Hi, g4hx wrote: > On 07/01/2012 10:40 PM, Jean-Pierre André wrote: > > 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. >>> >> >> > > Hello Jean-Pierre, > > first of all, thanks for the fast reply, I am very impressed. Also I did > not mean to imply that you guys are not doing your very best to help > improve ntfs-3g. > > I attached the files that you wanted to see. During the mount with the > debug-* programs I of course also ran dd to produce some relevant data. > > You may also notice that this particular ntfs partition is inside of a > truecrypt container. This does not seem to be the issue as the same > happens on partitions which are not encrypted. Also I think it unlikely > that the issue is related to fragmentation since the problem also occurs > with another partition which should be relatively clean
Your data show a very unusual pattern : more than half the time is spent locating attributes. You only opened four files (probably a single one four times), so you must have a file with a lot of attributes such as names (hard links) or extended attributes. Can you say more on what you were doing, and post the output of "ntfsinfo -fvi inode device" where inode is the inode number of your unusual file (which you can get from "ls -li filename"). This is likely to be long, as there are about 30 extents to the inode. 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
