System Limits

This section summarizes the system limits. Alerts or log messages are generated when the system reaches the warning count, so this is a threshold. No more objects of the specified type can be created when the system reaches the maximum count, so this is a limit.

IMPORTANT:

Volume scalability to 10,000 volumes per group is supported when the group leader is an array model that supports 10,000 volumes, and it belongs to a pool that can also support this limit. Pool limits are the same as the limits of the smallest capacity array in the pool.

See the notes at the end of the table for information about array models that support specific limits.

See Relationship of Groups, Pools, Arrays, Folders, and Volumes in the Array Overview section for information about the scope of objects in single-array and multi-array groups.

Table 1. System Limits
Object Type	Scope	iSCSI Maximum	FC Maximum	Warning	Notes
Array	Group	4	4	4
Array	Pool	4	4	4
Branch	Group	10,000	10,000	9,500
CHAP user	Group	1024	N/A	960
Data connection	Controller	80,000 15,000	80,000 15,000	72,000 13,500	An iSCSI or a Fibre Channel path to a volume 1 (80000) 2 (15000)
Session	Array	12,000	12,000	None	An iSCSI session or FC login
FC initiator	FC port	N/A	256	None	Prior to OS 4.x, this value was 128.
Folder	Pool	256	256	256
Folder	Group	256	256	256
Initiator	Initiator group	256	256	240
Initiator	Group	10,000	10,000	9,500
Initiator group	Subnet	60	N/A	54
Initiator group	Group	1,024	1,024	960
Network configuration	Array	4	4	4
Performance policy	Group	115	115	105
Pool	Group	4	4	4
Protection schedule	Group	5,000	5,000	4,950
	Protection template	10	10	8
	Volume collection	10	10	8
Protection template	Group	50	50	45
Replication bandwidth policy (throttle)	Group	50	50	45
Replication bandwidth policy (throttle)	Replication partner	25	25	20
Replication partner	Group	50	50	45
Replication partner	Pool	50	50	45
Route	Network configuration	60	60	54
SSH key	User	10	10	8
Snapshot	Group	300,000 190,000	300,000 190,000	275,000 175,000	1 2 3
	Pool	300,000 190,000	300,000 190,000	275,000 175,000	1 2 3
	Volume	1,000	1,000	900
Writable Snapshot	Array	40,000 10,000	40,000 10,000	None	1 2 4
Snapshot Collection	Volume Collection	1,000	1,000	900
Subnet	Network configuration	60	60	54
User account	Group	100	100	90
Volume	Group	10,000 1,024	10,000 1,024	9,600 960	1 2
	Pool	10,000 1,024	10,000 1,024	9,600 960	1 2
	Performance policy	10,000 1,024	10,000 1,024	9,600 960	1 2
	Volume collection	50	50	45	Volumes in a collection can exist in different pools.
	Synchronous replication	512	512	N/A	These values also apply to Peer Persistence.
	Volume limit	127 TiB	127 TiB	N/A
Volume access control list (ACL)	Group	64,000	64,000	63,900
	Pool	64,000	64,000	63,900
	Volume	64	64	60
Volume collection	Group	2,000 512	2,000 512	1,800 480	1 2
NOTE: 1 Limits apply to AF5000, AF7000, AF9000, AF40, AF60, AF80, and HPE Alletra 6000 model arrays. 2 Limits apply to all model arrays not listed in Note 1. 3 A frequent schedule is a schedule in a volume collection that triggers snapshots more often than every five minutes. There is a limitation of five frequent schedules per array group. There is no restriction on schedules with a period of five minutes or more. 4 Writable snapshots also count against the total Snapshot limit.