Converting existing relationships to SM-BC relationships
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You can convert an existing zero recovery point protection (zero RPO) Synchronous SnapMirror relationship to an SM-BC zero RTO Synchronous SnapMirror consistency group relationship.
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A zero RPO Synchronous SnapMirror relationship exists between the primary and secondary
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All LUNs on the destination volume are unmapped before the zero RTO SnapMirror relationship is created
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You must be a cluster and SVM administrator on the source and destination.
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You cannot convert zero RPO to zero RTO sync by changing the SnapMirror policy.
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If existing LUNs on the secondary volume are mapped,
snapmirror create
with AutomatedFailover policy triggers an error.
You must ensure the LUNs are unmapped before issuing thesnapmirror create
command.
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Perform a SnapMirror update operation on the existing relationship:
destination::>snapmirror update -destination-path vs1_dst:vol1
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Verify that the SnapMirror update completed successfully:
destination::>snapmirror show
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Quiesce each of the zero RPO synchronous relationships:
destination::>snapmirror quiesce -destination-path vs1_dst:vol1
destination::>snapmirror quiesce -destination-path vs1_dst:vol2
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Delete each of the zero RPO synchronous relationships:
destination::>snapmirror delete -destination-path vs1_dst:vol1
destination::>snapmirror delete -destination-path vs1_dst:vol2
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Release the source SnapMirror relationship but retain the common Snapshot copies:
source::>snapmirror release -relationship-info-only true -destination-path vs1_dst:vol1
source::>snapmirror release -relationship-info-only true -destination-path vs1_dst:vol2
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Create a group zero RTO Synchronous Snapmirror relationship:
destination::> snapmirror create -source-path vs1_src:/cg/cg_src -destination-path vs1_dst:/cg/cg_dst -cg-item-mappings vol1:@vol1,vol2:@vol2 -policy AutomatedFailover
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Resynchronize the zero RTO consistency group:
destination::> snapmirror resync -destination-path vs1_dst:/cg/cg_dst
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Rescan host LUN I/O paths to restore all paths to the LUNs.