get-sampling-targets¶

Description¶

Requests a sampling quota for rules that the service is using to sample requests.

Synopsis¶

  get-sampling-targets
--sampling-statistics-documents <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options¶

--sampling-statistics-documents (list)

Information about rules that the service is using to sample requests.

(structure)

Request sampling results for a single rule from a service. Results are for the last 10 seconds unless the service has been assigned a longer reporting interval after a previous call to GetSamplingTargets .

RuleName -> (string)

The name of the sampling rule.

ClientID -> (string)

A unique identifier for the service in hexadecimal.

Timestamp -> (timestamp)

The current time.

RequestCount -> (integer)

The number of requests that matched the rule.

SampledCount -> (integer)

The number of requests recorded.

BorrowCount -> (integer)

The number of requests recorded with borrowed reservoir quota.

Shorthand Syntax:

RuleName=string,ClientID=string,Timestamp=timestamp,RequestCount=integer,SampledCount=integer,BorrowCount=integer ...

JSON Syntax:

[
  {
    "RuleName": "string",
    "ClientID": "string",
    "Timestamp": timestamp,
    "RequestCount": integer,
    "SampledCount": integer,
    "BorrowCount": integer
  }
  ...
]

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.

See ‘aws help’ for descriptions of global parameters.

Examples¶

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To request a sampling quota

The following get-sampling-targets example requests a sampling quota for rules that the service is using to sample requests. The response from AWS X-Ray includes a quota that can be used instead of borrowing from the reservoir.

aws xray get-sampling-targets \
    --sampling-statistics-documents '[ { "RuleName": "base-scorekeep", "ClientID": "ABCDEF1234567890ABCDEF10", "Timestamp": "2018-07-07T00:20:06, "RequestCount": 110, "SampledCount": 20, "BorrowCount": 10 }, { "RuleName": "polling-scorekeep", 31, "BorrowCount": 0 } ]'

Output:

{
    "SamplingTargetDocuments": [
        {
            "RuleName": "base-scorekeep",
            "FixedRate": 0.1,
            "ReservoirQuota": 2,
            "ReservoirQuotaTTL": 1530923107.0,
            "Interval": 10
        },
        {
            "RuleName": "polling-scorekeep",
            "FixedRate": 0.003,
            "ReservoirQuota": 0,
            "ReservoirQuotaTTL": 1530923107.0,
            "Interval": 10
        }
    ],
    "LastRuleModification": 1530920505.0,
    "UnprocessedStatistics": []
}

For more information, see Using Sampling Rules with the X-Ray API in the AWS X-Ray Developer Guide.

Output¶

SamplingTargetDocuments -> (list)

Updated rules that the service should use to sample requests.

(structure)

Temporary changes to a sampling rule configuration. To meet the global sampling target for a rule, X-Ray calculates a new reservoir for each service based on the recent sampling results of all services that called GetSamplingTargets .

RuleName -> (string)

The name of the sampling rule.

FixedRate -> (double)

The percentage of matching requests to instrument, after the reservoir is exhausted.

ReservoirQuota -> (integer)

The number of requests per second that X-Ray allocated for this service.

ReservoirQuotaTTL -> (timestamp)

When the reservoir quota expires.

Interval -> (integer)

The number of seconds for the service to wait before getting sampling targets again.

LastRuleModification -> (timestamp)

The last time a user changed the sampling rule configuration. If the sampling rule configuration changed since the service last retrieved it, the service should call GetSamplingRules to get the latest version.

UnprocessedStatistics -> (list)

Information about SamplingStatisticsDocument that X-Ray could not process.

(structure)

Sampling statistics from a call to GetSamplingTargets that X-Ray could not process.

RuleName -> (string)

The name of the sampling rule.

ErrorCode -> (string)

The error code.

Message -> (string)

The error message.

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