On Tue, 13 Mar 2012 16:00:08 +0700 Pandu Poluan <pa...@poluan.info> wrote:
> On Tue, Mar 13, 2012 at 15:15, Canek Peláez Valdés <can...@gmail.com> > wrote: > > > > You are; but in an incredible complicated and convulted way. > > > > If I'm understanding you, you want: > > > > fstab: > > /dev/XX /mnt/p1 ... > > /dev/YY /mnt/p2 ... > > > > and then > > > > /usr/portage -> /mnt/p1 > > /usr/src -> /mnt/p2 > > > > (or using bindmounting, whatever). > > > > This makes no sense at all (at least not to me), when you can > > simply: > > > > fstab: > > /dev/XX /usr/portage ... > > /dev/YY /usr/src ... > > > > and get the same split filesystem, but without all the complication > > you are proposing. > > > > Unless there is something I don't understand, in which case I'm not > > following your reasoning. > > > > The point is: It's not just 2 (two) directories, but several of them, > and I just can't see myself creating a partition (or an LV) for each > and everyone of them. > > So, here's my thoughts: > > There are 2 filesystems that are suitable for different purposes: > * reiserfs = for space efficiency (w/o notail option) and/or no inode# > limitation > * ext4 = for general purpose > > The directories I'm going to split: > > /usr/share ==> ext4 > /usr/portage ==> reiserfs > /usr/portage/packages ==> ext4 > /usr/portage/distfiles ==> ext4 > /usr/src ==> reiserfs > /var/cache/rtorrent (don't ask) ==> reiserfs > /var/spool/postfix ==> ext4 > /var/lib/postgresql ==> ext4 > > Now, I create 2 partitions: > > /dev/sdc1 (reiserfs) --> /mnt/Persistent1 > /dev/sdd1 (ext4) --> /mnt/Persistent2 > > Then I create subdirectories: > > /mnt/Persistent1/portage > /mnt/Persistent1/src > /mnt/Persistent1/rtorrent > > /mnt/Persistent2/share > /mnt/Persistent2/packages > /mnt/Persistent2/distfiles > /mnt/Persistent2/postfix > /mnt/Persistent2/postgresql > > Finally, I need to redirect the directories-I-want-to-split to the > above subdirs under /mnt/Persistent[12] > > SO. > > mount -o bind ... or ln -s ? > > Rgds, Ah, now I see. You have many sub-directories of /usr that you don't want to be part of the same volume as /usr. This is quite valid, I can think of several lines of reasoning: - you'd rather not have the pain of dealing with many smaller filesystems even if LVM is available. - you just want a large storage area for "stuffs", and don't feel like finding out how much space each one needs - you'd rather keep the bulk of /usr static and don't growing much So instead make two big mount points in /mnt, one each for the destination filesystem types you are interested in and link the subdirectories there to the right place in /usr. You want bindmounts for that. Someone else here (I forget whom) did the same thing with his home directories and /var. It's a valid need, but rare. And nobody else understood his reasoning for a long time either :-) OT: I can't wait for the day when ZFS- and btrfs-like filesystems are the norm and we can dispense with all this physical disk, partitions, LVM, volumes, file systems and mounting nonsense. I want this model: I have X bytes of storage, I would like Y bytes to be mounted here with these charactertics, and Z bytes mounted there with those characteristics. Kernel, make it so, thanksverymuch and have a nice day -- Alan McKinnnon alan.mckin...@gmail.com
