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'\" t
.\" Title: \fBndbd\fR
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 11/26/2016
.\" Manual: MySQL Database System
.\" Source: MySQL 5.7
.\" Language: English
.\"
.TH "\FBNDBD\FR" "8" "11/26/2016" "MySQL 5\&.7" "MySQL Database System"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
ndbd \- the NDB Cluster data node daemon
.SH "SYNOPSIS"
.HP \w'\fBndbd\ \fR\fB\fIoptions\fR\fR\ 'u
\fBndbd \fR\fB\fIoptions\fR\fR
.SH "DESCRIPTION"
.PP
\fBndbd\fR
is the process that is used to handle all the data in tables using the NDB Cluster storage engine\&. This is the process that empowers a data node to accomplish distributed transaction handling, node recovery, checkpointing to disk, online backup, and related tasks\&.
.PP
In an NDB Cluster , a set of
\fBndbd\fR
processes cooperate in handling data\&. These processes can execute on the same computer (host) or on different computers\&. The correspondences between data nodes and Cluster hosts is completely configurable\&.
.PP
The following table includes command options specific to the NDB Cluster data node program
\fBndbd\fR\&. Additional descriptions follow the table\&. For options common to most NDB Cluster programs (including
\fBndbd\fR), see
Options Common to NDB Cluster Programs(1)\&.
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.B Table\ \&19.85.\ \& This table describes command\-line options for the ndbd program
.TS
allbox tab(:);
.
.TE
.sp 1
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
.PP
All of these options also apply to the multi\-threaded version of this program (\fBndbmtd\fR) and you may substitute
\(lq\fBndbmtd\fR\(rq
for
\(lq\fBndbd\fR\(rq
wherever the latter occurs in this section\&.
.sp .5v
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-bind\-address\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-bind\-address=name
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
string
T}
:T{
\fBDefault\fR
T}:T{
T}
.TE
.sp 1
Causes
\fBndbd\fR
to bind to a specific network interface (host name or IP address)\&. This option has no default value\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-daemon\fR,
\fB\-d\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-daemon
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
TRUE
T}
.TE
.sp 1
Instructs
\fBndbd\fR
or
\fBndbmtd\fR
to execute as a daemon process\&. This is the default behavior\&.
\fB\-\-nodaemon\fR
can be used to prevent the process from running as a daemon\&.
.sp
This option has no effect when running
\fBndbd\fR
or
\fBndbmtd\fR
on Windows platforms\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-nodaemon\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-nodaemon
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
FALSE
T}
.TE
.sp 1
Prevents
\fBndbd\fR
or
\fBndbmtd\fR
from executing as a daemon process\&. This option overrides the
\fB\-\-daemon\fR
option\&. This is useful for redirecting output to the screen when debugging the binary\&.
.sp
The default behavior for
\fBndbd\fR
and
\fBndbmtd\fR
on Windows is to run in the foreground, making this option unnecessary on Windows platforms, where it has no effect\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-foreground\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-foreground
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
FALSE
T}
.TE
.sp 1
Causes
\fBndbd\fR
or
\fBndbmtd\fR
to execute as a foreground process, primarily for debugging purposes\&. This option implies the
\fB\-\-nodaemon\fR
option\&.
.sp
This option has no effect when running
\fBndbd\fR
or
\fBndbmtd\fR
on Windows platforms\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-initial\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-initial
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
FALSE
T}
.TE
.sp 1
Instructs
\fBndbd\fR
to perform an initial start\&. An initial start erases any files created for recovery purposes by earlier instances of
\fBndbd\fR\&. It also re\-creates recovery log files\&. On some operating systems, this process can take a substantial amount of time\&.
.sp
An
\fB\-\-initial\fR
start is to be used
\fIonly\fR
when starting the
\fBndbd\fR
process under very special circumstances; this is because this option causes all files to be removed from the NDB Cluster file system and all redo log files to be re\-created\&. These circumstances are listed here:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
When performing a software upgrade which has changed the contents of any files\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
When restarting the node with a new version of
\fBndbd\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
As a measure of last resort when for some reason the node restart or system restart repeatedly fails\&. In this case, be aware that this node can no longer be used to restore data due to the destruction of the data files\&.
.RE
.sp
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBWarning\fR
.ps -1
.br
To avoid the possibility of eventual data loss, it is recommended that you
\fInot\fR
use the
\fB\-\-initial\fR
option together with
StopOnError = 0\&. Instead, set
StopOnError
to 0 in
config\&.ini
only after the cluster has been started, then restart the data nodes normally\(emthat is, without the
\fB\-\-initial\fR
option\&. See the description of the
StopOnError
parameter for a detailed explanation of this issue\&. (Bug #24945638)
.sp .5v
.RE
Use of this option prevents the
StartPartialTimeout
and
StartPartitionedTimeout
configuration parameters from having any effect\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
This option does
\fInot\fR
affect either of the following types of files:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Backup files that have already been created by the affected node
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
NDB Cluster Disk Data files (see
Section\ \&19.5.13, \(lqNDB Cluster Disk Data Tables\(rq)\&.
.RE
.sp
This option also has no effect on recovery of data by a data node that is just starting (or restarting) from data nodes that are already running\&. This recovery of data occurs automatically, and requires no user intervention in an NDB Cluster that is running normally\&.
.sp .5v
.RE
It is permissible to use this option when starting the cluster for the very first time (that is, before any data node files have been created); however, it is
\fInot\fR
necessary to do so\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-initial\-start\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-initial\-start
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
FALSE
T}
.TE
.sp 1
This option is used when performing a partial initial start of the cluster\&. Each node should be started with this option, as well as
\fB\-\-nowait\-nodes\fR\&.
.sp
Suppose that you have a 4\-node cluster whose data nodes have the IDs 2, 3, 4, and 5, and you wish to perform a partial initial start using only nodes 2, 4, and 5\(emthat is, omitting node 3:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndbd \-\-ndb\-nodeid=2 \-\-nowait\-nodes=3 \-\-initial\-start\fR
shell> \fBndbd \-\-ndb\-nodeid=4 \-\-nowait\-nodes=3 \-\-initial\-start\fR
shell> \fBndbd \-\-ndb\-nodeid=5 \-\-nowait\-nodes=3 \-\-initial\-start\fR
.fi
.if n \{\
.RE
.\}
.sp
When using this option, you must also specify the node ID for the data node being started with the
\fB\-\-ndb\-nodeid\fR
option\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
Do not confuse this option with the
\fB\-\-nowait\-nodes\fR
option for
\fBndb_mgmd\fR, which can be used to enable a cluster configured with multiple management servers to be started without all management servers being online\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-nowait\-nodes=\fR\fB\fInode_id_1\fR\fR\fB[, \fR\fB\fInode_id_2\fR\fR\fB[, \&.\&.\&.]]\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-nowait\-nodes=list
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
string
T}
:T{
\fBDefault\fR
T}:T{
T}
.TE
.sp 1
This option takes a list of data nodes which for which the cluster will not wait for before starting\&.
.sp
This can be used to start the cluster in a partitioned state\&. For example, to start the cluster with only half of the data nodes (nodes 2, 3, 4, and 5) running in a 4\-node cluster, you can start each
\fBndbd\fR
process with
\fB\-\-nowait\-nodes=3,5\fR\&. In this case, the cluster starts as soon as nodes 2 and 4 connect, and does
\fInot\fR
wait
StartPartitionedTimeout
milliseconds for nodes 3 and 5 to connect as it would otherwise\&.
.sp
If you wanted to start up the same cluster as in the previous example without one
\fBndbd\fR
(say, for example, that the host machine for node 3 has suffered a hardware failure) then start nodes 2, 4, and 5 with
\fB\-\-nowait\-nodes=3\fR\&. Then the cluster will start as soon as nodes 2, 4, and 5 connect and will not wait for node 3 to start\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-nostart\fR,
\fB\-n\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-nostart
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
boolean
T}
:T{
\fBDefault\fR
T}:T{
FALSE
T}
.TE
.sp 1
Instructs
\fBndbd\fR
not to start automatically\&. When this option is used,
\fBndbd\fR
connects to the management server, obtains configuration data from it, and initializes communication objects\&. However, it does not actually start the execution engine until specifically requested to do so by the management server\&. This can be accomplished by issuing the proper
START
command in the management client (see
Section\ \&19.5.2, \(lqCommands in the NDB Cluster Management Client\(rq)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-install[=\fR\fB\fIname\fR\fR\fB]\fR
.TS
allbox tab(:);
l l s s
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-install[=name]
T}
T{
\fBPlatform Specific\fR
T}:T{
Windows
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
string
T}
:T{
\fBDefault\fR
T}:T{
ndbd
T}
.TE
.sp 1
Causes
\fBndbd\fR
to be installed as a Windows service\&. Optionally, you can specify a name for the service; if not set, the service name defaults to
ndbd\&. Although it is preferable to specify other
\fBndbd\fR
program options in a
my\&.ini
or
my\&.cnf
configuration file, it is possible to use together with
\fB\-\-install\fR\&. However, in such cases, the
\fB\-\-install\fR
option must be specified first, before any other options are given, for the Windows service installation to succeed\&.
.sp
It is generally not advisable to use this option together with the
\fB\-\-initial\fR
option, since this causes the data node file system to be wiped and rebuilt every time the service is stopped and started\&. Extreme care should also be taken if you intend to use any of the other
\fBndbd\fR
options that affect the starting of data nodes\(emincluding
\fB\-\-initial\-start\fR,
\fB\-\-nostart\fR, and
\fB\-\-nowait\-nodes\fR\(emtogether with
\fB\-\-install\fR, and you should make absolutely certain you fully understand and allow for any possible consequences of doing so\&.
.sp
The
\fB\-\-install\fR
option has no effect on non\-Windows platforms\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-remove[=\fR\fB\fIname\fR\fR\fB]\fR
.TS
allbox tab(:);
l l s s
l l s s
l l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-remove[=name]
T}
T{
\fBPlatform Specific\fR
T}:T{
Windows
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
string
T}
:T{
\fBDefault\fR
T}:T{
ndbd
T}
.TE
.sp 1
Causes an
\fBndbd\fR
process that was previously installed as a Windows service to be removed\&. Optionally, you can specify a name for the service to be uninstalled; if not set, the service name defaults to
ndbd\&.
.sp
The
\fB\-\-remove\fR
option has no effect on non\-Windows platforms\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-retries=\fR\fB\fI#\fR\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s
^ l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-connect\-retries=#
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
numeric
T}
:T{
\fBDefault\fR
T}:T{
12
T}
:T{
\fBMin Value\fR
T}:T{
0
T}
:T{
\fBMax Value\fR
T}:T{
65535
T}
.TE
.sp 1
Set the number of times to retry a connection before giving up; 0 means 1 attempt only (and no retries)\&. The default is 12 attempts\&. The time to wait between attempts is controlled by the
\fB\-\-connect\-retry\-delay\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-delay=\fR\fB\fI#\fR\fR
.TS
allbox tab(:);
l l s s
l l s s
l l l s
^ l l s
^ l l s
^ l l s.
T{
\fBDeprecated\fR
T}:T{
5\&.6\&.28\-ndb\-7\&.4\&.9
T}
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-connect\-delay=#
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
numeric
T}
:T{
\fBDefault\fR
T}:T{
5
T}
:T{
\fBMin Value\fR
T}:T{
0
T}
:T{
\fBMax Value\fR
T}:T{
3600
T}
.TE
.sp 1
Determines the time to wait between attempts to contact a management server when starting (the number of attempts is controlled by the
\fB\-\-connect\-retries\fR
option)\&. The default is 5 seconds\&.
.sp
This option is deprecated, and is subject to removal in a future release of NDB Cluster \&. Use
\fB\-\-connect\-retry\-delay\fR
instead\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-retry\-delay=\fR\fB\fI#\fR\fR
.TS
allbox tab(:);
l l s s
l l l s
^ l l s
^ l l s
^ l l s.
T{
\fBCommand\-Line Format\fR
T}:T{
\-\-connect\-retry\-delay=#
T}
T{
\fBPermitted Values\fR
T}:T{
\fBType\fR
T}:T{
numeric
T}
:T{
\fBDefault\fR
T}:T{
5
T}
:T{
\fBMin Value\fR
T}:T{
0
T}
:T{
\fBMax Value\fR
T}:T{
4294967295
T}
.TE
.sp 1
Determines the time to wait between attempts to contact a management server when starting (the time between attempts is controlled by the
\fB\-\-connect\-retries\fR
option)\&. The default is 5 seconds\&.
.sp
This option takes the place of the
\fB\-\-connect\-delay\fR
option, which is now deprecated and subject to removal in a future release of NDB Cluster \&.
.RE
.PP
\fBndbd\fR
generates a set of log files which are placed in the directory specified by
DataDir
in the
config\&.ini
configuration file\&.
.PP
These log files are listed below\&.
\fInode_id\fR
is and represents the node\*(Aqs unique identifier\&. For example,
ndb_2_error\&.log
is the error log generated by the data node whose node ID is
2\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ndb_\fInode_id\fR_error\&.log
is a file containing records of all crashes which the referenced
\fBndbd\fR
process has encountered\&. Each record in this file contains a brief error string and a reference to a trace file for this crash\&. A typical entry in this file might appear as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
Date/Time: Saturday 30 July 2004 \- 00:20:01
Type of error: error
Message: Internal program error (failed ndbrequire)
Fault ID: 2341
Problem data: DbtupFixAlloc\&.cpp
Object of reference: DBTUP (Line: 173)
ProgramName: NDB Kernel
ProcessID: 14909
TraceFile: ndb_2_trace\&.log\&.2
***EOM***
.fi
.if n \{\
.RE
.\}
.sp
Listings of possible
\fBndbd\fR
exit codes and messages generated when a data node process shuts down prematurely can be found in
\m[blue]\fBndbd Error Messages\fR\m[]\&\s-2\u[1]\d\s+2\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
\fIThe last entry in the error log file is not necessarily the newest one\fR
(nor is it likely to be)\&. Entries in the error log are
\fInot\fR
listed in chronological order; rather, they correspond to the order of the trace files as determined in the
ndb_\fInode_id\fR_trace\&.log\&.next
file (see below)\&. Error log entries are thus overwritten in a cyclical and not sequential fashion\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ndb_\fInode_id\fR_trace\&.log\&.\fItrace_id\fR
is a trace file describing exactly what happened just before the error occurred\&. This information is useful for analysis by the NDB Cluster development team\&.
.sp
It is possible to configure the number of these trace files that will be created before old files are overwritten\&.
\fItrace_id\fR
is a number which is incremented for each successive trace file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ndb_\fInode_id\fR_trace\&.log\&.next
is the file that keeps track of the next trace file number to be assigned\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ndb_\fInode_id\fR_out\&.log
is a file containing any data output by the
\fBndbd\fR
process\&. This file is created only if
\fBndbd\fR
is started as a daemon, which is the default behavior\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ndb_\fInode_id\fR\&.pid
is a file containing the process ID of the
\fBndbd\fR
process when started as a daemon\&. It also functions as a lock file to avoid the starting of nodes with the same identifier\&.
.RE
.sp
.RS 4
.ie n \{\