btrfs and atime - is that similar with Hammer?

[Tobias Weingartner]

One solution I didn't see, is to pull atime out of the filesystem
metadata, and make
it a database within it's own file on the filesystem.  This does have
a number of
benefits.  For one, the atimes for all files are collected within a
simple file, which
will get snapshot'ed with other files.  And for two, the updates to
this invisible file
would be cached, and not having to deal with a full sync-round-trip
(as in the old
ffs filesystems, yes, some have solved this issue).

The extra space within the inode could be used for create-time, which
can be useful
at times.

-Toby.

On Wed, Jun 20, 2012 at 3:44 AM, Tomas Bodzar <tomas.bodzar at gmail.com> wrote:
> See https://lwn.net/Articles/499293/