Le 03/01/2017 à 13:59, Dominik Csapak a écrit : > On 01/03/2017 11:33 AM, Dhaussy Alexandre wrote: >> Hello, >> >> I just spotted something strange with storage cache mode. >> >> I set cache=none on all my VMs (i believe this is the default), however >> qm monitor says "writeback, direct". >> >> Am i missing something ? >> > > from the kvm manpage: > > The host page cache can be avoided entirely with cache=none. This > will attempt to do disk IO directly to the guest's memory. > QEMU may still perform an internal copy of the data. Note > that this is considered a writeback mode and the guest OS must handle > the disk write cache correctly in order to avoid data > corruption on host crashes. > > so cache=none is considered a writeback mode and this is represented by > writeback, direct > > if you select writeback mode for a disk it shows only > writeback > > so i think this is correct Oh yes, bad for me :( It is also explained here : https://pve.proxmox.com/wiki/Performance_Tweaks
I think i should have used directsync instead (with SAN storage..) Thanks for clarifying ! _______________________________________________ pve-user mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
