Hi all,
I'm setting up a new lustre filesystem with 2.10.4. Things are
looking OK so far. However, I noticed that when I mount up
my MDT, df reports a smaller size than I expect. The volume is
2.2TB, but the MDT reports 1.3:
icecube-lfs6-mds-1 ~ # df -h -t lustre
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/md3420-1-vd-0 1.3T 94M 1.2T 1% /mnt/lustre/lfs6-mdt0000
It appears that the host sees the correct size for the volume:
icecube-lfs6-mds-1 ~ # fdisk -l /dev/mapper/md3420-1-vd-0
Disk /dev/mapper/md3420-1-vd-0: 2388.7 GB, 2388672905216 bytes,
4665376768 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
So I am a little confused. Seems to work OK, but I'd like
to understand what might be going on there.
I've included the commands to create the MDT below.
Any ideas?
Thanks much!
Best,
---Steve
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mkfs.lustre --fsname=lfs6 --reformat --mgs --mdt
--servicenode=lfs6-mds-1@tcp1 --servicenode=lfs6-mds-2@tcp1 --index=0
/dev/mapper/md3420-1-vd-0 >> mkfs.out
icecube-lfs6-mds-1 ~ # cat mkfs.out
Permanent disk data:
Target: lfs6:MDT0000
Index: 0
Lustre FS: lfs6
Mount type: ldiskfs
Flags: 0x1065
(MDT MGS first_time update no_primnode )
Persistent mount opts: user_xattr,errors=remount-ro
Parameters: failover.node=10.128.11.145@tcp1:10.128.11.144@tcp1
device size = 2278016MB
formatting backing filesystem ldiskfs on /dev/mapper/md3420-1-vd-0
target name lfs6:MDT0000
4k blocks 583172096
options -J size=4096 -I 1024 -i 2560 -q -O
dirdata,uninit_bg,^extents,mmp,dir_nlink,quota,huge_file,flex_bg -E
lazy_journal_init -F
mkfs_cmd = mke2fs -j -b 4096 -L lfs6:MDT0000 -J size=4096 -I 1024 -i
2560 -q -O
dirdata,uninit_bg,^extents,mmp,dir_nlink,quota,huge_file,flex_bg -E
lazy_journal_init -F /dev/mapper/md3420-1-vd-0 583172096
Writing CONFIGS/mountdata
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