Instead of further hijacking a specific question about call recording, I'll start a new thread...
It's common to have more than one FS media server to handle calls. So then, you'll have them handling voicemail too.
How do you ensure that the voicemail will be available for the user? Surely this is a common thing!
Some options present themselves:
1) Ensure that each user always connects to the same server (this make maintenance impossible if the VM is only on one machine!)
2) Mount the VM directory to point to Amazon S3 (this doesn't sound ideal. Perhaps for long-term archival -- if you allow such a thing -- and seemingly the network connection could be a problem)
3) Some sort of NFS - but then this become a single point of failure?
4) Some sort of network drive that has multiple copies of the file, and it could even be local -- suggestions? Gluster? I've never used any. This would be transparent to FS.
5) couchdb, riak, (rethinkdb) (effectively) have multi-master replication/multiple sharding, but FS doesn't know how to access that. (In couchdb it's not a shard, it would be a full copy. The others configure a multiple of copies that are available)
5) Abaci suggested possibly record_post_process_exec_api or if it's not in VM that you can probably add a var in mod_voicemail.c to the file_path and use that var in the post_process api/app. Then, you trigger whatever "Copy" script to the NFS.
6) Jay Binks suggest
http://code.google.com/p/lsyncd/ or using inotify directly, but it sounds like you need to establish a watch per folder, and simply - it's a hack. This should be something that can be triggered (if not fully handled) in FS itself.
What are people currently doing to "share" voicemail? Can we work out some sort of recipe to easily implement #4 (or #5)?