Assign each server a number and prefix/append that number to the unique > ID. > I will suggest you above, append -A for first machine and -B for second machine. -Prabhat
On Thu, Jul 21, 2011 at 12:13 PM, Daevid Vincent <dae...@daevid.com> wrote: > I can think of several ways to accomplish this (or close to it). > > * Assign each server a number and prefix/append that number to the unique > ID. > * initialize each table on each server at a different huge number so they > don't ever collide: > ALTER TABLE `students` AUTO_INCREMENT=10000000; > Other server: > ALTER TABLE `students` AUTO_INCREMENT=20000000; > * don't re-invent the wheel and just use UUID() > * make the primary key a combination key of a regular auto-increment and > NOW() or RAND() or some other unique column of the table itself or > something > like IP number of the server, etc. > * setup a trigger to alter the primary key accordingly prior to insert. > Maybe one server is even numbers and the other is odd numbers, or use MOD() > or other math to have a pool of servers. > > http://stackoverflow.com/questions/5416548/mysql-two-column-primary-key-with > -auto-increment > > > > -----Original Message----- > > From: Vikram A [mailto:vikkiatb...@yahoo.in] > > Sent: Wednesday, July 20, 2011 11:18 PM > > To: MY SQL Mailing list > > Subject: Next Unique Number - Generation > > > > Hi there, > > > > I need a technical help fro you, > > I have developed a software for college & school. Here we have concept > > called register number/admission number. These are two unique umber for > each > > student. My application resides Client/server model. > > These numbers will be generated (some defined format) to each student > when > > they are admitted at first time. This admission process is taken place at > > different nodes at a time. > > In this scenario, I am facing difficulty that, the same number is > generated > > at time in two machines. (Logic is newest number will be displayed in the > > node before admission). > > > > How can I stop this logical issue? > > Can i have solution for this? > > > > Thank you in advance. > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: > http://lists.mysql.com/mysql?unsub=aim.prab...@gmail.com > > -- Best Regards, Prabhat Kumar MySQL DBA My Blog: http://adminlinux.blogspot.com My LinkedIn: http://www.linkedin.com/in/profileprabhat
