Difference between revisions of "Running many parallel instances"
old>Admin (Created page with "=== Preflight checklist === Before you go for a side-by-side setup please consider # Examine possibilities to use Exclusive group data ownership # Using docker containers ===...") |
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Before you go for a side-by-side setup please consider | Before you go for a side-by-side setup please consider | ||
# Examine possibilities to use Exclusive group data ownership | # Examine possibilities to use Exclusive group data ownership (easy) | ||
# Using docker containers | # Using docker containers (grants full application isolation) | ||
==== | ==== Server setup (Tomcat) ==== | ||
* Put WAR file in a shared location | |||
* Add descriptor file for each application in: /<tomcat>/conf/Catalina/localhost/ | |||
The file should contain a references in the codebase section | |||
<?xml version="1.0" encoding="UTF-8"?> | |||
<Context path="/TempusServa" docBase="C:/SharedApplications/TempusServa.war"> | |||
.... | |||
Note that new descriptor files can be added at runtime, and will not require a server restart. | |||
==== Handling updates ==== | |||
Updates to the application are easy | |||
# Update the .war file in the shared location | |||
# Stop the application server | |||
# Remove all folders inside /<tomcat>/webapps | |||
# Start the application server | |||
==== Saving memory ==== | ==== Saving memory ==== | ||
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Move all .jar files from the war files /WEB-INF/lib folder, except for: p2eShared.jar. | Move all .jar files from the war files /WEB-INF/lib folder, except for: p2eShared.jar. | ||
The easy way to complete this this task is to rename the .war til .zip, move the files, and rename back to .war. | The easy way to complete this this task is to rename the .war til .zip, move the files, and rename back to .war. | ||
Latest revision as of 12:55, 10 December 2021
Before you go for a side-by-side setup please consider
- Examine possibilities to use Exclusive group data ownership (easy)
- Using docker containers (grants full application isolation)
Server setup (Tomcat)
- Put WAR file in a shared location
- Add descriptor file for each application in: /<tomcat>/conf/Catalina/localhost/
The file should contain a references in the codebase section
<?xml version="1.0" encoding="UTF-8"?> <Context path="/TempusServa" docBase="C:/SharedApplications/TempusServa.war"> ....
Note that new descriptor files can be added at runtime, and will not require a server restart.
Handling updates
Updates to the application are easy
- Update the .war file in the shared location
- Stop the application server
- Remove all folders inside /<tomcat>/webapps
- Start the application server
Saving memory
Each application instance will consume 20 MB of PermGen memory (clasloader memory) if the document building functions are in use (approx. 5 mB instance if not). In order to reduce this amount to approx. 2 mB/application, all shared librarys could be moved to the webservers shared folder (Tomcat 6 is "lib").
This approach is only recommended if:
- You are running no other applications on that particular webserver (can be done)
- Sure that all applications will be using the same TS version
Move all .jar files from the war files /WEB-INF/lib folder, except for: p2eShared.jar.
The easy way to complete this this task is to rename the .war til .zip, move the files, and rename back to .war.