JCS disk only and expiration config question

[JavaWebDev]

I'm new to using JCS and have some questions regarding configuring it 
the way I want.

First. The user and dev mailing lists haven't been active lately and the 
wiki seemed outdated in some sections. (ex: no longer a .commons 
package). Is JCS still being worked on? I chose it because it seems 
faster than ehcache and I need the disk cache to persist across servlet 
container restarts.

Ideally I'd like to write cache to disk immediately in case the servlet 
crashes without being able to call dispose(). Should I set MaxObjects to 
0 in the region definition of cache.ccf?

I'd like the objects in disk cache to expire after 7 days. Which 
configuration parameter(s) do I need to change?

Thanks.