I'm looking for a file system suited for my storage task, which is to store between 300 and 400 gigs of media data, i.e. video, sound and pictures.
The data will be stored on a non-SSD drive which will be used only for that data, i.e. boot time on the file system is a non-issue. The surrounding system will be running Debian (or, in the future, maybe some other Linux).
I don't think I can feed the file system data faster than the network can deliver it, so write speeds probably don't need to exceed 1-10 MB/s for the foreseeable future. Also, I suspect that writes will be fairly infrequent, so I might like to mount the partition read-only and then remount when I want to write.
Primarily I want to read at 1 x speed, i.e. read one second's worth of video in one second, though I might like to seek also; I don't know enough about video formats to understand what kind of throughput this requires. I suspect it requires that an index of key frames are in RAM and that it is cheap to jump to any disk block which contains a key frame (i.e. it's in RAM too); on top of this, the disk plus file system must be able to stream video data at 1 x speed starting with only the key frame block in RAM.
The videos are private so I would like to encrypt the data. Also, I would hate to lose any of the videos; given that my throughput requirements are low, I'm willing to sacrifice performance for stability. Naturally, since video formats already compress the data, I don't care about support for file system level compression. The way my home is configured, there's a moderate to high risk that I hit the power switch by accident and I have no UPS.
Have I understood correctly what I should look for in a file system primarily meant for storing and accessing video data? In particular, if you have used a storage system for media data, what surprised you the most? What did you learn on the way that you couldn't have foreseen? What can I learn from your experience?
Assuming that encryption support, rock solid stability and moderate performance are the criteria by which I really want to evaluate file systems, do you know which file system would be best in my situation? Do you know of any relevant data about this issue?