StartDiskReplicaGroup -

Enables the async replication feature for replication pairs that belong to a replication pair-consistent group. When the async replication feature is enabled for the pairs for the first time, the system first performs a full synchronization to synchronize all data from disks at the primary site (primary disks) to disks at the secondary site (secondary disks) and then periodically synchronizes incremental data based on the recovery point objective (RPO) of the replication pair-consistent group.

Usage notes

For information about the regions in which the replication pair-consistent group feature is available, see Overview.
If you want to perform automatic synchronization by setting OneShot to false, make sure that the replication pair-consistent group is in the Created (created), Syncing (syncing), Normal (normal), or Stopped (stopped) state.
If you want to perform a one-time synchronization by setting OneShot to true, make sure the replication pair-consistent group is in the Created (created), One-time Syncing (manual_syncing), or Stopped (stopped) state. The time interval between two consecutive one-time synchronizations must be longer than one half of the RPO.
After a replication pair-consistent group is activated, it enters the Initial Syncing (initial_syncing) state and the system performs the first asynchronous replication to replicate all data from the primary disks to secondary disks.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter	Type	Required	Example	Description
Action	String	Yes	StartDiskReplicaGroup	The operation that you want to perform. Set the value to StartDiskReplicaGroup.
RegionId	String	Yes	cn-beijing	The region ID of the replication pair-consistent group.
ReplicaGroupId	String	Yes	pg-myreplica****	The ID of the replication pair-consistent group.
ClientToken	String	No	123e4567-e89b-12d3-a456-42665544****	The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.
OneShot	Boolean	No	false	Specifies whether to immediately synchronize data. Valid values: true: immediately synchronizes data. false: synchronizes data based on the RPO. Default value: false.

Response parameters

Parameter	Type	Example	Description
RequestId	String	C123F94F-4E38-19AE-942A-A8D6F44F****	The ID of the request.

Examples

Sample requests

http(s)://ecs.aliyuncs.com/?Action=StartDiskReplicaGroup
&RegionId=cn-beijing
&ReplicaGroupId=pg-myreplica****
&ClientToken=123e4567-e89b-12d3-a456-42665544****
&OneShot=false
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<StartDiskReplicaGroupResponse>
    <RequestId>C123F94F-4E38-19AE-942A-A8D6F44F****</RequestId>
</StartDiskReplicaGroupResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "RequestId" : "C123F94F-4E38-19AE-942A-A8D6F44F****"
}

Error codes

HTTP status code	Error code	Error message	Description
400	OperationDenied.StandbyDeviceAttached	The secondary disk is attached.	The secondary disk is attached to an instance. Stop the instance or detach the disk from the instance.
403	OperationDenied	The operation is not allowed.	You cannot perform this operation.
403	OperationDenied.InvalidStatus	The operation is not allowed in current status.	You cannot perform this operation on the resource in the current state.
403	OperationDenied.ManualSyncLimit	One shot start manual syncing too frequently, please try again later.	The cooldown time of manual synchronization is invalid.
403	OperationDenied.NoPairInGroup	The operation is not allowed because no pair in the group.	The operation is not supported because no replication pairs belong to the specified replication pair-consistent group.
403	OperationDenied.PairGroupStatusConflict	The operation is not allowed due to pair and group status are not consistent.	The operation is not supported because the state of the replication pair is not the same as that of the replication pair-consistent group.
403	OperationDenied.PairGroupAZoneConflict	The operation is not allowed due to pair and group having different RegionId or ZoneId.	The operation is not supported because the replication pair-consistent group and the replication pair do not belong to the same region and zone.
403	OperationDenied.PairNotInGroup	The operation is not allowed because pair is not in any group.	The operation is not supported because the specified replication pair has not been added to any replication pair-consistent group.
403	Forbidden	User is not authorized to operate.	You do not have the permissions to perform this operation on the resource. Check the permissions of your account or contact your Alibaba Cloud account administrator.
403	Forbidden.Action	User is not authorized to operate this action.	You have no access to this operation. Check the permissions of your account or contact your Alibaba Cloud account administrator.
404	NoSuchResource	The specified resource does not exist.	The specified resource is not found.
500	InternalError	The request processing has failed due to some unknown error, exception or failure.	An internal error occurred.
504	RequestTimeout	The request is timeout, please try again later.	The request timed out. Try again later.

For a list of error codes, see Service error codes.