> On Thu, 29 May 2008, Graeme Geldenhuys wrote: > > I'm trying to do performance testing in Firebird RDBMS using GUID's > > and primary keys. I constantly got PK violations. I then wrote the > > code show below to create 50,000 GUID's and add them to a StringList > > (no duplicates allowed). Every time I run this I get a duplicate GUID > > at iteration 1021. My original test is supposed to create 5mil > > records, but I can't get past 1000! :-( > > As a short workaround: > > The default implementation on Linux uses a random() call to generate a > guid, combined with a timestamp, if I recall correctly.
rtl/linux/suuid.inc reads from '/proc/sys/kernel/random/uuid' Maybe it is not used though. > You can use the kernel mechanism by inluding libuuid in your uses clause. > That should ensure uniqueness. It's unportable though. It is wiser to try to find out why the default (and portable call) doesn't work on Linux, using a system generator. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
