On Tue, Nov 15, 2011 at 8:44 PM, Dan Drake <dr...@kaist.edu> wrote: > On Tue, 15 Nov 2011 at 07:59PM -0800, William Stein wrote: >> To build, I had to install these packages: >> >> yum install gcc emacs make screen gcc-c++ gcc-gfortran > > You need emacs to build Sage? Wow, emacs really *is* an operating > system...!
*I* need emacs to build Sage. Heck, I need it to breath. >> The build literally took *4 DAYS* to complete (!). However, >> everything built fine with no problems. I hope it took so long due >> to swap being slow, and not Amazon's EC2's being really slow, but I >> don't know. The EC2 virtual disks seem fast -- startup time is very >> good, for example and compute benchmarks like "factorial(10^7)" are >> basically the same on sage.math as EC2. I'm guessing the build would >> be a lot faster with a non-free EC2 virtual machine that has more RAM. > > I recall that the Amazon guy who built Sage on EC2 used a much more > powerful node and got it to build in 70 minutes or so. I think it's just > your swap file. But that's just my guess. You're alluding to this: http://www.jeff-barr.com/?p=1595 He does claim 75 minutes. I'm shocked by 75 minutes versus 5760 hours. It's surprising to me that it literally takes over 75 times as long... >> I have not been able to get the notebook server to work at all yet >> though, perhaps due to some firewalling by Amazon that I haven't >> figured out how to disable yet. > > That would be *great* if we can run a notebook server on EC2. Even the > current notebook would be useful. You have a class, start it up, spend a > few bucks, and let it sit idle until you need it again. They charge you a lot to let something sit idle, unless you are using a free instance, which is probably not powerful enough. You can turn it off and then it doesn't cost much (depends on your plan). > Long-term, being > able to separate the webserver node from compute nodes will make that > even more efficient and scalable. Yay! Yep. I'm mainly thinking about this in the context of http://sagemath.blogspot.com/2011/11/is-time-ripe-for-httpsagenbcom.html -- William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
