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As we know unix system uses inode number to uniquely identify a file in a file system, and these inode numbers are generated by the system. My question is what if the system runs out of inode number. Shall i be able to create more files or not ??? If not then what shall i do to be able to create more files ???
[QUOTE=n.ashis;22749]As we know unix system uses inode number to uniquely identify a file in a file system, and these inode numbers are generated by the system. My question is what if the system runs out of inode number. Shall i be able to create more files or not ??? If not then what shall i do to be able to create more files ???[/QUOTE]
Inodes are the in-memory representation of files. This means that all the information needed about files (like disk block nos for the file data, permissions, etc) are stored in the inode structure. So, for each file that has been opened, there will be an inode structure.
The maximum number of inode structures are determined by tunables that can be defined based on how the operating system will be used. For example, for a file server, set the maximum to a huge value. For a non-file intensive use, set the max to a lower value.
You are right in that the inodes will ultimately run out as there is a finite number of them When they run out, and we need to open a new file, the file system executes a process called vnode/inode recyling. What this means is that the inode contents for the current file (meta data, etc) and flushed to disk and the same inode is reused for another file.
Hope this helps.
File system depending on inode numbers.
inode having starting address of the boot block.
inode having lot of data.
each inode ocuupy 64kb size.
inode is pointer of the file. it contain file ownership,permission, ans security.
if inode is full then after you have to take the backup of all data and format the system... then after you can give size of the inode at the time of putting file system with newfs command....
[QUOTE=udayn;24524]inode is pointer of the file. it contain file ownership,permission, ans security.
if inode is full then after you have to take the backup of all data and format the system... then after you can give size of the inode at the time of putting file system with newfs command....[/QUOTE]
This is wrong. Read my earlier post to get an idea or read a Unix Internals book like the one authored by Uresh Vahalia or some other book like that. Specifically, concentrate on the concept of inode recycling.
Hope that helps.
It is better for you to read the DESIGN OF UNIX OS book.
There they give all those things.