Inode number changing

[Manish Katiyar]

>     Sir, we are the four student of final year computer engineering from
> pune University(India).

I could guess that :-) !

> and Our project is "File level snapshot in ext4 file
> system".we have to show previous(at the time of snapshot) content of a file
> while modification is done on that file.so for that we are using inode
> number as search key.but inode number is goes on changing if file is
> modified by using vim editor .so how can we search inode number of file.
> user is not using dd command for file modification.

Do you have the design written anywhere ? I would be interested in
knowing the highlevel stuff atleast.

-- 
Thanks -
Manish