uses // consistent with this purpose by members and non-members, // provided that correct attribution is given. // As DMTF specifications may be revised from time to time, // the particular version and release date should always be noted. // // Implementation of certain elements of this standard or proposed // standard may be subject to third party patent rights, including // provisional patent rights (herein "patent rights"). DMTF makes // no representations to users of the standard as to the existence // of such rights, and is not responsible to recognize, disclose, or // identify any or all such third party patent right, owners or // claimants, nor for any incomplete or inaccurate identification or // disclosure of such rights, owners or claimants. DMTF shall have no // liability to any party, in any manner or circumstance, under any // legal theory whatsoever, for failure to recognize, disclose, or // identify any such third party patent rights, or for such party's // reliance on the standard or incorporation thereof in its product, // protocols or testing procedures. DMTF shall have no liability to // any party implementing such standard, whether such implementation // is foreseeable or not, nor to any patent owner or claimant, and shall // have no liability or responsibility for costs or losses incurred if // a standard is withdrawn or modified after publication, and shall be // indemnified and held harmless by any party implementing the // standard from any and all claims of infringement by a patent owner // for such implementations. // // For information about patents held by third-parties which have // notified the DMTF that, in their opinion, such patent may relate to // or impact implementations of DMTF standards, visit // http://www.dmtf.org/about/policies/disclosures.php. // =================================================================== // Description: // Additions to the V2.6 Metrics MOF to support a more generic // approach. // // CIM users often desire metric objects that model designers have // not // provided. Furthermore, such needs vary from one management // philosophy // to another. Rather than fill more and more CIM models with // standardized objects, the Metrics model supports externally // defined // expressions of existing objects, such as properties of // CIM_StatisticalData and its subclasses. In addition, the // classes described in this file enable users to define their own // metrics at runtime (rather than at provider implementation time). // A newly defined metric (aka CIM_BaseMetricDefinition) may be // given a value by instantiating CIM_BaseMetricValue. // Both CIM_BaseMetricDefinitions and CIM_BaseMetricValues may be // associated with a ManagedElement. // ================================================================== // CIM 2.8 (Final) - None // CIM 2.8 (Preliminary) - None // // CIM 2.7.0 (Preliminary) 5 June 2002 // CR820 - Defined Base Metrics Classes and associations // CR851 - Change the Description of BaseMetricValue.Duration // to define the timestamp as the end of the duration // CIM 2.7.0 (Final) 17 March 2003 // CR987 - Remove experimental qualifier from: // -CIM_BaseMetricDefinition // -CIM_BaseMetricValue // -CIM_MetricInstance // -CIM_MetricDefForME // -CIM_MetricForME // ================================================================== #pragma Locale ("en_US") // ================================================================== // BaseMetricDefinition // ================================================================== [Version ( "2.7.0" ), Description ( "CIM_BaseMetricDefinition represents the definitional aspects " "of a metric, i.e., a definition template containing meta data " "about a new metric. Since CIM_BaseMetricDefinition does not " "capture metric instance information, it does not contain the " "value of the metric. The associated class CIM_BaseMetricValue " "holds the metric value and encapsulates its runtime behavior. " "The purpose of CIM_BaseMetricDefinition is to provide a " "convenient mechanism for introducing a new metric definition " "at runtime and capturing its instance values in a separate " "class. This mechanism is targeted specifically at CIM users " "who would like to enhance existing CIM schemas by introducing " "domain-specific metrics that are not captured in the existing " "CIM schemas. In addition, vendors of managed resources may " "make use of this mechanism if a small subset of a potentially " "large and heterogeneous amount of performance-related data " "needs to be exposed, based on the context in which the data is " "captured. Additional meta data for a metric can be provided by " "subclassing from CIM_BaseMetricDefinition. The " "CIM_BaseMetricDefinition should be associated with the " "CIM_ManagedElement(s) to which it applies.")] class CIM_BaseMetricDefinition : CIM_ManagedElement { [Key, Description ( "A string that uniquely identifies the metric definition. " "The use of OSF UUID/GUIDs is recommended.")] string Id; [Description ( "The name of the metric. This name does not have to be " "unique, but should be descriptive and may contain blanks.")] string Name; [Description ( "The data type of the metric. For example, \"boolean\" " "(value=1) or \"datetime\" (=3) may be specified. These " "types represent the datatypes defined for CIM."), ValueMap { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14" }, Values { "boolean", "char16", "datetime", "real32", "real64", "sint16", "sint32", "sint64", "sint8", "string", "uint16", "uint32", "uint64", "uint8" }] uint16 DataType; [Description ( "An enumerated value that describes the characteristics of " "the metric, for purposes of performing calculations. The " "property can take one of the following values: \n" "1=\"Non-calculable\" -> a string. Arithmetic makes no " "sense. \n" "2=\"Summable\" -> It is reasonable to sum this value over " "many instances of e.g., UnitOfWork, such as the number of " "files processed in a backup job. For example, if each " "backup job is a UnitOfWork, and each job backs up 27,000 " "files on average, then it makes sense to say that 100 " "backup jobs processed 2,700,000 files. \n" "3=\"Non-summable\" -> It does not make sense to sum this " "value over many instances of UnitOfWork. An example would " "be a metric that measures the queue length when a job " "arrives at a server. If each job is a UnitOfWork, and the " "average queue length when each job arrives is 33, it does " "not make sense to say that the queue length for 100 jobs is " "3300. It does make sense to say that the mean is 33."), ValueMap { "1", "2", "3" }, Values { "Non-calculable", "Summable", "Non-summable" }] uint16 Calculable; [Description ( "Identifies the specific units of a value. Examples are " "Bytes, Packets, Jobs, Files, Milliseconds, and Amps.")] string Units; [Description ( "Defines one or more strings that can be used to refine " "(break down) queries against the BaseMetricValues along a " "certain dimension. An example is a transaction name, " "allowing the break down of the total value for all " "transactions into a set of values, one for each transaction " "name. Other examples might be application system or user " "group name. The strings are free format and should be " "meaningful to the end users of the metric data. The strings " "indicate which break down dimensions are supported for this " "metric definition, by the underlying instrumentation.")] string BreakdownDimensions[]; }; // ================================================================== // BaseMetricValue // ================================================================== [Version ( "2.7.0" ), Description ( "Each CIM_BaseMetricValue object represents the instance value " "of a metric. Since the gathering of metric information can " "involve large quantities of information there may be many " "instances of this class. The use of this class as an " "instrumentation source may be inefficient unless the rate of " "metrics are known. The length of time a CIM_BaseMetricValue " "instance exists after the metric information is captured is " "not defined and is implementation dependent. \n" "Most metric data values change over time. There are two ways " "of mapping this into CIM_BaseMetricValue objects: The value " "for the next point in time may use the same object and just " "change its properties (such as the value or timestamp), or the " "existing objects remain unchanged and a new object is created " "for the new point in time. The first method is typically used " "for snapshot data and the second method for historical data. " "Which method is used, is indicated by the Volatile property.")] class CIM_BaseMetricValue : CIM_ManagedElement { [Key, Description ( "A unique identifier of this instance of the metric value. " "This must be a globally unique identifier.")] string InstanceId; [Required, Description ( "The key of the BaseMetricDefinition instance for this " "CIM_BaseMetricValue instance value."), ModelCorrespondence { "CIM_BaseMetricDefinition.Id" }] string MetricDefinitionId; [Description ( "A descriptive name for the element to which the metric " "value belongs (i.e., the measured element). This property " "is required by behavior if there is no association defined " "to a ManagedElement, but may be used in other cases to " "provide supplemental information. This allows metrics to be " "captured independently of any ManagedElement. An example is " "where a metric value belongs to a combination of elements, " "such as the input and output ports of the traffic in a " "switch. If there are multiple ManagedElements associated " "with the metric value, then usually there is one that " "naturally belongs to the metric value and that one should " "be used to create the supplemental information. The " "property is not meant to be used as a foreign key to search " "on the measured element. Instead, the association to the " "ManagedElement should be used.")] string MeasuredElementName; [Description ( "Identifies the time when the value of a metric instance is " "computed. Note that this is different from the time when " "the instance is created. For a given CIM_BaseMetricValue " "instance, the TimeStamp changes whenever a new measurement " "snapshot is taken if Volatile is true. A managmenet " "application may establish a time series of metric data by " "retrieving the instances of CIM_BaseMetricValue and sorting " "them according to their TimeStamp.")] datetime TimeStamp; [Description ( "Property that represents the time duration over which this " "metric value is valid. This property should not exist for " "timestamps that apply only to a point in time but should be " "defined for values that are considered valid for a certain " "time period (ex. sampling). If the \"Duration\" property " "exists and is nonNull, the TimeStamp is to be considered " "the end of the interval.")] datetime Duration; [Required, Description ( "The value of the metric represented as a string. Its " "original data type is specified in " "CIM_BaseMetricDefinition.")] string MetricValue; [Description ( "If present, specifies one BreakdownDimension from the " "BreakdownDimensions array defined in the associated CIM_ " "BaseMetricDefinition. This is the dimension along which " "this set of metric values is broken down. For a description " "of the concept, see the class CIM_BaseMetricDefinition.")] string BreakdownDimension; [Description ( "Defines a value of the BreakdownDimension property defined " "for this metric value instance. For instance, if the " "BreakdownDimension is \"TransactionName\", this property " "could name the actual transaction to which this particular " "metric value applies.")] string BreakdownValue; [Description ( "If true, Volatile indicates that the value for the next " "point in time may use the same object and just change its " "properties (such as the value or timestamp). If false, the " "existing objects remain unchanged and a new object is " "created for the new point in time.")] boolean Volatile; }; // =================================================================== // MetricInstance // =================================================================== [Association, Version ( "2.7.0" ), Description ( "Weak association of metric value objects with their metric " "definition. This association ties an instance of " "CIM_BaseMetricValue to its CIM_BaseMetricDefinition; it is " "weak because the existence of a CIM_BaseMetricValue depends on " "the existence of its associated CIM_BaseMetricDefinition: An " "instance of CIM_BaseMetricValue must not exist without being " "associated to its corresponding CIM_BaseMetricDefinition.")] class CIM_MetricInstance : CIM_Dependency { [Override ( "Antecedent" ), Min ( 1 ), Max ( 1 ), Description ( "The CIM_BaseMetricDefinition for this particular " "CIM_BaseMetricValue.")] CIM_BaseMetricDefinition REF Antecedent; [Override ( "Dependent" ), Description ( "A CIM_BaseMetricValue instance holding the Value.")] CIM_BaseMetricValue REF Dependent; }; // =================================================================== // MetricDefForME // =================================================================== [Association, Version ( "2.7.0" ), Description ( "This association ties a CIM_BaseMetricDefinition to a " "CIM_ManagedElement to define metrics for the latter. The " "metrics definition is given context by the ManagedElement, " "which is why the definition is dependent on the element.")] class CIM_MetricDefForME : CIM_Dependency { [Override ( "Antecedent" ), Description ( "The CIM_ManagedElement that can have metrics of this type " "associated with it.")] CIM_ManagedElement REF Antecedent; [Override ( "Dependent" ), Description ( "A CIM_BaseMetricDefinition for a CIM_ManagedElement.")] CIM_BaseMetricDefinition REF Dependent; }; // =================================================================== // MetricForME // =================================================================== [Association, Version ( "2.7.0" ), Description ( "This association links a ManagedElement to the metric values " "being maintained for it.")] class CIM_MetricForME : CIM_Dependency { [Override ( "Antecedent" ), Description ( "ManagedElement to which the metric values belong.")] CIM_ManagedElement REF Antecedent; [Override ( "Dependent" ), Description ( "A metric value for the ManagedElement.")] CIM_BaseMetricValue REF Dependent; }; // ================================================================== // end of file // ==================================================================