Re: [sage-support] sagenb.org server(s)
This is a such a big problem that a conference recently was dedicated to fixing it. Sometime this year there should be a new notebook system designed for dealing with lots of users. There are alternative notebook servers such as http://alpha.sagenb.org, but I don't recommend telling 75 students to use it. The notebook was not designed to be used by many users at once. So I recommend waiting until it gets redesigned for scalability. On Mon, Feb 7, 2011 at 9:59 AM, Thomas Scofield scofi...@calvin.edu wrote: I've spent the last couple of hours frustrated at trying to log in and use notebooks at sagenb.org. I was attempting to do this while teaching a class, and had little to no success between 10:30 and 12:20 EST (U.S.). I had this same experience about a month ago when teaching a different class---probably can write off 75 students or thereabouts as having seen enough frustration in an hour to never want to use Sage again. Nevertheless, I've found remarkably few (given my 2-for-2 batting average) messages like this in the list archives over the last year. Is this not a problem for others, just me doing something wrong? If so, can someone help me diagnose the problem? If it's a consistent problem that everyone else has become so accustomed to that we just don't speak of it anymore, then how can it be addressed? I'd suggest to my students that they should all download a copy if it weren't that so many of them are Windows users, and that looks to be oppressively hard. If I could convince the IT people at my institution to run a notebook server, what could I tell them about numbers and power? Just what are the specs on existing sagenb servers, and how many users before you notice poor performance? Thomas L. Scofield Associate Professor Department of Mathematics and Statistics Calvin College -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] sagenb.org server(s)
Same here. I've just about given up on SageNB due to availability problems. A few times I tried to give a demo to sing praises of Sagenb, couldn't log on. Not good.Alpha seems better, but is there a way to mover over/sync your notebooks from the main server?Thanks,-d -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] sagenb.org server(s)
Hi, Could somebody suggest a message i can post at sagenb.org (next to the login box) explaining the situation? On Monday, February 7, 2011, Robert Bradshaw rober...@math.washington.edu wrote: On Mon, Feb 7, 2011 at 10:21 AM, Jason Grout jason-s...@creativetrax.com wrote: On 2/7/11 11:59 AM, Thomas Scofield wrote: I've spent the last couple of hours frustrated at trying to log in and use notebooks at sagenb.org. I was attempting to do this while teaching a class, and had little to no success between 10:30 and 12:20 EST (U.S.). I had this same experience about a month ago when teaching a different class---probably can write off 75 students or thereabouts as having seen enough frustration in an hour to never want to use Sage again. Nevertheless, I've found remarkably few (given my 2-for-2 batting average) messages like this in the list archives over the last year. Is this not a problem for others, just me doing something wrong? If so, can someone help me diagnose the problem? If it's a consistent problem that everyone else has become so accustomed to that we just don't speak of it anymore, then how can it be addressed? I'd suggest to my students that they should all download a copy if it weren't that so many of them are Windows users, and that looks to be oppressively hard. If I could convince the IT people at my institution to run a notebook server, what could I tell them about numbers and power? Just what are the specs on existing sagenb servers, and how many users before you notice poor performance? I too have noticed sagenb.org being slow or down quite a bit recently. My personal work-around has been to use demo.sagenb.org or our school Sage server for my classes. We have a Dell PowerEdge 2900 server (i.e., probably 5-6 years old) with 16 gig of RAM, and I have noticed no problems serving my classes (3 classes, probably 80 students total). We probably don't need that much RAM to serve just these students, but we also use the server for research work. You can see instructions from our setup here: http://wiki.sagemath.org/SageServer. My guess is that about 50-60 simultaneous users (not accounts, but simultaneous users) is enough to cause a severe slowdown to sagenb.org. That's a guess, though; I'm not sure what the actual number is. As for the future: In January, we held a Sage conference in which many people worked on designing a much more scalable notebook. I am working with a group of students on the first steps of this rewrite. There are other people also working on this rewrite or other projects which restructure the notebook and make it more scalable. There is funding from an NSF grant to work on making the notebook more scalable, so it will get done (i.e., there's funding and committed developer time). One project (the rewrite to use flask) is at the testing stage, so hopefully we will see it go into Sage soon. Sage is a victim of its own success! In response to the original poster, this is a big pain point and something several people are working on. - Robert -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] sagenb.org server(s)
Nevertheless, I've found remarkably few (given my 2-for-2 batting average) messages like this in the list archives over the last year. Is this not a problem for others, just me doing something wrong? I have had a lot of lag on the sage servers this past semester. However, I cannot say if its a problem in my school's network which is notorious for lag So, I switched to using the binaries for Ubuntu. I gave every one of my students a copy of the binary and we are using that instead this semester. So far, all is going well! HTH, A. Jorge Garcia Applied Math and CompSci http://shadowfaxrant.blogspot.com http://www.youtube.com/calcpage2009 -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
