Only the DBLQH and NDBCNTR kernel blocks are directly involved in this phase. DBLQH allocates a record in the BACKUP block, used in the execution of local checkpoints using the DEFINE_BACKUP_REQ signal. NDBCNTR causes NDB_STTOR to execute NDB_STTOR phase 3; there is otherwise no other NDBCNTR activity during this STTOR phase.