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Lot of thanks! Best, -- Arthur Sherman +972-52-4878851 http://www.cpt.co.il/ > -----Original Message----- > From: Platform Independent Linux List! > [mailto:[log in to unmask]] On Behalf Of Daniel Franke > Sent: Tuesday, March 06, 2007 1:27 AM > To: [log in to unmask] > Subject: Re: /dev/shm > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Sun, Mar 04, 2007 at 11:29:44PM +0200, Arthur Sherman wrote: > > This is a bit farer than I ment to go :) , but it sounds > interesting. > > I'll give it a try in my leisure time. > > > > BTW, how changes, such as to mysql db or new virus defs, > would be saved in > > this image? > > How do you create such image and load it at a boot time? > > For the database you can use MySQL Cluster: > > http://mysql.com/products/database/cluster > > You build a network of database servers which operate > strictly out of main > memory, with automatic failover if some servers go down. > Obviously you > should make occasional backups in case they all go down at once. > > For virus defs, have your bootscripts download and install the latest > definitions when you boot up. Start over with a new image > when the download > gets unwieldly. > > To set it all up: > > 1. Create and mount a loopback filesystem that's no bigger > than your RAM. > > 2. Do a minimal install of your favorite distro onto the loopback > FS (use debootstrap for Debian or something analogous for others > distros) plus whatever software you need to run on the server. > > 3. Chroot into it, configure everything the way you want it, > and add the > logic I mentioned above into the boot scripts. > > 4. Set up an initrd which creates a ramdisk (this is > different from tmpfs, > see /usr/src/linux/Documentation/ramdisk.txt) the same size > as your loopback > fs, dds the loopback image onto the ramdisk, mounts it, and > then pivot_roots > to it. > > 5. Add an appropriate initrd= option to your kernel command line. > > This will all take some doing! Don't expect much help from > your distro. > I suggest using Slackware because it will stay out of your > way. You might > want to practice all this in VMWare before you start ripping > the guts out > of a production box. > > - -- > Daniel Franke [log in to unmask] http://www.dfranke.us > |----| =|\ \\\\ > || * | -|-\--------- Man is free at the instant he wants to be. > - -----| =| \ /// --Voltaire > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.6 (GNU/Linux) > > iD8DBQFF7KdTKTA17JAC/eYRApPVAJ9aY8kyTRRTg7Do5rOHIBEdFK4/1QCcDi0J > +h024eNAx8GnaYw5kRONkig= > =/DeQ > -----END PGP SIGNATURE----- >