"Write once only but read many" filesystem

[Peter Teoh]

For reasons of auditability/accountability, I would like a filesystem 
such that I can write to it only ONCE, subsequently not 
modifiable/deletable, but always readable.   Kind of a database journal 
logs - it is continuously being written, sequentiall appending, but not 
circular buffer based, so that upon running out of space, logging will 
be paused in memory, and after new storage devices added to it, it will 
continue to flush out whatever is outstanding in memory.

Can ext3 / ext4 or current jbd2 be easily configured to serve this purpose?

Thanks.