'\" t
.\"     Title: ndb_waiter
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 03/11/2024
.\"    Manual: MySQL Database System
.\"    Source: MySQL 8.4
.\"  Language: English
.\"
.TH "NDB_WAITER" "1" "03/11/2024" "MySQL 8\&.4" "MySQL Database System"
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.nh
.\" disable justification (adjust text to left margin only)
.ad l
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.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
ndb_waiter \- wait for NDB Cluster to reach a given status
.SH "SYNOPSIS"
.HP \w'\fBndb_waiter\ \fR\fB\fIoptions\fR\fR\ 'u
\fBndb_waiter \fR\fB\fIoptions\fR\fR
.SH "DESCRIPTION"
.PP
\fBndb_waiter\fR
repeatedly (each 100 milliseconds) prints out the status of all cluster data nodes until either the cluster reaches a given status or the
\fB\-\-timeout\fR
limit is exceeded, then exits\&. By default, it waits for the cluster to achieve
STARTED
status, in which all nodes have started and connected to the cluster\&. This can be overridden using the
\fB\-\-no\-contact\fR
and
\fB\-\-not\-started\fR
options\&.
.PP
The node states reported by this utility are as follows:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
NO_CONTACT: The node cannot be contacted\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
UNKNOWN: The node can be contacted, but its status is not yet known\&. Usually, this means that the node has received a
START
or
RESTART
command from the management server, but has not yet acted on it\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
NOT_STARTED: The node has stopped, but remains in contact with the cluster\&. This is seen when restarting the node using the management client\*(Aqs
RESTART
command\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
STARTING: The node\*(Aqs
\fBndbd\fR
process has started, but the node has not yet joined the cluster\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
STARTED: The node is operational, and has joined the cluster\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
SHUTTING_DOWN: The node is shutting down\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
SINGLE USER MODE: This is shown for all cluster data nodes when the cluster is in single user mode\&.
.RE
.PP
Options that can be used with
\fBndb_waiter\fR
are shown in the following table\&. Additional descriptions follow the table\&.
.PP
Usage
.sp
.if n \{\
.RS 4
.\}
.nf
ndb_waiter [\-c \fIconnection_string\fR]
.fi
.if n \{\
.RE
.\}
Additional Options
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-character\-sets\-dir\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--character-sets-dir=path
T}
.TE
.sp 1
Directory containing character sets\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-retries\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--connect-retries=#
T}
T{
Type
T}:T{
Integer
T}
T{
Default Value
T}:T{
12
T}
T{
Minimum Value
T}:T{
0
T}
T{
Maximum Value
T}:T{
12
T}
.TE
.sp 1
Number of times to retry connection before giving up\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-retry\-delay\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--connect-retry-delay=#
T}
T{
Type
T}:T{
Integer
T}
T{
Default Value
T}:T{
5
T}
T{
Minimum Value
T}:T{
0
T}
T{
Maximum Value
T}:T{
5
T}
.TE
.sp 1
Number of seconds to wait between attempts to contact management server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\-string\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--connect-string=connection_string
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Same as
\fB\-\-ndb\-connectstring\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-core\-file\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--core-file
T}
.TE
.sp 1
Write core file on error; used in debugging\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-extra\-file\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--defaults-extra-file=path
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Read given file after global files are read\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-file\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--defaults-file=path
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Read default options from given file only\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-group\-suffix\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--defaults-group-suffix=string
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Also read groups with concat(group, suffix)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-login\-path\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--login-path=path
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Read given path from login file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-login\-paths\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--no-login-paths
T}
.TE
.sp 1
Skips reading options from the login path file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-help\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--help
T}
.TE
.sp 1
Display help text and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-connectstring\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--ndb-connectstring=connection_string
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Set connection string for connecting to
\fBndb_mgmd\fR\&. Syntax:
[nodeid=\fIid\fR;][host=]\fIhostname\fR[:\fIport\fR]\&. Overrides entries in
NDB_CONNECTSTRING
and
my\&.cnf\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-mgm\-tls\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--ndb-mgm-tls=level
T}
T{
Type
T}:T{
Enumeration
T}
T{
Default Value
T}:T{
relaxed
T}
T{
Valid Values
T}:T{
.PP
relaxed
.PP
strict
T}
.TE
.sp 1
Sets the level of TLS support required to connect to the management server; one of
relaxed
or
strict\&.
relaxed
(the default) means that a TLS connection is attempted, but success is not required;
strict
means that TLS is required to connect\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-mgmd\-host\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--ndb-mgmd-host=connection_string
T}
T{
Type
T}:T{
String
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Same as \-\-\fBndb\-connectstring\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-nodeid\fR
.TS
allbox tab(:);
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--ndb-nodeid=#
T}
T{
Type
T}:T{
Integer
T}
T{
Default Value
T}:T{
[none]
T}
.TE
.sp 1
Set node ID for this node, overriding any ID set by
\fB\-\-ndb\-connectstring\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-optimized\-node\-selection\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--ndb-optimized-node-selection
T}
.TE
.sp 1
Enable optimizations for selection of nodes for transactions\&. Enabled by default; use
\fB\-\-skip\-ndb\-optimized\-node\-selection\fR
to disable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-tls\-search\-path\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--ndb-tls-search-path=list
T}
T{
Type
T}:T{
Path name
T}
T{
Default Value (Unix)
T}:T{
$HOME/ndb-tls
T}
T{
Default Value (Windows)
T}:T{
$HOMEDIR/ndb-tls
T}
.TE
.sp 1
Specify a list of directories to search for a CA file\&. On Unix platforms, the directory names are separated by colons (:); on Windows systems, the semicolon character (;) is used as the separator\&. A directory reference may be relative or absolute; it may contain one or more environment variables, each denoted by a prefixed dollar sign ($), and expanded prior to use\&.
.sp
Searching begins with the leftmost named directory and proceeds from left to right until a file is found\&. An empty string denotes an empty search path, which causes all searches to fail\&. A string consisting of a single dot (\&.) indicates that the search path limited to the current working directory\&.
.sp
If no search path is supplied, the compiled\-in default value is used\&. This value depends on the platform used: On Windows, this is
\endb\-tls; on other platforms (including Linux), it is
$HOME/ndb\-tls\&. This can be overridden by compiling NDB Cluster using
\fB\-DWITH_NDB_TLS_SEARCH_PATH\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-contact\fR,
\fB\-n\fR
Instead of waiting for the
STARTED
state,
\fBndb_waiter\fR
continues running until the cluster reaches
NO_CONTACT
status before exiting\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-defaults\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--no-defaults
T}
.TE
.sp 1
Do not read default options from any option file other than login file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-not\-started\fR
Instead of waiting for the
STARTED
state,
\fBndb_waiter\fR
continues running until the cluster reaches
NOT_STARTED
status before exiting\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-nowait\-nodes=\fR\fB\fIlist\fR\fR
When this option is used,
\fBndb_waiter\fR
does not wait for the nodes whose IDs are listed\&. The list is comma\-delimited; ranges can be indicated by dashes, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBndb_waiter \-\-nowait\-nodes=1,3,7\-9\fR
.fi
.if n \{\
.RE
.\}
.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
\fInot\fR
use this option together with the
\fB\-\-wait\-nodes\fR
option\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print\-defaults\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--print-defaults
T}
.TE
.sp 1
Print program argument list and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-timeout=\fR\fB\fIseconds\fR\fR,
\fB\-t \fR\fB\fIseconds\fR\fR
Time to wait\&. The program exits if the desired state is not achieved within this number of seconds\&. The default is 120 seconds (1200 reporting cycles)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-single\-user\fR
The program waits for the cluster to enter single user mode\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-usage\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--usage
T}
.TE
.sp 1
Display help text and exit; same as
\fB\-\-help\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verbose\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--verbose=#
T}
T{
Type
T}:T{
Integer
T}
T{
Default Value
T}:T{
2
T}
T{
Minimum Value
T}:T{
0
T}
T{
Maximum Value
T}:T{
2
T}
.TE
.sp 1
Controls verbosity level of printout\&. Possible levels and their effects are listed here:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
0: Do not print (return exit code only; see following for exit codes)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
1: Print final connection status only\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
2: Print status each time it is checked\&.
.sp
This is the same behavior as in versions of NDB Cluster previous to 8\&.4\&.
.RE
.sp
Exit codes returned by
\fBndb_waiter\fR
are listed here, with their meanings:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
0: Success\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
1: Wait timed out\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
2: Parameter error, such as an invalid node ID\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
3: Failed to connect to the management server\&.
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-version\fR
.TS
allbox tab(:);
lB l.
T{
Command-Line Format
T}:T{
--version
T}
.TE
.sp 1
Display version information and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-wait\-nodes=\fR\fB\fIlist\fR\fR,
\fB\-w \fR\fB\fIlist\fR\fR
When this option is used,
\fBndb_waiter\fR
waits only for the nodes whose IDs are listed\&. The list is comma\-delimited; ranges can be indicated by dashes, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBndb_waiter \-\-wait\-nodes=2,4\-6,10\fR
.fi
.if n \{\
.RE
.\}
.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
\fInot\fR
use this option together with the
\fB\-\-nowait\-nodes\fR
option\&.
.sp .5v
.RE
.RE
.PP
\fBSample Output\fR. Shown here is the output from
\fBndb_waiter\fR
when run against a 4\-node cluster in which two nodes have been shut down and then started again manually\&. Duplicate reports (indicated by
\&.\&.\&.) are omitted\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fB\&./ndb_waiter \-c localhost\fR
Connecting to mgmsrv at (localhost)
State node 1 STARTED
State node 2 NO_CONTACT
State node 3 STARTED
State node 4 NO_CONTACT
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 UNKNOWN
State node 3 STARTED
State node 4 NO_CONTACT
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 STARTING
State node 3 STARTED
State node 4 NO_CONTACT
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 STARTING
State node 3 STARTED
State node 4 UNKNOWN
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 STARTING
State node 3 STARTED
State node 4 STARTING
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 STARTED
State node 3 STARTED
State node 4 STARTING
Waiting for cluster enter state STARTED
\&.\&.\&.
State node 1 STARTED
State node 2 STARTED
State node 3 STARTED
State node 4 STARTED
Waiting for cluster enter state STARTED
.fi
.if n \{\
.RE
.\}
.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
If no connection string is specified, then
\fBndb_waiter\fR
tries to connect to a management on
localhost, and reports
Connecting to mgmsrv at (null)\&.
.sp .5v
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2024, Oracle and/or its affiliates.
.PP
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.
.PP
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.
.PP
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/.
.sp
.SH "SEE ALSO"
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/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).