RE: Build a new Informix Server - some questions

> > > >>Yes. > > >>It's slower (10-20% according to some), but I haven't > seen any tests on > > >>Linux. You use the buffering of the OS, spending more > memory and time > > >>on something the OS shouldn't bother with. And if your OS > crash at the > > >>wrong time (paging mr. Murphy!) it could have told > Informix that the > > >>pages was written when they actually was in the cache... > > > So, What'd happen with data ??!! Could it make the fast recovery > > correctly ? > > Maybe, maybe not... > Maybe Art has some hands-on experiences with this kind of fun? Isn't this covered by the fact O_SYNC is used to talk to cooked files system. Raw is always faster 'cos the code path is shorter, ie you don't go through the kernel address space when talking to the disk, page caching and the paging mechanism is avoided. This means each read and write call causes a physical disk transfer. Paul Watson WF Software Ltd Tel: +44 1436 674729 Fax: +44 1436 678693 www.wfsoftware.com/informix