css11501 Whats the difference in persistence and stickiness

[dgambrill]

css11501 Whats the difference in persistence and stickiness

[jfoerster · Accepted solution]

Hi

persistance is if you split/do not split up one client http1.1 session in multiple http sessions (e.g if you want to request images from a cache and the rest from the real server)

stickiness is the mechanismen how you stick a client to a certain server (i.e. by client IP, by ssl-session-id, by cookie...)

regards,

Joerg

[Gilles Dufour · Accepted solution]

persistence is an HTTP concept.

With HTTP 1.1 you can now have 1 TCP connection for all your HTTP requests.

With this solution you reduce time by not having to open and close TCP connections for every request.

It is sometimes needed to break persistence to guarantee a better load sharing between the servers.

This is the case when multiplie users use the same proxy server.

The proxy would generally open a persistent connection and use it for all the requests from all the users.

Stickyness is a loadbalancing mechanism to guarantee that every TCP connections are sent to the same server.

You can do stickyness based on source ip, or SSLID, or a cookie, or ...

Stickyness is required when you have a website saving information about a user session [ie: a shopping basket].

Regards,

Gilles.