I had a problem (new to me) last week. I have a ext4 (Fedora 15) filesystem. The application that runs on the server suddenly stopped. I couldn't find the problem at first look. df showed 50% available space. After searching for about an hour I saw a forum post where the guy used df -i. The option looks for inodes usage. The system was out of inodes, a simple problem that I didn't realize. The partition had only 3.2M inodes.Now, my questions are: Can I make the system have more inodes? Should/can it be set when formatting the disk? With the 3.2M inodes, how many files could I have?
How can I increase the number of inodes in an ext4 filesystem?
filesystems;files;partition;size;inode
It seems that you have a lot more files than normal expectation.I don't know whether there is a solution to change the inode table size dynamically.  I'm afraid that you need to back-up your data, and create new filesystem, and restore your data.To create new filesystem with such a huge inode table, you need to use '-N' option of mke2fs(8).I'd recommend to use '-n' option first (which does not create the fs, but display the use-ful information) so that you could get the estimated number of inodes.  Then if you need to, use '-N' to create your filesystem with a specific inode numbers.