If you provide the "zpool list -v" output it might give us a little
clearer view of what you have going on.
Chris
On 08/19/2015 06:18 AM, Götz Waschk wrote:
Dear Lustre experts,
I have configured two different Lustre instances, both using Lustre
2.5.3, one with ldiskfs on RAID-6 hardware RAID and one using ZFS and
RAID-Z2, using the same type of hardware. I was wondering, why I 24 TB
less space available, when I should have the same amount of parity
used:
# lfs df
UUID 1K-blocks Used Available Use% Mounted on
fs19-MDT0000_UUID 50322916 472696 46494784 1%
/testlustre/fs19[MDT:0]
fs19-OST0000_UUID 51923288320 12672 51923273600 0%
/testlustre/fs19[OST:0]
fs19-OST0001_UUID 51923288320 12672 51923273600 0%
/testlustre/fs19[OST:1]
fs19-OST0002_UUID 51923288320 12672 51923273600 0%
/testlustre/fs19[OST:2]
fs19-OST0003_UUID 51923288320 12672 51923273600 0%
/testlustre/fs19[OST:3]
filesystem summary: 207693153280 50688 207693094400 0% /testlustre/fs19
UUID 1K-blocks Used Available Use% Mounted on
fs18-MDT0000_UUID 47177700 482152 43550028 1%
/lustre/fs18[MDT:0]
fs18-OST0000_UUID 58387106064 6014088200 49452733560 11%
/lustre/fs18[OST:0]
fs18-OST0001_UUID 58387106064 5919753028 49547068928 11%
/lustre/fs18[OST:1]
fs18-OST0002_UUID 58387106064 5944542316 49522279640 11%
/lustre/fs18[OST:2]
fs18-OST0003_UUID 58387106064 5906712004 49560109952 11%
/lustre/fs18[OST:3]
filesystem summary: 233548424256 23785095548 198082192080 11% /lustre/fs18
fs18 is using ldiskfs, while fs19 is ZFS:
# zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
lustre-ost1 65T 18,1M 65,0T 0% 1.00x ONLINE -
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
lustre-ost1 13,6M 48,7T 311K /lustre-ost1
lustre-ost1/ost1 12,4M 48,7T 12,4M /lustre-ost1/ost1
Any idea on why my 6TB per OST went?
Regards, Götz Waschk
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