On Thu, 2013-06-13 at 14:52 +0100, Dave Howorth wrote:
Carlos E. R. wrote:
On 2013-06-13 12:59, Dave Howorth wrote:
Carlos E. R. wrote:
By the way, try not to use "fsync". It forces the kernel to write to disk even if not convenient. I think this is misguided advice. It is very important to use use fsync to ensure that the data makes it onto the disk in order to ensure data or whole files don't disappear.
Yes, of course the data must be written. But if we force the kernel to write it now, we reduce overall performance. Just my opinion, but you can make a run and compare.
Right but performance matters for nothing if the results are incorrect!
Please read up about fsync before encouraging people not to use it. There are lots of links in this thread and in the XFS list discussion.
But it seems all those discussions are about what happens if the system fails. For some uses I can see that this is a valid concern. I do not think it is a problem for me. If the system should happen to fail, loosing the last X minutes of data is the smaller hassle. Repositioning yourself on the road to start again and all the attendant details are more the problem. I am happy to say that system failure in a vehicle has been virtually non-existent. And it is a demanding environment. Of course, we have spent a bit of time getting the power clean and steady. Yours sincerely, Roger Oberholtzer Ramböll RST / Systems Office: Int +46 10-615 60 20 Mobile: Int +46 70-815 1696 roger.oberholtzer@ramboll.se ________________________________________ Ramböll Sverige AB Krukmakargatan 21 P.O. Box 17009 SE-104 62 Stockholm, Sweden www.rambollrst.se -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org