On Mon, Feb 7, 2011 at 10:21 AM, Jason Grout <[email protected]> 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
