What are the different ways to schedule SnapMirror updates using ONTAP features?
Applies to
- ONTAP 9.7+
- SnapMirror
- SnapVault
Answer
There are two possible ways to make a SnapMirror update by schedule since ONTAP 9.7:
-
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 a 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 field
transfer-schedule-nameis public in ONTAP 9.11.1. For more details, refer to BUG 1349723 - Considerations for SnapMirror policies with "transfer_schedule" and the "-schedule" parameters in a SnapMirror relationship