On 11/09/2011 12:12 AM, Chris Mason wrote:
On Tue, Nov 08, 2011 at 10:01:51AM -0500, Chris Mason wrote:
On Tue, Nov 08, 2011 at 11:00:42AM +0900, dima wrote:
On 11/08/2011 10:54 AM, Eric Griffith wrote:
On 11/7/2011 8:52 PM, Fajar A. Nugraha wrote:
On Tue, Nov 8, 2011 at 8:06 AM, Eric Griffith<egriffith92@xxxxxxxxx>
wrote:
Edit your
fstab, remove the compress flag, reboot. Tell btrfs to rebalance the
system,
reboot again. And I -THINK- that'll decompress all the files
I think the original question was how to force uncompressed mode,
whether specific to a file or to a whole filesystem, without having to
reboot :)
AFAIK there's no way to do that.
Whoops! Misunderstood the question haha. Yeah, as far as decompressing
just a single file; from what I've read, thats impossible.
Eric, Fajar,
Thanks. Understood.
Yes, it is possible to remove the compress flag from fstab, reboot
and even do not do any defragmentation/rebalancing - just re-save
the file and it will be saved uncompressed. This works. But only
with reboot...
chattr -c on the file should work (followed by defrag or rewriting the
file). I just retested and it seems to be broken right now.
I'll track it down.
Ok, I had forgotten. chattr -c clears the compression flag bug doesn't
set the no compress flag. We looks like we need to patch chattr for
this.
-chris
Just for the record - I could find a solution thanks to the btrfs wiki
being online again. In Gotchas it says
mount -o nodatacow also disables compression
and indeed it does. Remounting with this option and re-saving the file
makes it uncompressed. However, I could not find how to remount the
filesystem afterwards without nodatacow.
~dima
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