Hi Fajar,
I believe the link you posted refers to the older implementations of lvm
snapshots which has serious performance degradation. There is a newer
implementation based on thin-provisiong device-mapper which seems quite
promising, which is also blocked based afaik.
It doesn't test I/O performance but anyway interesting read (concerns
docker):
http://developerblog.redhat.com/2014/09/30/overview-storage-scalability-docker/
One problem I have with them is that there are not directly usable with
unprivileged containers. LVM operations need to be done by root or
setcaps has to be changed.
ingvar
Am 30.06.15 um 13:17 schrieb Fajar A. Nugraha:
I'm using ubuntu + zfs.
Overlayfs has been part of mainline kernel since 3.18 (F22 uses
4.0.6). Latest overlayfs only works on top of ext4, so it's suitable
if you don't want to reformat your existing fs. However using a union
mount like overlayfs means you need to deal with its overhead (which
includes a whole file is copied even if you only modify a small part
of it).
Btrfs is in active development, but seems to be the choice of many
linux devs (including systemd developers).
There seems to be performance issues with LVM snapshot (e.g.
http://www.nikhef.nl/~dennisvd/lvmcrap.html)
Choose whichever works best for you, do your own tests to make sure it
performs within reasonable limits.
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