What are the different ways to schedule SnapMirror updates using ONTAP features?

Put a schedule as a parameter of the SnapMirror relationship:

• A cron schedule can be set as a SnapMirror variable during the creation of a relationship:

 cluster1::> snapmirror create -source-path test: ?
   { [-destination-path] {<[vserver:][volume]>|<[[cluster:]//vserver/]volume>|<hostip:/lun/name>|<hostip:/share/share-name>|<[vserver:]/cg/[cgname]>}  Destination Path
  | [ -destination-cluster <cluster_name> ]     Destination Cluster (default: cluster1)
     [-destination-vserver] <vserver name>      Destination Vserver
    [[-destination-volume] <volume name>] }     Destination Volume (default: "")
  [[-type] {DP|LS|XDP|RST|TDP}]                 Relationship Type
  [ -vserver <vserver name> ]                   Managing Vserver
  [ -schedule <text> ]                          SnapMirror Schedule
  [ -policy <snapmirror policy> ]               SnapMirror Policy
  [ -tries {<integer>|unlimited} ]              Tries Limit
  [ -throttle|-k {<integer>|unlimited} ]        Throttle (KB/sec) (default: unlimited)
  [ -cg-item-mappings {<source volume>:@<destination volume>|<source item path>:@<destination item path>}, ... ]                                                             Consistency Group Item Mappings
  [ -identity-preserve {true|false} ]           Identity Preserve Vserver DR (default: false)
  [ -is-auto-expand-enabled {true|false} ]      Is Auto Expand Enabled

• A cron schedule can be set as a SnapMirror variable during modification of a relationship by CLI:

cluster1::> snapmirror modify -source-path test: ?
   { [-destination-path] {<[vserver:][volume]>|<[[cluster:]//vserver/]volume>|<hostip:/lun/name>|<hostip:/share/share-name>|<[vserver:]/cg/[cgname]>}  Destination Path
  | [ -destination-cluster <cluster_name> ]     Destination Cluster
     [-destination-vserver] <vserver name>      Destination Vserver
     [-destination-volume] <volume name> }      Destination Volume
  [[-vserver] <vserver name>]                   Managing Vserver
  [ -schedule <text> ]                          SnapMirror Schedule
  [ -policy <snapmirror policy> ]               SnapMirror Policy
  [ -tries {<integer>|unlimited} ]              Tries Limit
  [ -throttle|-k {<integer>|unlimited} ]        Throttle (KB/sec)
  [ -is-auto-expand-enabled {true|false} ]      Is Auto Expand Enabled
  [ -foreground|-w [true] ]                     Foreground Process

Put a schedule over the SnapMirror Policy:

• You can add a schedule for the SnapMirror policy in ONTAP System Manager:

• You can add the feature by CLI with hidden command
• SnapMirror policies with a schedule can be checked, added, or modified with a hidden field called "transfer-schedule-name":

cluster::> snapmirror policy show -fields transfer-schedule-name

• The command will be publicly listed in future releases of ONTAP

Note: 

• You cannot have both of the schedule types in the same relationship
• Please, be aware this schedule must not be mixed with the vault/MirrorAndVault feature of local Snapshot creation over the destination Long-term retention as part of a rule