Hello, after correcting the configuration for different qemu vm's with rbd disks (we removed the cache=writethrough option to have the default writeback mode) we have a strange behaviour after restarting the vm's.
For most of them the cache mode is now writeback as expected. But some neverthless use the disks in writethrough mode (at least an 'info block' reports that on the qemu monitor). This does also not change when configuring cache=writeback explicitly. On our 6 node KVM Cluster we have the same behaviour for the problematic vm's on all hosts which are configured equally with qemu 2.5.1, ceph 0.94.7 and kernel 4.4.6. The ceph cluster has version 0.94.6. For me it seems to be a problem specific to the rbd's. Is there a way to check the cache behaviour of a single rbd? Regards Steffen -- Klinik-Service Neubrandenburg GmbH Allendestr. 30, 17036 Neubrandenburg Amtsgericht Neubrandenburg, HRB 2457 Geschaeftsfuehrerin: Gudrun Kappich _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
