On Mon, September 8, 2014 9:44 am, Les Mikesell wrote: > On Mon, Sep 8, 2014 at 3:38 AM, Mihamina Rakotomandimby > <mihamina.rakotomandimby at rktmb.org> wrote: >>> >>> If you have 1.000 or 10.000 machines it*is* a reason to >>> think about every fucking dollar per machine you can save each month. >> >> You could *just* *install* with 1GB and then get down to 512 at runtime. >> > > First, if you are running 10,000 machines with 512K RAM, you are doing > something really, really weird or you just like managing a lot of > machines that can't do very much each - and supplying a lot more power > than you would need for fewer, more capable hosts. > > But, if you have even more than a few, you are probably already doing > some sort of image installs. So just install on a machine or VM with > 1GB, then use ReaR or Clonezilla to back it up and restore onto the > target boxes. Or for brute force, use dd to copy the drive and swap > them into place. ... which will be a lot of drive swapping for 1000 or 10000 machines. With this number of machines the only workable option I can think of is netboot + kickstart (with hard drive then network boot order in BIOS so no need to change anything after system is installed)... But it is true what was mentioned 1000+ weak machines are unlikely to be able to pay their electric bills. > > -- > Les Mikesell > lesmikesell at gmail.com > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++