Replication of data so that it can be dumped across filesystems and when one filesystem goes pfft, you can use the replica. How does it sound ? I know just like RAID 1 ( Redundant Array of Independent Disks ). I found ChironFS yesterday and it sounds cool. ChironFS is purely FUSE based and can replicate data across a variety of filesystems. Check it out at http://code.google.com/p/chironfs/
Anyway, let us move to my latest obsession, filesystems with Versioning. NILFS is one of these filesystems for Linux. It can do continuous snapshots ! And all you need to do is just specify epoch as an argument and pat comes the file that was existent once upon a time in so-and-so state. What’s more, you can mount any number of these snapshots at a given instant (read-only).
I didn’t need to recompile my kernel at all as NILFS comes as it comes with a loadable kernel module.
I didn’t really go to NILFS expecting a lot of surprise. I just wanted to mess with the idea of versioning that NILFS came with. Remembes, ext3-cow allows you to access the snapshot of a file as if it were in the current filesystem. NILFS however does it in a different way. I personally appreciate ext3-cow a lot more than NILFS but thats just me.
Gotta rush so bye.
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