On 04/06/14 10:19, Erkki Seppala wrote: > Martin <m_bt...@ml1.co.uk> writes: > >> The *ONLY* application that I know of that uses atime is Mutt and then >> *only* for mbox files!... > > However, users, such as myself :), can be interested in when a certain > file has been last accessed. With snapshots I can even get an idea of > all the times the file has been accessed. > >> *And go KISS and move on faster* better? > > Well, it in uncertain to me if it truly is better that btrfs would after > that point no longer truly even support atime, if using it results in > blowing up snapshot sizes. They might at that point even consider just > using LVM2 snapshots (shudder) ;).
Not quite... My emphasis is: 1: Go KISS for the defrag and accept that any atime use will render the defrag ineffective. Give a note that the noatime mount option should be used. 2: Consider using noatime as a /default/ being as there are no known 'must-use' use cases. Those users still wanting atime can add that as a mount option with the note that atime use reduces the snapshot defrag effectiveness. (The "for/against atime" is a good subject for another thread!) Go fast KISS! Regards, Martin -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
