On 06/17/2011 08:58 PM, lostnihilist wrote: > > I have just started using aufs. I'm running it on a fresh, minimal install > of Debian stable. I'm mount 3 ext4 formatted drives as rw with the > following > line in my fstab: > > aufs /mnt/all aufs > > nodev,create=mfs:600,br:/mnt/.hidden/2Ka=rw:/mnt/.hidden/2Kb=rw:/mnt/.hidden > /taft=rw 0 0 > > $ uname -a > > Linux rawls 2.6.32-5-amd64 #1 SMP Wed May 18 23:13:22 UTC 2011 x86_64 > GNU/Linux >
Just curious... why are you doing this? I mean... why use aufs for this instead of LVM or RAID0? > I'm not running much in the way of software at this point. I sshfs in to > the > machine to access the files locally and am running rtorrent. I noticed the > data corruption with rtorrent. I've replicated the corruption several times > now using these steps: > > 1) Download new data in rtorrent, write directly to the aufs. > > 2) Shutdown rtorrent > > 3) Reboot system > > 4) That previously downloaded data no longer passes a hash check. > > The data is NOT corrupted before the shutdown, only afterwards. > > After the failed hashcheck, if I redownload the data and reboot again, it > is > re-corrupted. > > Furthermore, I noticed a significant amount of swapping (on a machine with > 8 > gigs of RAM and not much running on it). I don't know if this might have > something to do with rtorrent's use of mmap and aufs. > > Is there a known problem with using rtorrent and/or mmap and aufs? Is this > an unsafe way to be using aufs? Note that not all writes are being > corrupted. I rsynced about 300 GB of data to the 3 drives, and that data > appears to have maintained its integrity. > > I'd really like to be able to use aufs to union these file-systems > together. > I really appreciate the round-robin writes. > If you just want to merge the space of the three filesystems I think you have better alternatives for this task: LVM or RAID0 ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev
