On Sun, 7 Apr 2019, Michael van Elst wrote:
kab00m%lich.phys.spbu.ru@localhost (Dima Veselov) writes:If anyone knows - what is the best practice in performance and fault-tolerance - ccd or LVM?Neither is fault-tolerant, CCD only supports striping and we have only implemented striping for LVM.
You can concatentate with ccd, you don't have to stripe (a.k.a. interleave):
A ccd may be either serially concatenated or interleaved. To serially
concatenate the partitions, specify the interleave factor of 0.
If you concatenate, you may be luckier if a component fails (but as
Michael says, there's no fault-tolerance) as at least you will get large
chunks of intact filesystem rather than shredded data throughout.
Performance should be similar with CCD having slightly less CPU overhead. LVM provides much more flexibility as you can carve multiple logical volumes out of your disk system. A ccd configuration is pretty static.
-- Stephen