Difference between session affinity and sticky session

Question

What is the difference between session affinity and sticky session in context of load balancing servers

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This article clarifies the question for me and discusses other types of load balancer persistence   Dave s Thoughts  Load balancer persistence  sticky sessions

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Sticky session means to route the requests of particular session to the same physical machine who served the first request for that session

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As I ve always heard the terms used in a load-balancing scenario  they are interchangeable   Both mean that once a session is started  the same server serves all requests for that session

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Sticky session means that when a request comes into a site from a client all further requests go to the same server initial client request accessed   I believe that session affinity is a synonym for sticky session

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They are Synonyms  No Difference At all  Sticky Session   Session Affinity   Affinity Stickiness Contact between user session and  the server to which user request is sent is retained

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I ve seen those terms used interchangeably  but there are different ways of implementing it    Send a cookie on the first response and then look for it on subsequent ones   The cookie says which real server to send to  Bad if you have to support cookie-less browsers Partition based on the requester s IP address  Bad if it isn t static or if many come in through the same proxy  If you authenticate users  partition based on user name  it has to be an HTTP supported authentication mode to do this   Don t require state  Let clients hit any server  send state to the client and have them send it back  This is not a sticky session  it s a way to avoid having to do it    I would suspect that sticky might refer to the cookie way  and that affinity might refer to  2 and  3 in some contexts  but that s not how I have seen it used  or use it myself

User · Answer

They are the same   Both mean that when coming in to the load balancer  the request will be directed to the server that served the first request  and has the session

[session] Difference between session affinity and sticky session?

Examples related to session

Examples related to load-balancing