ext4

I was writing some code in Vala where I would first get the system time, then create a file, then retrieve the time stamp of that file. The timestamp would always be earlier that the system time, somewhere between 500 and 1500 micro seconds which didn't make sense. I then wrote a simple shell script: while true; do touch ~/tmp/fred.txt stat ~/tmp/fred.txt|grep ^C done With the the following result: Change: 2013-01-18 16:02:44.290787250 +1100 Change: 2013-01-18 16:02:44.293787250 +1100 Change: 2013-01-18 16:02:44.296787250 +1100 Change: 2013-01-18 16:02:44.298787248 +1100 Change: 2013-01-18 16

I wish to change the timestamp metadata on files in Java using the java.nio.Files class. I would like to change all 3 Linux/ext4 timestamps (last modified, access, and changed). I am able to change the first two timestamp fields as follows: Files.setLastModifiedTime(pathToMyFile, myCustomTime); Files.setAttribute(pathToMyFile, "basic:lastAccessTime", myCustomTime); However, I am unable modify the last Change: time on the file. Also, it is concerning that there is no change timestamp mentioned in the documentation . The closest available attribute is creationTime , which I tried without any

I only created about 8 million files, then there was no free inode in /dev/sdb1. [spider@localhost images]$ df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sdb1 8483456 8483456 0 100% /home Someone says can specify the inode count when format the partition. e.g. mkfs.ext4 -N 1000000000. I tried but got an error: "inode_size (256) * inodes_count (1000000000) too big...specify higher inode_ratio (-i) or lower inode count (-N). ". What's the appropriate inode_ratio value? I heard the min inode_ratio value is 1024 for ext4. Is it possible to store one billion files on a single partition?