Backup.cpp: Defines methods for node signal handling; also provides output methods for backup status messages to user.

BackupFormat.hpp: Defines the formats used for backup data, .CTL, and log files.

Backup.hpp: Defines the Backup class.

BackupInit.cpp: Actual Backup class constructor is found here.

Backup.txt: Contains a backup signal diagram (text format). Somewhat dated (from 2003), but still potentially useful for understanding the sequence of events that is followed during backups.

FsBuffer.hpp: Defines the FsBuffer class, which implements the circular data buffer that is used (together with the NDB file system) for reading and writing backup data and logs.

read.cpp: Contains some utility functions for reading log and checkpoint files to STDOUT.