On 4-4-14 10:02:27 Swâmi Petaramesh wrote:
> However I'm still concerned with chronic BTRFS dreadful performance
> and still find that BRTFS degrades much over time even with periodic
> defrag and "best practices" etc.
Yeah, I have experienced this, too. I can't say what your experience
was, but mine was all about copy-on-write along with two applications:
akonadi and Web browsers.
I no longer see the slow degradation over time because I made the
following directories recursively nodatacow:
.local/share/akonadi
.cache/google-chrome/Default
.cache/mozilla/firefox/ogtorq5r.default
To do that, I had to copy[*] all of the existing files in those
hierarchies after chattr +C on the directories.
Using btrfs on my home directory has been fine ever since.
______________
[*] Examining my shell history turned up this snippet from that time:
for i in 0 1 2 3;do
mv data_$i data_$i.t
touch data_$i
chattr +C data_$i
cp data_$i.t data_$i
rm data_$i.t
done
I carefully walked all the directories, while none of the applications
above were running, converting all of the files to +C. It took a
while as I remember. :-)
--
Garry T. Williams
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
