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 via 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.
