Hi, I filed a issue in the tracker, but I'm looking for some feedback to diagnose this a bit further: http://tracker.ceph.com/issues/17545 The situation is that with a Firefly or Hammer (haven't tested Jewel yet) a MSSQL server running on RBD will sometimes complain about corruption. Using SQLioSim we can reproduce the issue on a small Proxmox + Ceph cluster and after an hour or so it will yield: Expected FileId: 0x0 Received FileId: 0x0 Expected PageId: 0xCB19C Received PageId: 0xCB19A (does not match expected) Received CheckSum: 0x9F444071 Calculated CheckSum: 0x89603EC9 (does not match expected) Received Buffer Length: 0x2000 The issue only seems to happen with RBD caching enabled. When disabling the RBD cache or using cache=directsync we were not able to reproduce the issue. When using LVM/file based backends for Qemu the problem also didn't pop up. So this seems to be either a librbd issue or the RBD driver inside Qemu. Any hints on how to debug this further to find the root cause? Wido -- 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
