Debian/Wheezy userspace can't be expected to work as well as desired with a 3.19 kernel. Wheezy with BTRFS single or RAID1-1 works reasonably well as long as you have lots of free space, balance it regularly, and configure it not to resume a balance on reboot. Debian/Jessie works well with BTRFS single or RAID-1 without any issues. But don't use RAID 5/6. Jessie userspace should work well with 3.19 and 4.0 kernels. On March 23, 2015 4:38:49 AM GMT+11:00, Hugo Mills <hugo@xxxxxxxxxxxxx> wrote: >On Sun, Mar 22, 2015 at 05:30:59PM +0000, scruffters wrote: >> Hello list, >> >> I wondered if anybody could advise on the status of using fstrim with >> BTRFS. The motivation for me is to finally try using SSD's in a R5 >> style configuration with some way of running maintenance overnight to >> maintain performance... >[snip] >> My kernel is 3.2.0-4 (Debian Wheezy). > > Then you shouldn't use btrfs RAID-5 at all, and probably shouldn't >be using btrfs. > > For parity RAID, 3.19 or later is what you should be using, as it >supports recovery and rebuild. You can get those kernels from the >Debian experimental repo. If you're not using parity RAID, then the >last few kernels have been OK, but keeping up with the latest version >is still a reasonably good idea. > > Hugo. -- Sent from my Samsung Galaxy Note 3 with K-9 Mail. -- 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
