Hi William, Is it possible to access beta code and git branches from SMC?
Last Year I was running calculations on the combinat server using some private git branches. Once I have brushed up the code a little I'd like to start these again. I can certainly push this code to trac but it will be a while before it is ready for review as I'll have a busy year. Andrew On Sunday, 4 January 2015 15:23:56 UTC+11, William Stein wrote: > > Hi, > > The computer combinat.math.washington.edu is down... again. Sort of. > It responds to ping requests, but I can't ssh in. > > I suspect that not a lot of people are actively using it lately, since > this is the second time it has gone down for over a week in the last 3 > months, and nobody (except my student Hao Chen), seems to have > noticed. > > I'm considering doing the following. I'll shutdown combinat > completely, reformat the disk, and set it up as a node of the > cloud.sagemath.com (SMC). It'll still have the amazing 64 cores and > huge (192GB) RAM. However, instead of login in directly to it, people > can email me to request that I move a particular SMC project to > combinat. It will then have access to expanded compute resources. > The advantage of this, is that it is much easier for me to maintain. > In particular, SMC has automated scripts to take care of using cgroups > to explicitly limit usage of compute resources by a given project, I > have extensive monitoring code in place so I know when things go down, > and I everything runs in virtual machines, so when there are problems > I can easily fix them in a few minutes remotely. Also, it's much > easier to grant fair usage to projects. As it is now with default > linux on combinat, basically any user can just bring down the computer > by using too much memory/disk/whatever, which is probably what > happened in this case (I don't know). > > Thoughts? > > Obviously, this may be a bit slower and the max memory will be less > (as things are in a VM) for specific research-level computations. > However, a working computer is way better than a regularly-crashing > computer, in my opinion. Also, given the weeks of downtime that > nobody (except Hao) notices, maybe people aren't using combinat at all > anyways, due to it being only a remote linux box. Personally, I > think SMC makes using remote Linux boxes much easier. > > -- William > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel. For more options, visit https://groups.google.com/d/optout.
