Thanks Chris. I am not sure whether the sticky session is needed or not. The session replication also may not be needed. My requirement is very simple. There are 2 back end servers. I want both gets same user communication at the same time, so that, if one server fails the other can continue. I though cluster is the solution. Does the session replication come with the clustering feature?
VIP means Virtual IP address given to client. Back-end servers can be communicated using the VIP no matter where the LB routes the requests to RH On Tue, Jan 28, 2014 at 10:24 AM, Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Raquib, > > On 1/28/14, 10:03 AM, Raquib Hasan wrote: > > I am creating a tomcat cluster following helps I found online. My > > question is, do I have to use the Apache(mod_jk) for session > > replication? > > No. > > > Is it possible to use F5 load balancer directly bypassing the > > Apache? > > Yes. (Note this is not "bypassing" Apache [httpd]... it's simply not > using it at all. Use of httpd is common, but certainly not required by > any stretch. > > The lb is not involved in session replication. > > If you want to use sticky sessions, you'll need to properly configure > the lb to understand how to "stick" the sessions to a back-end server. > > > Primary purpose of the cluster is fail over. Load balancing is not > > needed. I think session replication is needed for a successful fail > > over. > > That depends upon the nature of your webapp. Note that > session-replication is time-consuming and puts certain constraints on > the objects you store in the session. > > > I am thinking like, there would be a LB VIP that the client > > requests would be communicating with. The sticky session would be > > enabled in the LB and there is no need of apache web server in > > between. Is this the right way of thinking? > > What do you mean VIP? > > How many back-end servers were you considering using? > > > I could not find the answer any where. Every example I found online > > starts with an apache web server. > > Using mod_jk (or mod_proxy_ajp) just makes everything easier given the > configuration options, etc. All of the ASF documentation covers the > use of httpd because it's freely-available and supported by the same > organization. The ASF isn't going to maintain configuration > instructions for a produce sold and supported by a commercial entity. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQIcBAEBCAAGBQJS58uZAAoJEBzwKT+lPKRYOrMP/AxfjLwYrr5k3ishLEjDWwlw > uvJnXLMS1uW06XVBRqkevwRerz+4uKF8GlFPsnAcZd3h3MfPd+nhvtrSo5gXCgk3 > aF+H+UNvq1axY7gAbI1syNCT3lUb1dQ4T+tbsuKILE4/LfE2+BqaIyEEUk3dpUq0 > hi9IdaPolZdtf1Zikt5stYljqrNwY16S2mGFliICrHcpKa8rPL6TaDxIgmmhm4XV > zpziYZBCKaUqA2qadmFzUlRJSvZXmHqjmAXd6+dsMjzyIloeRntfBiktVbEh+EZg > WlXvoIaU6m3AEpK9c+A0QeCi1i8J5uMvGFAHbBp7+9XttZZdAfKwEr4jGRSvfnk4 > nBaPFkEZZimmvh+i68bcysIPjVQVYzG2UHFsgTkie0SYhV1P8u6R7ugYGav9Uu2R > WfMLJm9V+0r3mAgR/aD4B4VQ7JYEavQ4YAldBQeb2IRqygBB2DCTawyIiHm3RiJ5 > e7I0P2EXBjYhOZaQSQ0oWnLyF8JzGTIPy2B5b+qIHWYNBdV94/yvvBUp4iZhLEc7 > NYgfhBczcRBlsmhvqVUcRrnyHdmf/sfgaZsiEs6zuTVrbZUoPKxoJJ6BmkhcMRbh > EgT2iMFL56IIRGKS2Is92vxoLV1Y/Kl5DYDceWw1qgveqZr2rPWfsNEP43RssM36 > pDdpqUCFLJ1PD24FHaL8 > =OKXz > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
