Menu
I recently started learning about the Linux kernel and I just learned about inodes, which are data-structures containing meta-data of a file.
Now, how do the OS find the associated inode of a file? (Let's say a string of a path). Moreover, where are those inode stored at? I mean, obviously they are stored on the disk but how is it all managed?
One naive solution (I can come up with) would be to allocate on the disk a region designated only for inodes - What's actually done?
783
The inode table is stored in the logic disk block. Each entry of inode table stores some file attributes, such as file size, permission, ownership, disk block address, time of last modification etc. Both directories and ordinary (non-directory) files are files.
In general, Linux only loads an inode into memory when the file is opened. The data may persist in updated form in memory for some time after a file is closed before it is flushed to disk (via caching logic) or marked disused.
Use the command df-i to pull basic data about your inode usage, including the file system on which the inodes are stored, your total inode count, how many are in use (in count and %), and how many remain. Use -inum to find files associated with a certain inode. Inversely, use ls-i to get the inode number of a file.
Inodes store information about files and directories (folders), such as file ownership, access mode (read, write, execute permissions), and file type. On many older file system implementations, the maximum number of inodes is fixed at file system creation, limiting the maximum number of files the file system can hold.
It depends on file system implementation. For example ext2fs/ext3fs choose to store inodes before data blocks within Block Group. The Second Extended File system (EXT2)
Remember inodes stored across all Block Groups. For example, inodes 1 to 32768 will get stored in Block Group-0 and inodes 32768 to 65536 stored on Block-Group-2 and so on.
So, the answer to your question is: Inodes are stored in inode tables, and there's an inode table in every block group in the partition.
194
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
