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Posted to users@cocoon.apache.org by Gabriel Gruber <Ga...@workflow.at> on 2008/01/22 07:53:47 UTC
Terracotta Clustering for solving the "continuation-serialisation-problem" in
a cluster environment?
Hello dear Experts,
We are currently implementing our cocoon 2.1.10/spring/hibernate based
application at a big customer in a clustered environment on tomcat 5.028
and JDK 1.4x using Apache 2.0 and mod_jk as load-balancer. As recommended
we use "sticky-sessions" due to the fact, that serialisation of
session-state (and their nested flowscript continuations) is not possible.
However there seems to be a new star on the sky of clustering named
terracotta which virtually builds a "grid of jvms". Terracotta has finally
gone open source and offers their product on the base of TPL which is a
slightly modification of the Mozilla Public Licence (MPL):
http://www.terracotta.org/confluence/display/orgsite/Licensing
As a specific usecase http session clustering is well documented in the
terracota documentation. In contrast to "classic" http clustering
solutions, terracotta does NOT serialize the http session-objects but
rather "shares a tree of objects between cluster nodes".
http://www.terracotta.org/confluence/display/docs1/Sessions+Quick+Start
Might this finally be a solution for having a seamless failover for cocoon
users with flow continuations, cforms models and all that stuff?
Gabriel
______________________
Mag. Gabriel Gruber
Senior Consultant
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