Joerg Schilling wrote:
I test applications on a Celeron with 256MB to be sure they will run on modest user machines. While CPU is not an issue, I would expect that 1GB is enough to provide all the buffer space the application can use. I never see buffer effects on my production machines, when an entire CD will fit in memory there's not much buffer bontention. A 3GB DVD image on 256MB shows good benefit from writing with O_DIRECT.Bill Davidsen <davidsen@tmr.com> wrote:Did you do the test on a machine with limited memory? I may have asked this before, but I don't see a reply, sorry if this is a repeated question. I find the great benefit when memory for buffers is limited.I did try it recently with creating a SchilliX ISO image (~ 20000 files 700 MB) and it did not help.I don't know what you call "limited memory". I used a Dual Opteron with 1 GB of RAM so this may be called a machine with limited memory.
Thanks for testing. -- bill davidsen <davidsen@tmr.com> CTO TMR Associates, Inc Doing interesting things with small computers since 1979