METADATA_COLUMNS
id(int) cluster_id(int) machine_id(int) url(str) state(int) last_attempt(int) failed_attempts(int) no_tries(int) duration(int) description(str)
METADATA_KEY

METADATA_READONLY
0
METADATA_LOGFLAGS
0
METADATA_DEFAULTS
NIL|NIL|NIL|NIL|1|0|3|0|30|NIL
