On Wed, Jun 24, 2009 at 2:50 PM, Roy Sigurd Karlsbakk<roy@karlsbakk.net> wrote: > On 24. juni. 2009, at 17.12, Mark Ruijter wrote: <snip> >> I am thinking about starting to work on a data deduplicating >> blockdevice, a kernel module called blockless. > > If done smartly, this may perhaps be possible, but the problem is the > filesystem's metadata. Is this going to be dedup'ed? How much will this > take? A simple backup will update atime on all the files backed up, and > although atime isn't always wanted or needed, the problem occurs elsewhere. > As of the 2.6.30 kernel a default mount option is "relatime". That is a relatively new mount option that drastically reduces the number of atime updates. ie. Not realtime, but relatime. Greg -- Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
