On Aug 27, 2014, at 5:45 AM, Martin Steigerwald <mar...@lichtvoll.de> wrote:
> Hi! > > Now I get this with 3.17-rc2: > > merkaba:~> LANG=C df -hT / /home > Filesystem Type Size Used Avail Use% Mounted on > /dev/dm-5 btrfs 30G 17G 23G 43% / > /dev/dm-0 btrfs 160G 129G 59G 69% /home > > > /: 17+23 = 40 GiB, compressed 10 GiB away with lzo? > /home: 59+129 = 188 GiB, compressed 28 GiB away with lzo? > > > This is BTRFS RAID 1 on Dual SSD: > > merkaba:~> btrfs fi df / > Data, RAID1: total=25.00GiB, used=15.33GiB > System, RAID1: total=8.00MiB, used=16.00KiB > Metadata, RAID1: total=2.00GiB, used=677.33MiB > unknown, single: total=240.00MiB, used=0.00 > > merkaba:~> btrfs fi df /home > Data, RAID1: total=154.97GiB, used=125.70GiB > System, RAID1: total=32.00MiB, used=48.00KiB > Metadata, RAID1: total=5.00GiB, used=2.71GiB > unknown, single: total=512.00MiB, used=0.00 Hmm, I'm not seeing such a large discrepancy between Used+Avail and Size. No compression, all volumes populated with send/receive and contain same data. 3.16.1 # df -h Filesystem Size Used Avail Use% Mounted on /dev/sdb 40G 2.8G 37G 7% /home # single 40GB device /dev/sdc 40G 5.5G 33G 15% /mnt # two 20GB devices, raid1 Reboot 3.17.0rc2 # df -h Filesystem Size Used Avail Use% Mounted on /dev/sdb 40G 2.8G 37G 7% /home # single 40GB device /dev/sdc 20G 2.8G 17G 15% /mnt # two 20GB devices, raid1 ====== sde is two 20GB devices, raid1, -o compress, populated the same as above w/ send/receive 3.16.1 Filesystem Size Used Avail Use% Mounted on /dev/sde 40G 3.8G 35G 10% /mnt 3.17.0rc2 Filesystem Size Used Avail Use% Mounted on /dev/sde 20G 2.0G 18G 10% /mnt In the last example, Used went from 2.8G to 2.0G due to compression. But with or without compression, Used+Avail=Size. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
