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[role="xpack"]
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[[ml-job-resource]]
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=== Job Resources
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A job resource has the following properties:
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`analysis_config`::
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(object) The analysis configuration, which specifies how to analyze the data.
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See <<ml-analysisconfig, analysis configuration objects>>.
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`analysis_limits`::
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(object) Defines approximate limits on the memory resource requirements for the job.
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See <<ml-apilimits,analysis limits>>.
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`background_persist_interval`::
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(time units) Advanced configuration option.
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The time between each periodic persistence of the model.
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The default value is a randomized value between 3 to 4 hours, which avoids
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all jobs persisting at exactly the same time. The smallest allowed value is
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1 hour.
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+
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--
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TIP: For very large models (several GB), persistence could take 10-20 minutes,
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so do not set the `background_persist_interval` value too low.
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2017-08-02 11:25:46 -04:00
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--
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`create_time`::
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(string) The time the job was created. For example, `1491007356077`.
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`data_description`::
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(object) Describes the data format and how APIs parse timestamp fields.
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See <<ml-datadescription,data description objects>>.
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`description`::
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(string) An optional description of the job.
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`finished_time`::
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(string) If the job closed or failed, this is the time the job finished,
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otherwise it is `null`.
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2017-08-17 15:52:29 -04:00
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`groups`::
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(array of strings) A list of job groups. A job can belong to no groups or
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many. For example, `["group1", "group2"]`.
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`job_id`::
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(string) The unique identifier for the job.
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`job_type`::
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(string) Reserved for future use, currently set to `anomaly_detector`.
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`model_plot_config`::
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(object) Configuration properties for storing additional model information.
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See <<ml-apimodelplotconfig, model plot configuration>>.
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`model_snapshot_id`::
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(string) A numerical character string that uniquely identifies the model
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snapshot. For example, `1491007364`.
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For more information about model snapshots, see <<ml-snapshot-resource>>.
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`model_snapshot_retention_days`::
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(long) The time in days that model snapshots are retained for the job.
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Older snapshots are deleted. The default value is 1 day.
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2017-04-24 12:31:31 -04:00
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`renormalization_window_days`::
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(long) Advanced configuration option.
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The period over which adjustments to the score are applied, as new data is seen.
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The default value is the longer of 30 days or 100 `bucket_spans`.
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`results_index_name`::
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(string) The name of the index in which to store the {ml} results.
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The default value is `shared`,
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which corresponds to the index name `.ml-anomalies-shared`
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`results_retention_days`::
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(long) Advanced configuration option.
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The number of days for which job results are retained.
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Once per day at 00:30 (server time), results older than this period are
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deleted from Elasticsearch. The default value is null, which means results
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are retained.
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[[ml-analysisconfig]]
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==== Analysis Configuration Objects
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An analysis configuration object has the following properties:
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`bucket_span`::
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(time units) The size of the interval that the analysis is aggregated into,
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typically between `5m` and `1h`. The default value is `5m`.
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`categorization_field_name`::
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(string) If this property is specified, the values of the specified field will
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be categorized. The resulting categories must be used in a detector by setting
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`by_field_name`, `over_field_name`, or `partition_field_name` to the keyword
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`mlcategory`. For more information, see
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{xpack-ref}/ml-configuring-categories.html[Categorizing Log Messages].
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//<<ml-configuring-categories>>.
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`categorization_filters`::
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(array of strings) If `categorization_field_name` is specified,
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you can also define optional filters. This property expects an array of
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regular expressions. The expressions are used to filter out matching sequences
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off the categorization field values. This functionality is useful to fine tune
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categorization by excluding sequences that should not be taken into
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consideration for defining categories. For example, you can exclude SQL
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statements that appear in your log files. For more information, see
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{xpack-ref}/ml-configuring-categories.html[Categorizing Log Messages].
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//<<ml-configuring-categories>>.
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`detectors`::
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(array) An array of detector configuration objects,
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which describe the anomaly detectors that are used in the job.
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See <<ml-detectorconfig,detector configuration objects>>. +
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+
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--
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NOTE: If the `detectors` array does not contain at least one detector,
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no analysis can occur and an error is returned.
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--
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`influencers`::
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(array of strings) A comma separated list of influencer field names.
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Typically these can be the by, over, or partition fields that are used in the
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detector configuration. You might also want to use a field name that is not
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specifically named in a detector, but is available as part of the input data.
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When you use multiple detectors, the use of influencers is recommended as it
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aggregates results for each influencer entity.
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`latency`::
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(time units) The size of the window in which to expect data that is out of
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time order. The default value is 0 (no latency). If you specify a non-zero
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value, it must be greater than or equal to one second. For more information
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about time units, see
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{ref}/common-options.html#time-units[Time Units].
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+
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--
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NOTE: Latency is only applicable when you send data by using
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the <<ml-post-data,post data>> API.
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2017-08-02 11:25:46 -04:00
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--
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`multivariate_by_fields`::
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(boolean) This functionality is reserved for internal use. It is not supported
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for use in customer environments and is not subject to the support SLA of
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official GA features.
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+
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--
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If set to `true`, the analysis will automatically find correlations
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between metrics for a given `by` field value and report anomalies when those
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correlations cease to hold. For example, suppose CPU and memory usage on host A
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is usually highly correlated with the same metrics on host B. Perhaps this
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correlation occurs because they are running a load-balanced application.
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If you enable this property, then anomalies will be reported when, for example,
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CPU usage on host A is high and the value of CPU usage on host B is low.
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That is to say, you'll see an anomaly when the CPU of host A is unusual given
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the CPU of host B.
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2017-04-19 16:31:07 -04:00
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NOTE: To use the `multivariate_by_fields` property, you must also specify
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`by_field_name` in your detector.
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2017-08-02 11:25:46 -04:00
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--
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`summary_count_field_name`::
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(string) If this property is specified, the data that is fed to the job is
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expected to be pre-summarized. This property value is the name of the field
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that contains the count of raw data points that have been summarized. The same
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`summary_count_field_name` applies to all detectors in the job.
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+
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--
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2017-04-24 13:46:17 -04:00
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NOTE: The `summary_count_field_name` property cannot be used with the `metric`
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function.
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2017-08-02 11:25:46 -04:00
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--
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2017-04-19 16:31:07 -04:00
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////
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LEAVE UNDOCUMENTED
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`overlapping_buckets`::
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(boolean) If set to `true`, an additional analysis occurs that runs out of phase by half a bucket length.
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This requires more system resources and enhances detection of anomalies that span bucket boundaries.
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`use_per_partition_normalization`::
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() TBD
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////
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2017-04-19 16:31:07 -04:00
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[float]
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[[ml-detectorconfig]]
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==== Detector Configuration Objects
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Detector configuration objects specify which data fields a job analyzes.
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They also specify which analytical functions are used.
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You can specify multiple detectors for a job.
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Each detector has the following properties:
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`by_field_name`::
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(string) The field used to split the data.
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In particular, this property is used for analyzing the splits with respect to their own history.
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It is used for finding unusual values in the context of the split.
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`detector_description`::
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(string) A description of the detector. For example, `Low event rate`.
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`exclude_frequent`::
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(string) Contains one of the following values: `all`, `none`, `by`, or `over`.
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If set, frequent entities are excluded from influencing the anomaly results.
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Entities can be considered frequent over time or frequent in a population.
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If you are working with both over and by fields, then you can set `exclude_frequent`
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to `all` for both fields, or to `by` or `over` for those specific fields.
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`field_name`::
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(string) The field that the detector uses in the function. If you use an event rate
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function such as `count` or `rare`, do not specify this field. +
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2017-08-02 11:25:46 -04:00
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+
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--
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NOTE: The `field_name` cannot contain double quotes or backslashes.
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2017-08-02 11:25:46 -04:00
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--
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`function`::
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(string) The analysis function that is used.
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For example, `count`, `rare`, `mean`, `min`, `max`, and `sum`. For more
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information, see {xpack-ref}/ml-functions.html[Function Reference].
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//<<ml-functions>>.
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`over_field_name`::
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(string) The field used to split the data.
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2017-06-23 14:10:46 -04:00
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In particular, this property is used for analyzing the splits with respect to
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the history of all splits. It is used for finding unusual values in the
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population of all splits. For more information, see
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{xpack-ref}/ml-configuring-pop.html[Performing Population Analysis].
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`partition_field_name`::
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(string) The field used to segment the analysis.
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When you use this property, you have completely independent baselines for each value of this field.
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`use_null`::
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(boolean) Defines whether a new series is used as the null series
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when there is no value for the by or partition fields. The default value is `false`. +
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2017-08-02 11:25:46 -04:00
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+
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--
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2017-04-19 16:31:07 -04:00
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IMPORTANT: Field names are case sensitive, for example a field named 'Bytes'
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is different from one named 'bytes'.
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2017-08-02 11:25:46 -04:00
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--
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2017-04-19 16:31:07 -04:00
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////
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LEAVE UNDOCUMENTED
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`detector_rules`::
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(array) TBD
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////
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2017-06-02 05:26:01 -04:00
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`detector_index`::
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(integer) Unique ID for the detector, used when updating it.
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Based on the order of detectors within the `analysis_config`, starting at zero.
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2017-04-19 16:31:07 -04:00
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[float]
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2017-04-04 18:26:39 -04:00
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[[ml-datadescription]]
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2017-06-06 16:42:47 -04:00
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==== Data Description Objects
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2017-04-04 18:26:39 -04:00
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2017-04-19 16:31:07 -04:00
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The data description defines the format of the input data when you send data to
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the job by using the <<ml-post-data,post data>> API. Note that when configure
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a {dfeed}, these properties are automatically set.
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2017-04-19 16:31:07 -04:00
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When data is received via the <<ml-post-data,post data>> API, it is not stored
|
2017-05-02 15:45:42 -04:00
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in {es}. Only the results for anomaly detection are retained.
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A data description object has the following properties:
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`format`::
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(string) Only `JSON` format is supported at this time.
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`time_field`::
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(string) The name of the field that contains the timestamp.
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The default value is `time`.
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`time_format`::
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(string) The time format, which can be `epoch`, `epoch_ms`, or a custom pattern.
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The default value is `epoch`, which refers to UNIX or Epoch time (the number of seconds
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since 1 Jan 1970).
|
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The value `epoch_ms` indicates that time is measured in milliseconds since the epoch.
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The `epoch` and `epoch_ms` time formats accept either integer or real values. +
|
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+
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|
--
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NOTE: Custom patterns must conform to the Java `DateTimeFormatter` class.
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When you use date-time formatting patterns, it is recommended that you provide
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the full date, time and time zone. For example: `yyyy-MM-dd'T'HH:mm:ssX`.
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If the pattern that you specify is not sufficient to produce a complete timestamp,
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job creation fails.
|
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|
2017-08-02 11:25:46 -04:00
|
|
|
--
|
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|
[float]
|
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|
[[ml-apilimits]]
|
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|
==== Analysis Limits
|
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|
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Limits can be applied for the resources required to hold the mathematical models in memory.
|
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|
These limits are approximate and can be set per job. They do not control the
|
|
|
|
memory used by other processes, for example the Elasticsearch Java processes.
|
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|
|
If necessary, you can increase the limits after the job is created.
|
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|
|
|
|
|
|
|
The `analysis_limits` object has the following properties:
|
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|
|
|
|
|
|
`categorization_examples_limit`::
|
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|
|
|
(long) The maximum number of examples stored per category in memory and
|
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|
|
|
in the results data store. The default value is 4. If you increase this value,
|
|
|
|
more examples are available, however it requires that you have more storage available.
|
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|
|
|
If you set this value to `0`, no examples are stored. +
|
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|
|
|
+
|
|
|
|
--
|
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|
|
|
NOTE: The `categorization_examples_limit` only applies to analysis that uses categorization.
|
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|
|
|
For more information, see
|
|
|
|
{xpack-ref}/ml-configuring-categories.html[Categorizing Log Messages].
|
|
|
|
|
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|
|
|
--
|
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|
|
|
|
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|
|
|
`model_memory_limit`::
|
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|
|
|
(long or string) The approximate maximum amount of memory resources that are
|
|
|
|
required for analytical processing. Once this limit is approached, data pruning
|
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|
|
|
becomes more aggressive. Upon exceeding this limit, new entities are not
|
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|
|
|
modeled. The default value is `4096mb`. If you specify a number instead of a
|
|
|
|
string, the units are assumed to be MiB. Specifying a string is recommended
|
|
|
|
for clarity. If you specify a byte size unit of `b` or `kb` and the number
|
|
|
|
does not equate to a discrete number of megabytes, it is rounded down to the
|
|
|
|
closest MiB. The minimum valid value is 1 MiB. If you specify a value less
|
|
|
|
than 1 MiB, an error occurs. For more information about supported byte size
|
|
|
|
units, see
|
|
|
|
{ref}/common-options.html#byte-units[Byte size units].
|
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|
|
|
|
2017-04-19 16:31:07 -04:00
|
|
|
[float]
|
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|
|
|
[[ml-apimodelplotconfig]]
|
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|
|
|
==== Model Plot Config
|
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|
|
|
|
2017-04-19 16:31:07 -04:00
|
|
|
This advanced configuration option stores model information along with the
|
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|
|
|
results. It provides a more detailed view into anomaly detection.
|
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|
|
|
|
2017-07-10 11:50:38 -04:00
|
|
|
WARNING: If you enable model plot it can add considerable overhead to the performance
|
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|
|
|
of the system; it is not feasible for jobs with many entities.
|
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|
|
|
|
2017-04-19 16:31:07 -04:00
|
|
|
Model plot provides a simplified and indicative view of the model and its bounds.
|
|
|
|
It does not display complex features such as multivariate correlations or multimodal data.
|
|
|
|
As such, anomalies may occasionally be reported which cannot be seen in the model plot.
|
2017-04-19 13:52:30 -04:00
|
|
|
|
2017-07-10 11:50:38 -04:00
|
|
|
Model plot config can be configured when the job is created or updated later. It must be
|
2017-06-28 10:32:32 -04:00
|
|
|
disabled if performance issues are experienced.
|
2017-04-19 13:52:30 -04:00
|
|
|
|
|
|
|
The `model_plot_config` object has the following properties:
|
|
|
|
|
|
|
|
`enabled`::
|
2017-04-19 16:31:07 -04:00
|
|
|
(boolean) If true, enables calculation and storage of the model bounds for
|
|
|
|
each entity that is being analyzed. By default, this is not enabled.
|
2017-04-19 13:52:30 -04:00
|
|
|
|
|
|
|
`terms`::
|
2017-07-10 11:50:38 -04:00
|
|
|
(string) Limits data collection to this comma separated list of partition or by field values.
|
|
|
|
If terms are not specified or it is an empty string, no filtering is applied.
|
2017-06-28 10:32:32 -04:00
|
|
|
For example, "CPU,NetworkIn,DiskWrites". This is experimental. Only the specified `terms` can
|
|
|
|
be viewed when using the Single Metric Viewer.
|