Hi, g4hx wrote: > Hello everyone, > > I much appreciate your work on the ntfs-3g driver, I think that ntfs is > the only file system that can be used on linux and windows together. > However, there seems to be a performance problem with the ntfs-3g driver: > I get write rates of about 3 mb/s as opposed to about 90 mb/s with > different file system types on the same disk. Also I have a very high > CPU load, caused by the mount.ntfs process. >
There are a lot of possible causes for this : fragmentation, bad clustering, compression, big files, partition near full, etc. Details about your configuration and how you use ntfs-3g would be useful. The use of fuse to interface with the kernel also limits the throughput : a recent thread on this list has shown that direct writing through the ntfs-3g library (thus evading fuse) is much faster. > Looking at > > http://www.tuxera.com/products/tuxera-ntfs-embedded/performance/ > > I am wondering whether the slow perfromance is intentional to give > people a reason to buy the high-performance version. > This cannot be the reason : ntfs-3g is open source, and anybody can improve it. AFAIK, Tuxera has never opposed any improvement (but they do not give away the improvements they make to their own product). > Note that this problem seems to be well-known > > https://bugs.launchpad.net/ubuntu/+source/ntfs-3g/+bug/554764 > http://serverfault.com/questions/333046/ntfs-3g-poor-write-speed > http://ubuntuforums.org/showthread.php?t=1910036 > http://www.swook.net/2011/10/slow-ntfs-3g-with-oneiric.html > > I would be happy to supply you with some tracing results or help you to > troubleshoot the problem if you are interested in solving it. > Great. I will make available to you a special version of ntfs-3g which will record where in the ntfs-3g code the time is spent. This may give possible directions for improvement. Regards Jean-Pierre ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ ntfs-3g-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ntfs-3g-devel
