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Linux 2.6 - man page for ndb_waiter (linux section 1)

NDB_WAITER(1)			      MySQL Database System			    NDB_WAITER(1)

NAME
       ndb_waiter - wait for MySQL Cluster to reach a given status

SYNOPSIS
       ndb_waiter options

DESCRIPTION
       ndb_waiter repeatedly (each 100 milliseconds) prints out the status of all cluster data
       nodes until either the cluster reaches a given status or the --timeout 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
       --no-contact and --not-started options.

       The node states reported by this utility are as follows:

       o   NO_CONTACT: The node cannot be contacted.

       o   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.

       o   NOT_STARTED: The node has stopped, but remains in contact with the cluster. This is
	   seen when restarting the node using the management client's RESTART command.

       o   STARTING: The node's ndbd process has started, but the node has not yet joined the
	   cluster.

       o   STARTED: The node is operational, and has joined the cluster.

       o   SHUTTING_DOWN: The node is shutting down.

       o   SINGLE USER MODE: This is shown for all cluster data nodes when the cluster is in
	   single user mode.

       The following table includes options that are specific to the MySQL Cluster native backup
       restoration program ndb_waiter. Additional descriptions follow the table. For options
       common to most MySQL Cluster programs (including ndb_waiter), see Options Common to MySQL
       Cluster Programs(1).

       Table 17.28. ndb_waiter Options and Variables: MySQL Cluster NDB 7.2
       +---------------------+--------------------------+-----------------------+
       |Format		     | Description		| Added / Removed	|
       +---------------------+--------------------------+-----------------------+
       |		     | Wait for cluster to	|			|
       |       --no-contact, | reach NO CONTACT state	|	 All MySQL 5.5	|
       |		     |				|	 based releases |
       |       -n	     |				|			|
       +---------------------+--------------------------+-----------------------+
       |		     | Wait for cluster to	|			|
       |       --not-started | reach NOT STARTED state	|	 All MySQL 5.5	|
       |		     |				|	 based releases |
       +---------------------+--------------------------+-----------------------+
       |		     | Wait for cluster to	|			|
       |       --single-user | enter single user mode	|	 All MySQL 5.5	|
       |		     |				|	 based releases |
       +---------------------+--------------------------+-----------------------+
       |		     | Wait this many seconds,	|			|
       |       --timeout=#,  | then exit whether or not |	 All MySQL 5.5	|
       |		     | cluster has reached	|	 based releases |
       |       -t	     |		   desired	|			|
       |		     | state; default is 2	|			|
       |		     | minutes (120 seconds)	|			|
       +---------------------+--------------------------+-----------------------+
       |		     | List of nodes not to be	|			|
       |       --nowait-     | waited for.		|	 All MySQL 5.5	|
       |       nodes=list    |				|	 based releases |
       +---------------------+--------------------------+-----------------------+
       |		     | List of nodes to be	|			|
       |       --wait-	     | waited for.		|	 All MySQL 5.5	|
       |       nodes=list,   |				|	 based releases |
       |		     |				|			|
       |       -w	     |				|			|
       +---------------------+--------------------------+-----------------------+
	       Usage

	   ndb_waiter [-c connect_string]
	       Additional Options

       o   --no-contact, -n

	   Instead of waiting for the STARTED state, ndb_waiter continues running until the
	   cluster reaches NO_CONTACT status before exiting.

       o   --not-started

	   Instead of waiting for the STARTED state, ndb_waiter continues running until the
	   cluster reaches NOT_STARTED status before exiting.

       o   --timeout=seconds, -t seconds

	   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).

       o   --single-user

	   The program waits for the cluster to enter single user mode.

       o   --nowait-nodes=list

	   When this option is used, ndb_waiter does not wait for the nodes whose IDs are listed.
	   The list is comma-delimited; ranges can be indicated by dashes, as shown here:

	       shell> ndb_waiter --nowait-nodes=1,3,7-9

	       Important
	       Do not use this option together with the --wait-nodes option.

       o   --wait-nodes=list, -w list

	   When this option is used, ndb_waiter waits only for the nodes whose IDs are listed.
	   The list is comma-delimited; ranges can be indicated by dashes, as shown here:

	       shell> ndb_waiter --wait-nodes=2,4-6,10

	       Important
	       Do not use this option together with the --nowait-nodes option.

       Sample Output. Shown here is the output from ndb_waiter 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.

	   shell> ./ndb_waiter -c localhost
	   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
	   NDBT_ProgramExit: 0 - OK

	   Note
	   If no connection string is specified, then ndb_waiter tries to connect to a management
	   on localhost, and reports Connecting to mgmsrv at (null).

COPYRIGHT
       Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

       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/.

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/.

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

MySQL 5.5				    01/30/2014				    NDB_WAITER(1)


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