Martin posted on Tue, 25 Mar 2014 00:57:05 + as excerpted:
https://btrfs.wiki.kernel.org/index.php/Mount_options
autodefrag (since [kernel] 3.0)
Will detect random writes into existing files and kick off background
defragging. It is well suited to bdb or sqlite databases, but not
Just an idea:
btrfs Problem:
I've had two systems die with huge load factors 100(!) for the case
where a user program has unexpected to me been doing 'database'-like
operations and caused multiple files to become heavily fragmented. The
system eventually dies when data cannot be added to the
Martin posted on Mon, 24 Mar 2014 19:47:34 + as excerpted:
Possible fix:
btrfs checks the ratio of filesize versus number of fragments and for a
bad ratio either: [...]
3: Automatically defragments the file.
See the autodefrag mount option.
=:^)
--
Duncan - List replies preferred.
On 24/03/14 20:19, Duncan wrote:
Martin posted on Mon, 24 Mar 2014 19:47:34 + as excerpted:
Possible fix:
btrfs checks the ratio of filesize versus number of fragments and for a
bad ratio either: [...]
3: Automatically defragments the file.
See the autodefrag mount option.
=:^)
