-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 To whom it may concern,
(Might we know your real name? The above introduction feels so impersonal...) On 7/24/13 11:13 AM, Tomcat Random wrote: > Setup: - Two physical servers each running Tomcat 7.0.42 - Brocade > load balancer in front > > The load balancer is set to source IP persistence for 5 minutes. > This time can be changed of course. > > The thing I don't understand is 5 minutes or 5 hours - at then end > that time limit the user can be sent to the other server and lose > data stored in the session. > > So why do sticky sessions matter when session replication turned on > in Tomcat? Is a performance issue? Sticky sessions aren't really necessary when session replication is on. On the other hand, session information takes non-zero time to propagate between the members of the cluster, so using session stickiness may reduce the risk of out-of-date sessions when a user randomly switches servers in the middle of a series of high-rate requests. I would recommend setting the stickiness timeout to the same as the session timeout, assuming that the lb is updating the last-touch time for every request mentioning the session. If that's not happening, then it probably doesn't really matter what you set your session stickiness timeout to be. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJR8B08AAoJEBzwKT+lPKRY7mwQAMN3eUGpNJ3ZgHQaGQbQJsel z93LU7OvNVDK1/I5P0HWAezYJ7CCrjKAVBz2IjXqTyeODrS8l6ubc8HKCFexPZlG PNBzr4TGx+OeKrlkVGWA7w8mo8LFPcWIwxKmVHPaVHBa30B4SXFXiGqanycn04F/ VRGFBCC1R3+NLhmn7Cag3ZpfhsnCN4a3XAYy0ZvrW/rARTOpGp68kccJppgv+Uab RYZzmGCYQZeLfI2j7BFaAntc38di9+O8X68N/nC4GqIzE+XvDD/ZkYFlvYtzBxNn k4MaoRS05KV53qbZrMqSldjU+heIfufB1mF+f/xXlPkOX/fZPVsH6fxEyuS6WPl5 4qd/Cs5XXNEvMbz/S4JY8ZtnmSONZr8xffHfJf9rUzNiVqcXGcIOkbg00ZHViUuF c/0ADkbrwe8nStChlRfj6h6xybiKo7404g90PA8Op3C4CwO22SOus4tCZdDwXw5H N9Kv6DORgPZlH9XaBJzEf6M1n1EruOI1pQ/LC9Lbc3pSAod4QRKbP1zDmfr61UG8 MF2fsXmvCCIie70rA2xlTk7PRpTwhPCbs7DRDrh/GavPeBomtl43fJSLfNczBMq8 zTpWfgSgOzOi+VR0+jV2JXQTCQ17nj4Jikl3VR3rUv+11C9rxOjB6vsc3Ir/FHju NKrqyHotyHH10s82Do4Z =Cr56 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
