Destination address affinity persistence

You can optimize your server array with destination address affinity persistence. Destination address affinity persistence, also known as sticky persistence, directs requests for a certain destination IP address to the same server, regardless of which client made the request. This type of persistence provides the most benefits when load balancing caching servers. A caching server intercepts web requests and returns a cached web page if it is available. In order to improve the efficiency of the cache on these servers, it is necessary to send similar requests to the same server repeatedly. You can use the destination address affinity persistence type to cache a given web page on one server instead of on every server in an array. This saves the other servers from having to duplicate the web page in their cache, wasting memory.

Destination Address Affinity profile settings

Setting	Description	Default Value
Name	Specifies a unique name for the profile. This setting is required.	No default value
Persistence Type	Specifies the type of persistence profile. This setting is required.	Destination Address Affinity
Mirror Persistence	Specifies, when enabled (checked), that if the active unit goes into the standby mode, the system mirrors any persistence records to its peer.	Disabled (Cleared)
Match Across Services	Specifies that all persistent connections from a client IP address that go to the same virtual IP address also go to the same node.	Disabled (Cleared)
Match Across Virtual Servers	Specifies that all persistent connections from the same client IP address go to the same node.	Disabled (Cleared)
Match Across Pools	Specifies that the BIG-IP system can use any pool that contains this persistence entry.	Disabled (Cleared)
Mask	Specifies the mask that the BIG-IP system should use before matching with an existing persistence entry.	255.255.255.255
Timeout	Specifies the duration, in seconds, of a persistence entry. For background information on setting timeout values, see Chapter 1, Introducing BIG-IP Local Traffic Manager. Possible values are: Specify: Specifies the number of seconds before the persistence entry expires Indefinite: Specifies that the persistence entry does not expire.	180
Override Connection Limit	Specifies, when checked (enabled), that the system allows you to specify that pool member connection limits are overridden for persisted clients. Per-virtual connection limits remain hard limits and are not overridden.	Disabled (Cleared)