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ndb_print_backup_file − print NDB backup file contents


ndb_print_backup_file file_name


ndb_print_backup_file obtains diagnostic information from a cluster backup file.

Table 23.39. Command−line options used with the program ndb_print_backup_file

ndb_print_backup_file [−P password] file_name

file_name is the name of a cluster backup file. This can be any of the files (.Data, .ctl, or .log file) found in a cluster backup directory. These files are found in the data node's backup directory under the subdirectory BACKUP−#, where # is the sequence number for the backup. For more information about cluster backup files and their contents, see Section, “NDB Cluster Backup Concepts”.

Like ndb_print_schema_file and ndb_print_sys_file (and unlike most of the other NDB utilities that are intended to be run on a management server host or to connect to a management server) ndb_print_backup_file must be run on a cluster data node, since it accesses the data node file system directly. Because it does not make use of the management server, this utility can be used when the management server is not running, and even when the cluster has been completely shut down.

In NDB 8.0, this program can also be used to read undo log files. Options

Prior to NDB 8.0.24, ndb_print_backup_file supported only the −P option. Beginning with NDB 8.0.24, the program supports a number of options, which are described in the following list.


Specify the password needed to decrypt an encrypted backup.

The long form of this option is available beginning with NDB 8.0.24.


Allow input of the password from standard input, similar to entering a password after invoking mysql −−password with no password supplied.


Control file directory number. Used together with −−print−restored−rows.


Read given file after global files are read.


Read default options from given file only.


Also read groups with concat(group, suffix).


Fragment ID. Used together with −−print−restored−rows.


Print program usage information.


Read given path from login file.


Do not read default options from any option file other than login file.


Do not include rows in output.


Print program argument list and exit.


Include header words in output.


Include restored rows in output, using the file LCP/c/TtFf.ctl, for which the values are set as follows:

c is the control file number set using −−control−directory−number

t is the table ID set using −−table−id

f is the fragment ID set using −−fragment−id


Print rows. This option is enabled by default; to disable it, use −−no−print−rows.


Print rows per page.


File to check for row ID.


Show ignored rows.


Table ID. Used together with −−print−restored−rows.


Display help text and exit; same as −−help.


Verbosity level of output. A greater value indicates increased verbosity.


Display version information and exit.


Copyright © 1997, 2021, Oracle and/or its affiliates.

This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.


For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.


Oracle Corporation (http://dev.mysql.com/).