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SubjectRe: EXT4-ish "fixes" in UBIFS
On Thu, 2 Apr 2009, Theodore Tso wrote:
> It will, but you might not like the performance.... the reason why
> it's there is that some users might want the particular tradeoff, but
> it probably wouldn't make a good default.

Thanks for confirming this. Yes, I know about the performance impact, but
perhaps it's feasible for some setups.


PS: I was curious *how* bad the impact was and so I tried generating a
477 MB tarball, first on an async, then on an sync mounted partition:

/dev/md0 /mnt/md0 ext4 rw,noatime,barrier=1,data=ordered
$ time tar -cf /mnt/md0/test.tar /usr
real 1m36.615s

/dev/md0 /mnt/md0 ext4 rw,sync,noatime,barrier=1,data=ordered
$ time tar -cf /mnt/md0/test.tar /usr
real 5m23.793s

Bruce Schneier does not get kidney stones. He gets Rosetta Stones.

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