The 2006 Linux Filesystems Workshop (Part III)
Posted Jul 6, 2006 23:11 UTC (Thu) by vaurora
In reply to: The 2006 Linux Filesystems Workshop (Part III)
Parent article: The 2006 Linux Filesystems Workshop (Part III)
To expand on Arjan's reply, it's not obvious that it would increase the probability of any failure. Sure, there are a larger number of individual bitmaps, but in terms of bits on disk, they are still the same size and shouldn't have an increased likelihood of suffering an I/O error. More superblocks is interesting because they are fixed size per file system; on the other hand, most modern file systems already heavily replicate the superblock. What does seem to be true is that this scheme will limit the effect of any individual failure, as long as we are smart about handling loss of path components.
We definitely appreciate criticism as we would like to figure out (possible fatal) errors BEFORE implementing anything. So if you have any more ideas about how this will fail, let us know and hopefully we can figure something out.
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