Ceph

When you tried to rerun objectstore_bench for filestore , you got below error just because the collection was not removed.

2015-10-16 15:06:57.147885 7f3a07399700 0 filestore(/mnt/nvmedevice) error (17) not handled on operation 0x4330000 (6.0.0, or op 0, counting from 0)
2015-10-16 15:06:57.147907 7f3a07399700 0 filestore(/mnt/nvmedevice) unexpected error code
2015-10-16 15:06:57.147909 7f3a07399700 0 filestore(/mnt/nvmedevice) transaction dump: {
"ops": [ {
"op_num": 0,
"op_name": "mkcoll",
"collection": "0.0_head"
}
]
}