Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Monday 25 June 2012 at 17:10:51, Florian Haas wrote: > On Fri, Jun 22, 2012 at 6:53 PM, Thilo Uttendorfer > <t.uttendorfer at linux-ag.com> wrote: > > we have a KVM cluster with each virtual machine running on top of a DRBD > > device. After running this setup for many month we recently saw these log > > messages on two (of total 15) DRBD devices: > > > > Jun 22 17:53:01 server-v1 kernel: [4995041.347749] block drbd13: > > qemu-system-x86[9395] Concurrent local write detected! [DISCARD L] new: > > 53981575s +28672; pending: 53981575s +20480 > > Those writes overlap only partially, so yes that's cause for concern. > Not saying that you are actively shredding your data, but you at least > need to double check. > > > Looking at older posts on this topic [1], we are worried that we have > > serious data corruption. Does this indicate that qemu-system-x86 (kvm) > > has a bug in some (probably rare) conditions? > > Libvirt configuration or qemu/kvm command line please? (don't post > them here; pastebin and share the URL instead). thanks for your help: http://pastebin.com/mZxaJr5a Thilo -- Thilo Uttendorfer Linux Information Systems AG Putzbrunner Str. 71, 81739 München Fon: +49 89 993412-11, Fax: +49 89 993412-99 t.uttendorfer at linux-ag.com, http://www.linux-ag.com