Dear All, Sorry, but I need to add +1 to the mds crash reports with ceph 12.0.3-1507-g52f0deb This happened to me after updating from 12.0.2 All was fairly OK for a few hours, I/O around 500MB/s, then both MDS servers crashed, and have not worked since. The two MDS servers, are active:standby, both now crash immediately after being started. This cluster has been upgraded from Kraken, through several Luminous versions, so I did a clean install of SL7.3 on one MDS server, and still have crashes on this machine. Cluster has 40 x 8TB drives (EC 4+1), with dual replicated NVME providing a hotpool to drive the Cephfs layer. df -h /cephfs is/was 200TB. All OSD's are bluestore, and were generated on Luminous. I enabled snapshots a few days ago, and keep 144 snapshots (one taken every 10 minutes, each is kept for 24 hours only) about 30TB is copied into the fs each day. If snapshots caused the crash, I can regenerate the data, but they are very useful. One MDS gave this log... <http://www.mrc-lmb.cam.ac.uk/jog/ceph-mds.cephfs1.log> many thanks for any suggestions, and it's great to see the experimental flag removed from bluestore! Jake -- 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
