noatime and nodiratime are already enabled cat /etc/fstab /dev/sdb /srv/osd.0 xfs noatime,nodiratime 0 0 (drive was formatted simply with mkfs.xfs /dev/sdb) ----- Mail original ----- De: "Tommi Virtanen" <tv@xxxxxxxxxxx> À: "Alexandre DERUMIER" <aderumier@xxxxxxxxx> Cc: ceph-devel@xxxxxxxxxxxxxxx Envoyé: Lundi 18 Juin 2012 18:01:52 Objet: Re: iostat show constants write to osd disk with writeahead journal, normal behaviour ? On Mon, Jun 18, 2012 at 5:34 AM, Alexandre DERUMIER <aderumier@xxxxxxxxx> wrote: > I'm doing test with rados bench, and I see constant writes to osd disks. > Is it the normal behaviour ? with write-ahead should write occur each 20-30 seconde ? Is the osd data filesystem perhaps doing atime updates? noatime is your friend. -- -- Alexandre D erumier Ingénieur Système Fixe : 03 20 68 88 90 Fax : 03 20 68 90 81 45 Bvd du Général Leclerc 59100 Roubaix - France 12 rue Marivaux 75002 Paris - France -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
