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Start a SnapMirror transfer operation

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POST /snapmirror/relationships/{relationship.uuid}/transfers

Introduced In: 9.6

Starts a SnapMirror transfer operation. This API initiates a restore operation if the SnapMirror relationship is of type "restore". Otherwise, it intiates a SnapMirror "initialize" operation or "update" operation based on the current SnapMirror state.

Default property values

  • storage_efficiency_enabled - true

  • snapmirror update

  • snapmirror initialize

  • snapmirror restore

Examples

The following examples show how to perform SnapMirror "initialize", "update", and "restore" operations.

Perform SnapMirror initialize or update

 POST "/api/snapmirror/relationships/e4e7e130-0279-11e9-b566-0050568e9909/transfers" '{}'

Perform SnapMirror initialize, update or restore with throttle value set

 POST "/api/snapmirror/relationships/e4e7e130-0279-11e9-b566-0050568e9909/transfers" '{"throttle":"100"}'

Perform SnapMirror restore transfer of a file

 POST "/api/snapmirror/relationships/c8c62a90-0fef-11e9-b09e-0050568e7067/transfers" '{"source_snapshot": "src", "files":[{"source_path": "/a1.txt.0", "destination_path": "/a1-renamed.txt.0"}]}'

Performing a SnapMirror initialize or update using a particular Snapshot copy.

 POST "/api/snapmirror/relationships/e4e7e130-0279-11e9-b566-0050568e9909/transfers" '{"source_snapshot":"snap1"}'

Learn more

Parameters

Name Type In Required Description

relationship.uuid

string

path

True

Relationship UUID

return_records

boolean

query

False

The default is false. If set to true, the records are returned.

  • Default value:

return_timeout

integer

query

False

The number of seconds to allow the call to execute before returning. When doing a POST, PATCH, or DELETE operation on a single record, the default is 0 seconds. This means that if an asynchronous operation is started, the server immediately returns HTTP code 202 (Accepted) along with a link to the job. If a non-zero value is specified for POST, PATCH, or DELETE operations, ONTAP waits that length of time to see if the job completes so it can return something other than 202.

  • Default value: 1

  • Max value: 120

  • Min value: 0

Request Body

Name Type Description

_links

_links

bytes_transferred

integer

Bytes transferred

checkpoint_size

integer

Amount of data transferred in bytes as recorded in the restart checkpoint.

end_time

string

End time of the transfer.

error_info

error_info

Error information for the transfer.

files

array[files]

This is supported for transfer of restore relationship only. This specifies the list of files or LUNs to be restored. Can contain up to eight files or LUNs.

network_compression_ratio

string

Specifies the compression ratio achieved for the data sent over the wire with network compression enabled. This property is only valid for active transfers.

on_demand_attrs

string

Specifies whether or not an on-demand restore is being carried out. This is only supported for the transfer of restore relationships for entire volumes from the object store. A value for read_write_with_user_data_pull should be provided to start an on-demand restore. A file restore from the object store does not support this option.

relationship

relationship

snapshot

string

Name of Snapshot copy being transferred.

source_snapshot

string

Specifies the Snapshot copy on the source to be transferred to the destination.

state

string

Status of the transfer. Set PATCH state to "aborted" to abort the transfer. Set PATCH state to "hard_aborted" to abort the transfer and discard the restart checkpoint. To find "queued" transfers refer to relationships GET API.

storage_efficiency_enabled

boolean

This is supported for transfer of restore relationship only. Set this property to "false" to turn off storage efficiency for data transferred over the wire and written to the destination.

throttle

integer

Throttle, in KBs per second. This "throttle" overrides the "throttle" set on the SnapMirror relationship or SnapMirror relationship's policy. If neither of these are set, defaults to 0, which is interpreted as unlimited.

total_duration

string

Elapsed transfer time.

uuid

string
Example request 
{
  "_links": {
    "self": {
      "href": "/api/resourcelink"
    }
  },
  "bytes_transferred": 0,
  "checkpoint_size": 0,
  "end_time": "2020-12-02 21:36:19 -0500",
  "error_info": {
    "code": 6620046,
    "message": "Transfer aborted"
  },
  "files": {
    "destination_path": "/dirb/file2",
    "source_path": "/dira/file1"
  },
  "network_compression_ratio": 61,
  "on_demand_attrs": "read_write_with_user_data_pull",
  "relationship": {
    "destination": {
      "cluster": {
        "_links": {
          "self": {
            "href": "/api/resourcelink"
          }
        },
        "name": "cluster1",
        "uuid": "1cd8a442-86d1-11e0-ae1c-123478563412"
      },
      "consistency_group_volumes": {
        "name": "volume1",
        "uuid": "028baa66-41bd-11e9-81d5-00a0986138f7"
      },
      "ipspace": "Default",
      "path": "svm1:volume1",
      "svm": {
        "_links": {
          "self": {
            "href": "/api/resourcelink"
          }
        },
        "name": "svm1",
        "uuid": "02c9e252-41be-11e9-81d5-00a0986138f7"
      }
    },
    "uuid": "d2d7ceea-ab52-11e8-855e-00505682a4c7"
  },
  "snapshot": "string",
  "state": "aborted",
  "throttle": 0,
  "total_duration": "PT28M41S",
  "uuid": "4ea7a442-86d1-11e0-ae1c-123478563412"
}

Response

Status: 201, Created

Headers

Name Description Type

Location

Useful for tracking the resource location

string

Error

Status: Default

ONTAP Error Response codes

Error code Description

13303845

Restore operation failed

13303812

Initialize operation failed

13303844

Update operation failed

13303846

Empty source path file list

13303847

Invalid arguments

13304040

Throttle not supported for update of Synchronous SnapMirror relationships

6620237

SnapMirror relationship database write failed

6620238

SnapMirror relationship database read failed
Name Type Description

error

error
Example error 
{
  "error": {
    "arguments": {
      "code": "string",
      "message": "string"
    },
    "code": "4",
    "message": "entry doesn't exist",
    "target": "uuid"
  }
}

Definitions

See Definitions

href

Name Type Description

href

string

_links

Name Type Description

self

href

error_info

Error information for the transfer.

Name Type Description

code

integer

Error code

message

string

Error message

files

Specifies a file or LUN consisting of a source_path and an optional destination_path. If not specified, the destination_path is the same as the source_path. File restore is not supported if the source_path or destination_path contains commas in its directory or file name.

Name Type Description

destination_path

string

source_path

string

cluster

Name Type Description

_links

_links

name

string

uuid

string

consistency_group_volumes

Name Type Description

name

string

The name of the volume.

uuid

string

Unique identifier for the volume. This corresponds to the instance-uuid that is exposed in the CLI and ONTAPI. It does not change due to a volume move.

  • example: 028baa66-41bd-11e9-81d5-00a0986138f7

  • x-ntap-createOnly: true

  • Introduced in: 9.8

  • x-nullable: true

svm

Name Type Description

_links

_links

name

string

The name of the SVM.

uuid

string

The unique identifier of the SVM.

snapmirror_endpoint

Endpoint of a SnapMirror relationship. For a GET request, the property "cluster" is populated when the endpoint is on a remote cluster. A POST request to create the destination SVM endpoint or to establish an SVM DR relationship must have the property "cluster" populated with the remote cluster details. A POST request to create the destination FlexVol volume, FlexGroup volume, Consistency Group, ONTAP S3 bucket and NON-ONTAP object-store endpoints can optionally specify the "cluster" property when the source SVM and the destination SVM are peered. A POST request to establish a SnapMirror relationship between the source endpoint and destination endpoint and when the source SVM and the destination SVM are not peered, must specify the "cluster" property for the remote endpoint.

Name Type Description

cluster

cluster

consistency_group_volumes

array[consistency_group_volumes]

Mandatory property for a Consistency Group endpoint. Specifies the list of FlexVol volumes for a Consistency Group.

ipspace

string

Optional property to specify the IPSpace of the SVM.

path

string

ONTAP FlexVol/FlexGroup - svm1:volume1 ONTAP SVM - svm1: ONTAP Consistency Group - svm1:/cg/cg_name ONTAP S3 - svm1:/bucket/bucket1 NON-ONTAP - objstore1:/objstore

  • example: svm1:volume1

  • Introduced in: 9.6

  • x-nullable: true

svm

svm

relationship

Name Type Description

destination

snapmirror_endpoint

Endpoint of a SnapMirror relationship. For a GET request, the property "cluster" is populated when the endpoint is on a remote cluster. A POST request to create the destination SVM endpoint or to establish an SVM DR relationship must have the property "cluster" populated with the remote cluster details. A POST request to create the destination FlexVol volume, FlexGroup volume, Consistency Group, ONTAP S3 bucket and NON-ONTAP object-store endpoints can optionally specify the "cluster" property when the source SVM and the destination SVM are peered. A POST request to establish a SnapMirror relationship between the source endpoint and destination endpoint and when the source SVM and the destination SVM are not peered, must specify the "cluster" property for the remote endpoint.

  • Introduced in: 9.6

restore

boolean

Is the relationship for restore?

uuid

string

snapmirror_transfer

SnapMirror transfer information

Name Type Description

_links

_links

bytes_transferred

integer

Bytes transferred

checkpoint_size

integer

Amount of data transferred in bytes as recorded in the restart checkpoint.

end_time

string

End time of the transfer.

error_info

error_info

Error information for the transfer.

files

array[files]

This is supported for transfer of restore relationship only. This specifies the list of files or LUNs to be restored. Can contain up to eight files or LUNs.

network_compression_ratio

string

Specifies the compression ratio achieved for the data sent over the wire with network compression enabled. This property is only valid for active transfers.

on_demand_attrs

string

Specifies whether or not an on-demand restore is being carried out. This is only supported for the transfer of restore relationships for entire volumes from the object store. A value for read_write_with_user_data_pull should be provided to start an on-demand restore. A file restore from the object store does not support this option.

relationship

relationship

snapshot

string

Name of Snapshot copy being transferred.

source_snapshot

string

Specifies the Snapshot copy on the source to be transferred to the destination.

state

string

Status of the transfer. Set PATCH state to "aborted" to abort the transfer. Set PATCH state to "hard_aborted" to abort the transfer and discard the restart checkpoint. To find "queued" transfers refer to relationships GET API.

storage_efficiency_enabled

boolean

This is supported for transfer of restore relationship only. Set this property to "false" to turn off storage efficiency for data transferred over the wire and written to the destination.

throttle

integer

Throttle, in KBs per second. This "throttle" overrides the "throttle" set on the SnapMirror relationship or SnapMirror relationship's policy. If neither of these are set, defaults to 0, which is interpreted as unlimited.

total_duration

string

Elapsed transfer time.

uuid

string

error_arguments

Name Type Description

code

string

Argument code

message

string

Message argument

error

Name Type Description

arguments

array[error_arguments]

Message arguments

code

string

Error code

message

string

Error message

target

string

The target parameter that caused the error.