Jelastic sets up replication between pairs of Tomcat servers using multicast replication. If one of the instances fails, the users who were on that instance are automatically moved to the other instance in the cluster. If both instances in a cluster were to fail, users would get redirected to another cluster. Jelastic automates the replication configuration, something it does for all the Java application servers it supports.
To get your Tomcat 6 server in the cloud, simply:
1. Log onto
2. Click Create Environment,
3. Pick Tomcat 6 for your application servers as shown in the picture below:
Once the environment is created, you can click Open in browser button next to the Tomcat server in the environment (expand the environment in the Environments pane at the top of the screen):
Then you can upload the Java application WAR package and deploy it to the environment.
So how are your environment's resources affected in Tomcat 6?
|Servlet containers configuration||Resources being consumed by environment|
|1 Tomcat||100-105 MB (1 cloudlet)|
|2 Tomcats (no replication)||160-175 MB (3 cloudlets)|
|3 Tomcats||250-260 MB (4 cloudlets)|
|4 Tomcats (no replication)||380-390 MB (5 cloudlets)|
|2 Tomcats (replication on)||220-235 MB (3 cloudlets)|
|4 Tomcats (replication on)||430-450 MB (5 cloudlets)|