From: tphyahoo Subject: Help me prove macid can scale! (Macid stress tests results for happs-tutorial toy job board disappointing so far.) To: HAppS HAppS is a new, relatively unproven technology. So I am asking myself this question. Will HAppS allow me to scale the toy job board I created for happs-tutorial into a high-volume, high concurrency, large-user count type job board? You know, the kind that might make money? I have done some preliminary testing to answer this question, and so far the results have been disappointing. I am hoping that I am doing something wrong, and that there is a way of using macid effectively for more than just toy applications. If there are solution for the problems I'm experiencing I will definitely be integrating this knowledge into the tutorial, so stay tuned. I am seeking feedback from HAppS experts and educated users on the following questions: * Is building a heavy duty website like monster.com in HAppS a realistic goal -- say, in the next twelve months? * Are there certain types of web apps that are unlikely to work well with the HAppS web architecture? * Are there changes I can make to my toy app's architecture -- be it data structures, buying new hardware, whatever -- that will enable me to get good performance against the stress test described below and in the demo? * Are there other HAppS stress tests in the public domain, and what are the results so far? A complete description of the stress test I did (basically, insert 200 users with 200 jobs apiece) along with a runnable demo, is in the tutorial preview at http://happstutorial.com:5002/tutorial/macid-stress-test. (The actual stress test is disabled in the online demo because I don't want to zap my server.) But the summary is, it's slow, slow to start, and creates a huge events file -- 356M. For around 40000 records. That's like, 8 megabytes per job, which is a few lines of text. OK, happs isn't a database -- but still. This is all is checked into darcs and tagged: darcs get --tag='stress test'http://code.haskell.org/happs-tutorial Thanks in advance for helping make happs usable in the real world! thomas.