Persistence, Affinity, Sticky session and others

Affinity: this is when we use information from a layer below the application layer to maintain a client request to a single server

Persistence: this is when we use Application layer information to stick a client to a single server

sticky session: a sticky session is a session maintained by persistence

The main advantage of the persistence over affinity is that it’s much more accurate, but sometimes, Persistence is not doable, so we must rely on affinity.

Using persistence, we mean that we’re 100% sure that a user will get redirected to a single server.

Using affinity, we mean that the user may be redirected to the same server…

https://www.haproxy.com/blog/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/

More info:

https://stackoverflow.com/questions/2528935/sending-cookie-with-http-request-in-java

https://stackoverflow.com/questions/4166129/apache-httpclient-4-0-3-how-do-i-set-cookie-with-sessionid-for-post-request

https://docs.oracle.com/cd/E24329_01/web.1211/e21049/sessions.htm#WBAPP323

https://stackoverflow.com/questions/4166129/apache-httpclient-4-0-3-how-do-i-set-cookie-with-sessionid-for-post-request

https://docs.oracle.com/cd/E24329_01/web.1211/e24425/bigip.htm#CLUST574

https://docs.oracle.com/cd/E11035_01/wls100/cluster/load_balancing.html#wp1028843
https://devcentral.f5.com/questions/sticky-session-for-cookiless-clients  (cooki-less) !!!

https://community.oracle.com/thread/3379174

https://serverfault.com/questions/903386/apache-balancing-towards-weblogic-backends-mod-wl-vs-mod-proxy-balancer