On Sat, 4 Apr 2015 16:35:02 -0600 Bob Proulx <bob@proulx.com> wrote: > Petter Adsen wrote: > > Jerome BENOIT wrote: > > > Petter Adsen wrote: > > > > I am preparing to set up Jessie on my home server today, with > > > > mdadm RAID and LVM. Even though I am using LVM, I want to get > > > > the volume sizes about right when I first set them up. > > You can always expand the volume very trivially. You can't shrink it > easily however. So don't go crazy-too-large or you will have > unusuable space. A comfortable amount is fine. Here are some very > active systems of mine. In review now I could probably bump up the > space there a little bit but at the same time those haven't had space > issues ever either. I set /var much bigger, because I intend to have several VMs and containers there. But I know what images are to be stored there and how big they are, so I could figure it out pretty accurately. <snip> > > > > VM images and containers are stored under /var - is there > > > > anything else that systemd stores under /var that might take up > > > > enough space that I should be aware of when setting up? > > > > > > why not mount a dedicated partition inside /var for such usage ? > > > /var/local ? > > I mount an additional volume at /var/lib/libvirt/images in order to > handle the image sizes. Or with LVM build the VM images directly in a > logical volume. That is the recommendation for performance anyway. I rarely actually use the VMs on that machine, and I didn't want to bother converting them to logical volumes, so I just left everything in /var. This may change in the future, as I left some space in the VG mostly for this purpose. On my workstation I have now also set up LVM on a spare disk, that I intend to use mostly for VMs. So far, I have kept them as images on an SSD, so performance has been good. > > That is a possibility, but I will either: > > > > a) simply set up a /var large enough for all I need, or > > b) symlink to /srv, if necessary > > > > I am hoping to avoid symlinking, though. > > Why do you want to avoid the symlink? Just a personal preference. I just prefer instantly knowing what partition everything is on, and to me, symlinking can make things a bit "messy". I think this is related to the fact that I have Aspergers. Some things can be harder to wrap my head around. > Alternatively use a bind mount. This is what I do system. In this > example I had a large /home partition and I wanted to share the space > there. I bind mounted /home/images to /var/lib/libvirt/images. That was a good idea, I didn't think of that. Thank you. > The /etc/fstab entry: > > /home/images /var/lib/libvirt/images none bind 0 0 > > This will create an error on purge because the postrm can't remove the > directory but since we know what we did that is okay to ignore and > cleanup after the package purge. Understand and ignore it. I don't > have plans to purge the production use of this anytime soon. Just > noting it for the record. I will keep a mental note of that. > > But what I was wondering is if there is anything other than > > containers/VM images that systemd introduces in /var that takes a > > significant amount of space? > > It depends completely upon what you install. Everyone will install a Of course. :) > different set of things. As David mentioned apt-cacher-ng caches > packages and will consume in its cache up to the configured size. On > my other machine with it installed I have it using its own logical > volume. Yes, I was seriously wondering about installing apt-cache-ng. I have plenty of bandwidth, but there is absolutely no point in wasting more than I need. Will that also cache packages for other architectures? I have a Pi, running Raspbian - will it cache packages for that too, or just the multi-arch ones? > Filesystem Size Used Avail Use% Mounted on > /dev/mapper/vg1-acng 9.9G 3.3G 6.2G 35% /var/cache/apt-cacher-ng > > > BTW: Whoever came up with the ability to do parts of the installer > > via ssh - thank you, thank you, thank you! :) _Very_ convenient, I > > just hadn't actually tried it before. > > That is a pretty cool feature. It is :) Can't believe I haven't tried it before, it's so much nicer to sit at a proper workstation and do the install. Thank you for all the advice, I'm now going to carefully read the manpage on "mount" and learn more about bind mounting :) HAND! Petter -- "I'm ionized" "Are you sure?" "I'm positive."
Attachment:
pgpF6cPaDG5bA.pgp
Description: OpenPGP digital signature