> ... > > to know if there is a way for all three of them to share the same disk > > space (I mean to share a partition between all of them). ... > > We do this all the time. > The easiest candidates for sharing are /opt and /usr. > By default, they get put into the root filesystem, > so you need to give them their own partitions at installtion time. > You might have three full 3390 volumes: root, /usr, and /opt. > (You will have to decide how large to make these. > If you have VM, certainly you can make them smaller.)
It's not hard to change later. Create the new volumes, mount them in the proper hierachy under (say) /root/t and then a carefully crafted tar clC/ usr var opt | tar xpC /root/t command. Note the 'l' on the LHS - you don't want tar tarring up directories not explicitly mentioned, and especially not /root/t. I've done this kind of process several times when a disk has filled and I wanted to add another, or to change partition layouts for some other reason. > Once you have installed with /opt and /usr being not part of the root, > you can COPY the root device (using something like DDR) > to another minidisk (or full pack) for each of the sharing images. > Each of the sharing Linux images will then have the same idea about > the content of /usr and /opt as the owning Linux image will have. > But each of the sharing Linux images will have its own root device. I'm sure with a little more effort you can get / in a ram disk (virtual memory) and mount each machine's personal (machinal?) version of /etc & /var. I'm assuming VM will page as much of the RAM disk out as is not often required. -- Cheers John Summerfield Microsoft's most solid OS: http://www.geocities.com/rcwoolley/ Note: mail delivered to me is deemed to be intended for me, for my disposition.
