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smbc/considerations-limits.html
SM-BC, SMBC, restrictions, consistency group, endpoint limits, solaris, aix, hp-ux, fanout, snampmirror active sync
There are several additional restrictions and limitations when using the SnapMirror Business Continuity solution.

Object limits for SnapMirror Business Continuity

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

  • 4096 (ONTAP 9.10 and later)

  • 2048 (ONTAP 9.9.1 and earlier)

LUN maps per cluster

  • 8192 (ONTAP 9.10 and later)

  • 4096 (ONTAP 9.9.1 and earlier)

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