For authenticated users, the Jahia stores data in the HTTP session. By default, this data is stored in memory of the server, where requests of a session are routed to. When the server is shut down, all this session data disappears and the user will have to login again and eventually re-do steps. For higher availability and up-time we recommend replicating the session data on all servers, so that sessions survive a stopped server and that other servers can continue working on user requests, which were previously served from the stopped server. This way the user will not even perceive that there was a problem and will not get unsatisfied.
In its version 1.0.0, the distributed-sessions module is using a Redis server.
In its version 2.0.0, the distributed-sessions module offers the ability to distribute sessions on all servers with hazelcast.
For more details please check the fine tuning guide available on Jahia Academy
The Jahia Distributed Sessions module is not installed by default with Jahia DX. It can be downloaded here and installed later using the Modules component in Jahia DX administration. It can also be directly installed using the Modules component in Jahia DX administration.
It needs Jahia jQuery, Jahia CKEditor, Jahia Static Assets and Default Jahia Templates modules installed to function properly.
= JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION =
Copyright (C) 2002-2017 Jahia Solutions Group SA. All rights reserved.
THIS PROGRAM IS AVAILABLE UNDER TWO DIFFERENT LICENSES:
1/GPL OR 2/JSEL
IF YOU DECIDE TO CHOOSE THE GPL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
2/ JSEL - Commercial and Supported Versions of the program
IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
Alternatively, commercial and supported versions of the program - also known as
Enterprise Distributions - must be used in accordance with the terms and conditions
contained in a separate written agreement between you and Jahia Solutions Group SA.
If you are unsure which license is appropriate for your use,
please contact the sales department at firstname.lastname@example.org.