Evan wrote: > Hello - > > My script use a DB file which is written by XML, and the user load > this DB file (XML tree in memory), and then do some updating about > this tree, such as delete element, generate new element or move > element. > > The thing is, my script is a cmd based program (based on module > "cmd"), and there are many users would use this script at same time, > in a shell style prompt (module "cmd"), so I want to implement a > updating after a user update the XML tree, it such as a "signal > console", so that all the user can keep same DB, or other user can > see update a few seconds later. > > What I did is, create a new file calling "db_change", and put a number > "1" in file, and then update the real "DB" file (by change uid to lock > file), other user to check this file and then re-load XML file, but I > do not think it is a good idea, the performance is not good. > > I would like to know if you could help on this matter, I hope I can > get inspiration/example from you guys.
Start using a proper database. And get rid of the XML. If you need it for output/exchange purposes, generate it from the DB. Diez -- http://mail.python.org/mailman/listinfo/python-list
