Re: EXT4-ish "fixes" in UBIFS

[Trenton D. Adams]

On Thu, Apr 2, 2009 at 8:45 PM, Christian Kujau <lists@xxxxxxxxxxxxxxx> wrote:
> 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.
>
> Christian.
>
> 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

lol, yep sounds about right.  Probably much worse on my machine, given
the disk speed is around 20-23M/sec.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/