A couple of reasons in this particular app: a) To have per application settable cron functionality (with regular vixie cron compatible syntax) from within web2py, without root privileges, regardless of how it's run (cherrypy, mod_proxy, cgi or mod_wsgi). AND, it should work on windows and mac as well. This in effect makes it possible to just 'drop in' the monitoring application via the web2py admin interface and it will hit the ground running. So, to recap, in comparison to a 'classic' cron script or extra threads, you do not need to restart web2py or the webserver (ever), if you DO restart it your events won't get lost, you don't need root, you don't need ssh, you don't need a system cron, has next to none overhead, it doesn't care about the server OS, it just pretty much gives you good 'ole cron syntax&functionality without the hassle. You could even make a GUI editor for the cron tasks in the admin like you edit DB entries.
b) to have no delay for clients while the graph data/aggregation is being done, or while the data is being inserted in RRD (I'd like to do this via decorators, but I'm not a pythonista enough for that, yet). c) I'm running apache WSGI, which makes threads very awkward (if not done on the WSGI level). Starting a thread and then doing return without mod_wsgi knowing about the thread is NOT what you want (been there, done that, ended up on the mod_wsgi list and got the recommendation which is in the patch now). CGI is even worse. d) do I need more reasons ? :) On Dec 15, 8:20 pm, mdipierro <[email protected]> wrote: > This looks cool. Sorry for the patch but I am a little behind. I hope > to be able to look at ti again in the next few days. Could you tell us > why the patch is necessary? You can start threads, store them in cache > and monitor them without the patch. > > Massimo > > On Dec 15, 6:07 am, achipa <[email protected]> wrote: > > > There is an appliance, and I'm also working on something of my own, a > > little teaser: > > >http://picasaweb.google.com/attila.csipa/WebmonSshot > > > It can do 'regular' graph style charts but is pluggable so you can > > write custom reports (like in the first picasa image). The reason it > > is not public yet is that it relies heavily on my connectiontask > > (a.k.a. cron) patch which is still under consideration by Massimo (= > > not in trunk). > > > On Dec 14, 4:13 am, voltron <[email protected]> wrote: > > > > Hi there! > > > > Someone mentioned a project that was to use Web2py to monitor services > > > on a system,has there been any progress? I am greatly interested. > > > > Thanks --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. 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/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
