I need to develop an CMS, all the system include HTML Editor, Upload, content Management similar to WordPress.
The question is, the memory usage in this case is very big?
The applet has a good performance if its big?
An applet would be a very unusual choice for this. CMSes and blogs (like WordPress) are mostly server applications, and as such they'd usually be implemented as web apps. Is there a particular reason you don't want to use an existing open source CMS like Alfresco, OpenCMS, or Magnolia?
Alfresco seems to be more of document management rather than CMS. The other commonly referred java based CMS tools are OpenCMS, Magnolia, infoglue, MMBase.
There are many articles comparing these. But when it comes to the operational aspects, information is hard to find. I am trying to find a best practice on content management in a clustered environment. For example, can one CMS server serve contents to four instances of a webapp?