1.1.1 NDB Cluster Data Node Data Directory Files

An NDB Cluster data node's data directory (DataDir) contains at least 3 files. These are named as shown in the following list, where node_id is the node ID:

• ndb_node_id_out.log

  Sample output:

  2015-11-01 20:13:24 [ndbd] INFO     -- Angel pid: 13677 ndb pid: 13678
  2015-11-01 20:13:24 [ndbd] INFO     -- NDB Cluster -- DB node 1
  2015-11-01 20:13:24 [ndbd] INFO     -- Version 5.6.27-ndb-7.4.8 --
  2015-11-01 20:13:24 [ndbd] INFO     -- Configuration fetched at localhost port 1186
  2015-11-01 20:13:24 [ndbd] INFO     -- Start initiated (version 5.6.27-ndb-7.4.8)
  2015-11-01 20:13:24 [ndbd] INFO     -- Ndbd_mem_manager::init(1) min: 20Mb initial: 20Mb
  WOPool::init(61, 9)
  RWPool::init(82, 13)
  RWPool::init(a2, 18)
  RWPool::init(c2, 13)
  RWPool::init(122, 17)
  RWPool::init(142, 15)
  WOPool::init(41, 8)
  RWPool::init(e2, 12)
  RWPool::init(102, 55)
  WOPool::init(21, 8)
  Dbdict: name=sys/def/SYSTAB_0,id=0,obj_ptr_i=0
  Dbdict: name=sys/def/NDB$EVENTS_0,id=1,obj_ptr_i=1
  m_active_buckets.set(0)

• ndb_node_id_signal.log

  This file contains a log of all signals sent to or from the data node.

  Note

  This file is created only if the SendSignalId parameter is enabled, which is true only for -debug builds.

• ndb_node_id.pid

  This file contains the data node's process ID; it is created when the ndbd process is started.

The location of these files is determined by the value of the DataDir configuration parameter.