On Aug 10 2013 5:45 PM, andy pugh wrote: > On 11 August 2013 00:32, Michael Haberler <mai...@mah.priv.at> wrote: > >> Flatly, the idea of using locally generated serial numbers to tag a >> commands in a shared memory buffer and hoping for no collisions to >> occur was - to put it mildly - a lapse in design to start with. > > I can think of several ways to make that work, if that was a > requirement. For example MAC addresses are guaranteed unique (Well, > unless you deliberately spoof them) as is the process ID (locally) > of > the creating process, so a hash of MAC, PID and local sequence can > probably be collision-free. > > Not that I am saying that that is sensible, necessary or wise.
there are a number of ways to ensure that you have UID's. Is it necessary it to permanently unique, or is this within a given run/uptime/etc.? That will make a difference. EBo -- ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
