>>apart from debug_ms = 0/0, what are the currently suggested defaults for >>these performance tweaks?
you can also disable other debug values in ceph.conf, but I don't see super big improvments Another quick wins: - disable cephx authentification - rbd_cache=false (cache=none), improve read latency too. (but if you do sequential writes, you'll loose block merging, so big difference. You need to see what is best for your application here) - use big frequency cpu (both client and server) some big improvement should come soon in librbd http://tracker.ceph.com/issues/13025 (a patch for qemu has been send this week too). This will allow to use iov, avoid copying through a buffer data from qemu block layer to librbd. So this should improve latency). ----- Mail original ----- De: "Waschbüsch IT-Services GmbH" <serv...@waschbuesch.it> À: "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Dimanche 6 Novembre 2016 23:15:39 Objet: Re: [pve-devel] [PATCH] rbdplugin : disable debug_ms to increase performance > Am 05.11.2016 um 15:43 schrieb Alexandre Derumier <aderum...@odiso.com>: > > This increase iops and decrease latencies by around 30% Alexandre, apart from debug_ms = 0/0, what are the currently suggested defaults for these performance tweaks? _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
