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[20080826] Journaling performance (Updated)
Mathias Scheler has an interesting blog posting about the difference of using journaling on file system performance. The test he did was extracting NetBSD 4.0 sources.
  • With plain FFS, the extract took 15:19 minutes
  • With journaling, it took 3:24 minutes.
A clear winner. (No numbers with soft dependencies, though, but they can be expected to be comparable to the journaling number).

Update: Matthias has posted updated numbers that include soft dependencies. The best bet so far is still WAPBL. It's a bit slower than async mounts, but as they are VERY unsafe, that's not recommended, at all. Use WAPBL!

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Disclaimer: All opinion expressed here is purely my own. No responsibility is taken for anything.

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