Today I had a chance to compare ext3 and XFS overhead. Basically, I
created a new XFS filesystem and copied a bunch of data onto it. Then I
created an ext3 filesystem and copied everything from the XFS filesystem
onto it. Most files were under 15M in size. I didn't compare performance
because all I cared about was space efficiency. Count me as another XFS
fan.
/dev/simplicity/scratch mounted on /mnt is ext3
/dev/simplicity/mirror mounted on /data/mirror is xfs
$ df -h /mnt/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/simplicity-scratch
6.4G 5.8G 348M 95% /mnt
$ df -h /data/mirror/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/simplicity-mirror
6.5G 5.6G 913M 87% /data/mirror
--- Logical volume ---
LV Name /dev/simplicity/scratch
VG Name simplicity
LV UUID cH3Iu4-oE1k-NoPV-cfBd-t7fU-oKIX-vcq083
LV Write Access read/write
LV Status available
# open 1
LV Size 6.50 GB
Current LE 208
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:6
--- Logical volume ---
LV Name /dev/simplicity/mirror
VG Name simplicity
LV UUID ULZz2r-PUct-mysE-0uHn-bs1Q-4Uvt-2C3Ffj
LV Write Access read/write
LV Status available
# open 1
LV Size 6.50 GB
Current LE 208
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:7
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