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.

See ‘aws help’ for descriptions of global parameters.

Examples¶

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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