Hi, Today I've been playing with CephFS and the morning started great with CephFS playing along just fine. Some information first: - Ceph 0.89 - Linux kernel 3.18 - Ceph fuse 0.89 - One Active MDS, one Standby This morning I could write a 10GB file like this using the kclient: $ dd if=/dev/zero of=10GB.bin bs=1M count=10240 conv=fsync That gave me 850MB/sec (all 10G network) and I could read the same file again with 610MB/sec. After writing to it multiple times it suddenly started to hang. No real evidence on the MDS (debug mds set to 20) or anything on the client. That specific operation just blocked, but I could still 'ls' the filesystem in a second terminal. The MDS was showing in it's log that it was checking active sessions of clients. It showed the active session of my single client. The client renewed it's caps and proceeded. I currently don't have any logs, but I'm just looking for a direction to be pointed towards. Any ideas? -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on -- 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
