On 23/12/14 23:28, Stefan G. Weichinger wrote: > Am 23.12.2014 um 16:25 schrieb Tomas Mozes: > >> I tried the filesystem with kernel 3.7 a year ago (to export distfiles >> to several machines). Since it's kernel based a bug caused my system to >> reboot and sadly it was a database. However the project mentioned that >> the filesystem wasn't production ready that time. Never tried the object >> storage though. > > cephfs still is mentioned as kind of beta in most of the talks I saw on > youtube. > > I am going to try the object store ... and I am interested in using it > with qemu/kvm. > > S > >
Tried that (qemu/kvm mostly gentoo VM's up to 64G) ... gave up as it was too slow/unstable with the hardware I had. You need a 10G network and a much larger number of hosts than 3 to do serious I/O. I do think its something that is only practical with a datacentre sized installation. Using it for VM images was very slow and unstable - I did use btrfs under it and not xfs (the recommended for production?) - moved to pure btrfs and its is SO much better :) Rebuilding it every few weeks and having to keep backups of a couple of terrabytes of disposable data because rebuilding was so slow was the last straw ... What I would like (and what I was looking at ceph to do) was a distributable (across a relatively slow WAN) synced file system that placed only data in use close to the host using it - will have to get back to it one day.
