Object limits for SnapMirror Business Continuity
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When preparing to use and managing SnapMirror Business Continuity, be aware of the following limitations.
Consistency groups in a cluster
Consistency group limits for a cluster with SM-BC are calculated based on relationships and depend on the version of ONTAP used. Limits are platform-independent.
ONTAP version | Maximum number of relationships |
---|---|
ONTAP 9.8-9.9.1 |
5 |
ONTAP 9.10.1 |
20 |
ONTAP 9.11.1 and later |
50 |
Volumes per consistency group
The maximum number of volumes per consistency group with SM-BC is platform independent.
ONTAP version | Maximum number of volumes supported in a consistency group relationship |
---|---|
ONTAP 9.8-9.9.1 |
12 |
ONTAP 9.10.1 and later |
16 |
Volumes
Volume limits in SM-BC are calculated based on the number of endpoints, not the number of relationships. A consistency group with 12 volumes contributes 12 endpoints on both the primary and secondary cluster. Both SM-BC and SnapMirror Synchronous relationships contribute to the total number of endpoints.
The maximum endpoints per platform are included in the following table.
S. No | Platform | Endpoints per HA for SM-BC | Overall sync and SM-BC endpoints per HA | ||||
---|---|---|---|---|---|---|---|
ONTAP 9.8-9.9.1 |
ONTAP 9.10.1 |
ONTAP 9.11.1 and later |
ONTAP 9.8-9.9.1 |
ONTAP 9.10.1 |
ONTAP 9.11.1 and later |
||
1 |
AFF |
60 |
200 |
400 |
80 |
200 |
400 |
2 |
ASA |
60 |
200 |
400 |
80 |
200 |
400 |
SAN object limits
SAN object limits are included in the following table. The limits apply regardless of the platform.
Object in an SM-BC relationship | Count |
---|---|
LUNs per volume |
256 |
LUN maps per node |
|
LUN maps per cluster |
|
LIFs per SVM (with at least one volume in an SM-BC relationship) |
256 |
Inter-cluster LIFs per node |
4 |
Inter-cluster LIFs per cluster |
8 |