Maximum number of concurrent replication operations

A volume SnapMirror replication, qtree SnapMirror replication, or SnapVault replication consists of two operations, one operation on the source side of the transfer and the other on the destination side. Therefore, if a storage system is the source of one replication and the destination of another replication, it uses two replication operations. Likewise, if a storage system is the source and destination of the same replication, it uses two replication operations.

Table 1. Maximum number of concurrent replication operations without NearStore personality license
Storage system model	Volume SnapMirror		Synchronous SnapMirror		Qtree SnapMirror		SnapVault		Open Systems SnapVault
	SRC	DSTN	SRC	DSTN	SRC	DSTN	SRC	DSTN	DSTN
FAS250	4	4	4	4	4	4	4	4	4
FAS270	8	8	8	8	8	8	8	8	8
FAS920	8	8	8	8	8	8	8	8	8
FAS940	16	16	16	16	16	16	16	16	16
FAS960	16	16	16	16	16	16	16	16	16
FAS980	50	50	16	16	64	64	64	64	16
FAS2020	8	8	8	8	16	16	16	16	8
FAS2050	8	8	8	8	32	32	32	32	8
FAS3020	50	50	16	16	64	64	64	64	16
FAS3040	50	50	16	16	64	64	64	64	16
FAS3050	50	50	16	16	64	64	64	64	16
FAS3070	50	50	16	16	64	64	64	64	16
FAS3140	50	50	16	16	64	64	64	64	16
FAS3160	50	50	16	16	64	64	64	64	16
FAS3170	50	50	16	16	64	64	64	64	16
FAS6030	100	100	24	24	96	96	96	96	24
FAS6040	100	100	24	24	96	96	96	96	24
FAS6070	150	150	32	32	128	128	128	128	32
FAS6080	150	150	32	32	128	128	128	128	32
R200	64	64	16	16	64	128	64	128	128

SRC—Source; DSTN—Destination

Table 2. Maximum number of concurrent replication operations with NearStore personality license
Storage system model	Volume SnapMirror		Synchronous SnapMirror		Qtree SnapMirror		SnapVault		Open Systems SnapVault
	SRC	DSTN	SRC	DSTN	SRC	DSTN	SRC	DSTN	DSTN
FAS2020	8	8	8	8	40	40	40	40	16
FAS2050	8	16	8	8	80	80	80	80	32
FAS3020	50	100	16	16	80	80	80	80	32
FAS3040	50	100	16	16	160	160	160	160	64
FAS3050	50	100	16	16	120	120	120	120	64
FAS3070	50	100	16	16	320	320	320	320	128
FAS3140	50	100	16	16	256	256	256	256	64
FAS3160	50	100	16	16	320	320	320	320	128
FAS3170	50	100	16	16	384	384	384	384	128
FAS6030	100	200	24	24	384	384	384	384	96
FAS6040	100	200	24	24	384	384	384	384	96
FAS6070	150	300	32	32	512	512	512	512	128
FAS6080	150	300	32	32	512	512	512	512	128
R200	NA	NA	NA	NA	NA	NA	NA	NA	NA

SRC—Source; DSTN—Destination

Note:

Each value listed in the preceding table indicates the maximum number of concurrent replication operations allowed for a specific storage system, when using a single type of replication. The values are exclusive, and not cumulative. For example, if you are using the maximum number of synchronous SnapMirror replication operations for a storage system as a source, you cannot use any more replication operations of any type for the storage system.
The R200 storage system has the NearStore personality enabled already.
The NearStore personality license is not supported on the following storage systems.
- FAS250
- FAS270
- FAS920
- FAS940
- FAS960
- FAS980

A storage system used as a NearStore system - the NearStore personality
When you want to use a storage system for backup only, it is recommended that you optimize your system for backup. Doing so uses fewer transfer resources.
Enabling NearStore functionality
You can enable the NearStore functionality to convert your storage system to a NearStore system.
Factors that affect the maximum number of concurrent operations
A storage system might not reach the maximum number of concurrent replication operations for the following reasons.
Maximum number of transfer resources in an active/active configuration
If a failover occurs, the surviving storage system cannot process more than the maximum number of concurrent replication operations specified for that storage system. These operations can be ones that were scheduled for the surviving storage system, the failed-over storage system, or both.

Parent topic: Deployment of SnapMirror

Related concepts

Data replication from one destination to another in a series (cascading)

Use of SnapMirror with S family storage systems

Related reference

Restrictions while using SnapMirror

Limit on entries in the snapmirror.conf file for each storage system