Cookie persistence enforces persistence using HTTP cookies. As with all persistence modes, HTTP cookies ensure that requests from the same client are directed to the same pool member after the BIG-IP system initially load-balances them. The cookie persistence profile has four cookie persistence methods.
What is persistence based?
All persistence methods are based on the same principle, which is to find a unique identifier of a client and remember it for the desired length of time. The persistence information may be stored locally on Vantage Service Engines, or may be sent to a client, such as through a cookie or TLS ticket.
What is persistence in load balancing?
Session persistence ensures that a client will remain connected to the same server throughout a session or period of time. Because load balancing may, by default, send users to unique servers each time they connect, this can mean that complicated or repeated requests are slowed down.
What does session persistence mean?
Session stickiness, a.k.a., session persistence, is a process in which a load balancer creates an affinity between a client and a specific network server for the duration of a session, (i.e., the time a specific IP spends on a website).
What is F5 persistence profile?
A persistence profile is a pre-configured object that automatically enables persistence when you assign the profile to a virtual server. By using a persistence profile, you avoid having to write a program to implement a type of persistence.
What is F5 persistence?
Cookie persistence is a technique invented by F5 (shameless plug) that uses the HTTP cookie header to persist connections across a session. Most application servers insert a session id into responses that is used by developers to access data stored in the server session (shopping carts, etc… ).
What is the difference between source IP and cookie based persistence?
The Active Cookie or Source IP setting is identical to the Active Cookie Persistence. If, for any reason, the expected cookies are not present, then the source IP address will be used to determine persistence. All things being equal, if you are going to use Layer 7 persistence, this is the recommended method.
What is the difference between source IP and cookie-based persistence?
What is site persistence?
Site persistence is achieved using HTTP cookies (known as a “site cookie”) to reconnect the client to the same server. When the GSLB appliance responds to a client DNS request by sending the IP address of the selected GSLB site, the client sends an HTTP request to that GSLB site.
What is the difference between a persistent cookie policy and a QoS cookie policy in array network load balancer?
A Persistent Cookie policy selects a group based on the cookie name. A QoS Cookie policy selects a server group based on the cookie name and value assigned to that group.
What is a persistent profile?
A persistence profile governs the settings that will force a client to stay connected to the same server for a specified duration of time. Enabling a persistence profile ensures the client will reconnect to the same server every time, or at least for a desired duration of time. …
What is IP persistence?
The client IP address mode of persistence may be applied to any virtual service, regardless if it is TCP or UDP. With this persistence method, Vantage Service Engines will stick the client to the same server for the configurable duration of time and store the mapping in a local database.
What is cookie-based persistence and how does it work?
That technique is called cookie-based persistence. Rather than rely on the SSL/TLS session ID, the load balancer would insert a cookie to uniquely identify the session the first time a client accessed the site and then refer to that cookie in subsequent requests to persist the connection to the appropriate server.
What is persistence and how does it work?
Persistence—otherwise known as stickiness—is a technique implemented by ADCs to ensure requests from a single user are always distributed to the server on which they started. Some load balancing products and services describe this technique as “sticky sessions”, which is a completely appropriate moniker.
What data can be used to persist a session?
Any data that can be stored in a cookie or derived from the IP, TCP, or HTTP headers can be used to persist a session. In fact, any data within an application message that uniquely identifies the user can be used by an intelligent ADC to persist a connection between the browser and a server.
What happens when a server goes down in persistence?
When doing persistence, if a server goes down, then HAProxy will redispatch the user to an other server. Since the user will get connected on a new server, then this one may not be aware of the session, so be redirected to the login page.
