AWS CLI Command Reference

[ aws . dms ]

start-replication-task-assessment

Description

Starts the replication task assessment for unsupported data types in the source database.

You can only use this operation for a task if the following conditions are true:

  • The task must be in the stopped state.

  • The task must have successful connections to the source and target.

If either of these conditions are not met, an InvalidResourceStateFault error will result.

For information about DMS task assessments, see Creating a task assessment report in the Database Migration Service User Guide .

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  start-replication-task-assessment
--replication-task-arn <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--replication-task-arn (string)

The Amazon Resource Name (ARN) of the replication task.

--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 start a task assessment

The following start-replication-task-assessment example starts a replication task assessment.

aws dms start-replication-task-assessment \
    --replication-task-arn arn:aws:dms:us-east-1:123456789012:task:K55IUCGBASJS5VHZJIINA45FII

Output:

{
    "ReplicationTask": {
        "ReplicationTaskIdentifier": "moveit2",
        "SourceEndpointArn": "arn:aws:dms:us-east-1:123456789012:endpoint:6GGI6YPWWGAYUVLKIB732KEVWA",
        "TargetEndpointArn": "arn:aws:dms:us-east-1:123456789012:endpoint:EOM4SFKCZEYHZBFGAGZT3QEC5U",
        "ReplicationInstanceArn": "arn:aws:dms:us-east-1:123456789012:rep:T3OM7OUB5NM2LCVZF7JPGJRNUE",
        "MigrationType": "full-load",
        "TableMappings": ...output omitted...,
        "ReplicationTaskSettings": ...output omitted...,
        "Status": "testing",
        "StopReason": "Stop Reason FULL_LOAD_ONLY_FINISHED",
        "ReplicationTaskCreationDate": 1590524772.505,
        "ReplicationTaskStartDate": 1590789988.677,
        "ReplicationTaskArn": "arn:aws:dms:us-east-1:123456789012:task:K55IUCGBASJS5VHZJIINA45FII"
    }
}

For more information, see Creating a Task Assessment Report in the AWS Database Migration Service User Guide.

Output

ReplicationTask -> (structure)

The assessed replication task.

ReplicationTaskIdentifier -> (string)

The user-assigned replication task identifier or name.

Constraints:

  • Must contain 1-255 alphanumeric characters or hyphens.

  • First character must be a letter.

  • Cannot end with a hyphen or contain two consecutive hyphens.

SourceEndpointArn -> (string)

The Amazon Resource Name (ARN) that uniquely identifies the endpoint.

TargetEndpointArn -> (string)

The ARN that uniquely identifies the endpoint.

ReplicationInstanceArn -> (string)

The ARN of the replication instance.

MigrationType -> (string)

The type of migration.

TableMappings -> (string)

Table mappings specified in the task.

ReplicationTaskSettings -> (string)

The settings for the replication task.

Status -> (string)

The status of the replication task. This response parameter can return one of the following values:

Note

` StartReplicationTaskAssessmentRun https://docs.aws.amazon.com/dms/latest/APIReference/API_StartReplicationTaskAssessmentRun.html`__ is an improved premigration task assessment operation. The ` StartReplicationTaskAssessment https://docs.aws.amazon.com/dms/latest/APIReference/API_StartReplicationTaskAssessment.html`__ operation assesses data type compatibility only between the source and target database of a given migration task. In contrast, ` StartReplicationTaskAssessmentRun https://docs.aws.amazon.com/dms/latest/APIReference/API_StartReplicationTaskAssessmentRun.html`__ enables you to specify a variety of premigration task assessments in addition to data type compatibility. These assessments include ones for the validity of primary key definitions and likely issues with database migration performance, among others.

LastFailureMessage -> (string)

The last error (failure) message generated for the replication task.

StopReason -> (string)

The reason the replication task was stopped. This response parameter can return one of the following values:

  • "STOP_REASON_FULL_LOAD_COMPLETED" – Full-load migration completed.

  • "STOP_REASON_CACHED_CHANGES_APPLIED" – Change data capture (CDC) load completed.

  • "STOP_REASON_CACHED_CHANGES_NOT_APPLIED" – In a full-load and CDC migration, the full load stopped as specified before starting the CDC migration.

  • "STOP_REASON_SERVER_TIME" – The migration stopped at the specified server time.

ReplicationTaskCreationDate -> (timestamp)

The date the replication task was created.

ReplicationTaskStartDate -> (timestamp)

The date the replication task is scheduled to start.

CdcStartPosition -> (string)

Indicates when you want a change data capture (CDC) operation to start. Use either CdcStartPosition or CdcStartTime to specify when you want the CDC operation to start. Specifying both values results in an error.

The value can be in date, checkpoint, or LSN/SCN format.

Date Example: –cdc-start-position “2018-03-08T12:12:12”

Checkpoint Example: –cdc-start-position “checkpoint:V1#27#mysql-bin-changelog.157832:1975:-1:2002:677883278264080:mysql-bin-changelog.157832:1876#0#0#*#0#93”

LSN Example: –cdc-start-position “mysql-bin-changelog.000024:373”

CdcStopPosition -> (string)

Indicates when you want a change data capture (CDC) operation to stop. The value can be either server time or commit time.

Server time example: –cdc-stop-position “server_time:2018-02-09T12:12:12”

Commit time example: –cdc-stop-position “commit_time: 2018-02-09T12:12:12 “

RecoveryCheckpoint -> (string)

Indicates the last checkpoint that occurred during a change data capture (CDC) operation. You can provide this value to the CdcStartPosition parameter to start a CDC operation that begins at that checkpoint.

ReplicationTaskArn -> (string)

The Amazon Resource Name (ARN) of the replication task.

ReplicationTaskStats -> (structure)

The statistics for the task, including elapsed time, tables loaded, and table errors.

FullLoadProgressPercent -> (integer)

The percent complete for the full load migration task.

ElapsedTimeMillis -> (long)

The elapsed time of the task, in milliseconds.

TablesLoaded -> (integer)

The number of tables loaded for this task.

TablesLoading -> (integer)

The number of tables currently loading for this task.

TablesQueued -> (integer)

The number of tables queued for this task.

TablesErrored -> (integer)

The number of errors that have occurred during this task.

FreshStartDate -> (timestamp)

The date the replication task was started either with a fresh start or a target reload.

StartDate -> (timestamp)

The date the replication task was started either with a fresh start or a resume. For more information, see StartReplicationTaskType .

StopDate -> (timestamp)

The date the replication task was stopped.

FullLoadStartDate -> (timestamp)

The date the replication task full load was started.

FullLoadFinishDate -> (timestamp)

The date the replication task full load was completed.

TaskData -> (string)

Supplemental information that the task requires to migrate the data for certain source and target endpoints. For more information, see Specifying Supplemental Data for Task Settings in the Database Migration Service User Guide.

TargetReplicationInstanceArn -> (string)

The ARN of the replication instance to which this task is moved in response to running the ` MoveReplicationTask https://docs.aws.amazon.com/dms/latest/APIReference/API_MoveReplicationTask.html`__ operation. Otherwise, this response parameter isn’t a member of the ReplicationTask object.

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