On Mar 13, 2012 2:42 PM, "Canek Peláez Valdés" <[email protected]> wrote: > > On Tue, Mar 13, 2012 at 3:00 AM, Pandu Poluan <[email protected]> wrote: > > On Tue, Mar 13, 2012 at 15:15, Canek Peláez Valdés <[email protected]> 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 ? > > OK, now I understand. I still think is kinda crazy, but to each its own. > > I would definitely use symlinks. > > Regards. > -- > Canek Peláez Valdés > Posgrado en Ciencia e Ingeniería de la Computación > Universidad Nacional Autónoma de México >
For critically performance wise, I think bindmounts would do better because it is done at kernel level whereas symlinks will have to be resolved on access, no dobut a kernel maintains cache but I can't really say much about it because I don't know the code behind either. -- Nilesh Govindrajan http://nileshgr.com
