Hi On 3 December 2012 15:20, David Kirkby <[email protected]> wrote:
> On 3 December 2012 11:48, Jan Groenewald <[email protected]> wrote: > > Hi > > > > I'm making an LXC-based machine to host a couple of VMs for all supported > > desktop Ubuntu versions since 12.04 as buildbot slaves for Sagemath. LXC > is > > linux virtualisation, and virtualises ABOVE the kernel level, so the same > > kernel will run for all the guest OSes. If this is a problem for > testing, I > > will also investigate KVM instead. These are Ubuntu preferred solutions, > so > > I will rather work with either of those. > > If I understand you correctly, you are ensureing the kernel version of > the host is greater than the guest - am I correct? I can't see the > point in worrying about that at all. The host can be a completely > different operating system to the guest. I run all my virtual machine > (Linux and Windows) with a host that is Solaris. 77 > No, I was going to run Linux-only virtualisation. I was intending to use the Long Term Support version for the host, with therefore an older kernel than all the newer guest versions coming out and being virtualised on that as they are released. As I understood containers, the host and kernel version has to be the same -- that's what containers are, they virtualise ABOVE the kernel level and share the kernel. http://www.ibm.com/developerworks/linux/library/l-lxc-containers/ (I do see now I will have to have separate 32bit and 64bit hosts, but I can run LXC inside KVM for each). >Is 1G memory enough to build Sage? I've just tried it on virtualbox on a > 1G > > host and only this failed, but after running ./sage -docbuild reference > html > > --mathjax it passed. > > > I don't think 1 GB is sufficient. I've seen figures like 2.5 GB being > needed to build the documentation. It must depend to a certain exent > on exactly what else is running on the system. If you have very > limited RAM, you will probably want to turn off anything not absoluety > essentail - sendmail etc. > This was a fairly minimal system. This is a huge minimum build requirement. What is the minimum RAM size of all the current buildbot slaves? > > I have an 8G machine and would like to put 6 virtual guests on there: > > 12.04.1 32bit and 64bit, 12.10 32bit and 64bit, 13.04 (development) 32bit > > and 64bit; and to keep 2G to do PPA building on the host. > > I think you will fail with that. Each guest needs a bit of overhead. I > don't know how much that will be, but I would be surprised if it < 80 > MB > OK, how about 3x2G guests on a 8G machine. Regards, Jan -- .~. /V\ Jan Groenewald /( )\ www.aims.ac.za ^^-^^ -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-devel?hl=en.
