Hammer: Transactional file updates

[Daniel Taylor]

--- On Fri, 1/8/08, Michael Neumann <mneumann at ntecs.de> wrote:

>    fd = open(file);  // behaves like START TRANSACTION
>    read(fd, ...);
>    write(fd, ...);
>    close(fd);        // behaves like COMMIT

If you want a commit on close, fsync() the file just before you close() it.

> That would be fine except that it would give me a new inode
> number, and
> the inode number is right now the only way to associate
> further data
> with a file.

Why do you care if you get a new inode vs multiple versions of the same inode?



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