> Hi Tovis! > > I haven't figured out a way to do it using AuFS without moving /var, > but AFAIK overlayfs does what you want. It's included in Ubuntu > Oneiric kernel, but I'm not sure about Debian. > > I'm looking for a way to do it without overlayfs requirement myself, > if you find one, please let me know! > > Well, of course there are FUSE-based solutions, I've described one in > a blog post: > http://shnatsel.blogspot.com/2011/11/miniwheatfs-aka-reliable-ramdisks.html > > unionfs-fuse might work for you, I've managed to make it mount over > non-empty dirs and it seems to work fine, but, as the name implies, > it's very slow. However, in your case the USB drive can be even > slower... try something like this: > > unionfs-fuse -o cow,max_files=32768 -o allow_other,nonempty,dev > "/tmp/var"=RW:"/var"=RO "/var" > > -- > Sergey "Shnatsel" Davidoff > > Hi Sergej! Thanks for your answer. unionfs-fuse ... yes it is exist in Debian (as backport). Why two separate "-o" option group? The branch(?) is "/tmp/var"=RW:"/var"=RO "/var" mean that /tmp/var (which is created at /tmp which is a tmpfs - ramdisk) as writable and it is branch over /var which is read only. My interpretation is correct? > I haven't figured out a way to do it using AuFS without moving /var, What is that mean? Moving /var, basically possible only after mount root file system, which includes it. Suggestion about unionfs (I have got from hup.hu) is working if I copy some part of /var to place for rw area for /var. The translation: You should make a script which is should run first at the start (rcS.d/S00unionfs), and it should do the next:
- create a ramdisk mount -nt tmpfs tmpfs /mnt/tmpfs - copy/create appropriate directories: tar -xzf /etc/unionfs/var.tar.gz - and create a union mount: mount -t unionfs unionfs /var -o dirs=/mnt/tmpfs:/var Many places I have read that aufs could do the same things. It is not true for my situation? Sincerely tovis ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d
