Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

 

 

Section
Column

 supports clustered form servers for both high availability, load balancing and fault tolerance. The software can be installed and configured either as a stand-alone single form server or as a cluster of form servers behind an load balancer.

Info

NOTE that only certain version include clustering. Please refer to the Release Notes for details.

A Form Server Cluster is instrumental in heavy load scenarios where a single form server cannot handle the load alone. Clustering also enables fault tolerance should one node fail for either design time or use mode forms. If one form server is shutdown the form instances automatically get transferred to another running form server node.

 supports clusters running under either Apache web servers or Oracle Web Logic servers. This chapter details how to enable a  cluster running under an Apache web server.

Column
width300px

On this page: 

Table of Contents
maxLevel2

 

...

Blah Blah Blah... Work in Progress!!!!!

Special Considerations

Upload Control

The upload control is not currently fault tolerant. Uploaded file attachments are only stored with the node that processed the upload. If the node that is processing your form instance shuts down, all attachments are lost. The user will notice this only If the user refreshes the form or tries to add/delete another attachment. In this case the upload control is refreshed and the current state of all prior attachments having been removed becomes visible. If the user does not refresh the form or add/delete another attachment the form will continue to show the lost attachments. However when the form is submitted they will not be part of the submission. This out of sync behavior will be addressed in a future software update.

...