NDB_WAITER(1) MySQL Database System NDB_WAITER(1)NAMEndb_waiter - wait for cluster to reach a given status
SYNOPSISndb_waiter options
DESCRIPTIONndb_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 (see Additional Options).
The node states reported by this utility are as follows:
· NO_CONTACT: The node cannot be contacted.
· 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.
· 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.
· STARTING: The node's ndbd process has started, but the node has not
yet joined the cluster.
· STARTED: The node is operational, and has joined the cluster.
· SHUTTING_DOWN: The node is shutting down.
· SINGLE USER MODE: This is shown for all cluster data nodes when the
cluster is in single user mode.
Usage:ndb_waiter [-c connect_string]
Additional Options:
· --no-contact, -n
Instead of waiting for the STARTED state, ndb_waiter continues running
until the cluster reaches NO_CONTACT status before exiting.
· --not-started
Instead of waiting for the STARTED state, ndb_waiter continues running
until the cluster reaches NOT_STARTED status before exiting.
· --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).
Sample Output. Shown here is the output from ndb_waiter when run against a4-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
NoteIf no connectstring is specified, then ndb_waiter tries to connect to a
management on localhost, and reports Connecting to mgmsrv at (null).
COPYRIGHT
Copyright 2007-2008 MySQL AB
This documentation is free software; you can redistribute it and/or
modify it 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
MySQL AB (http://www.mysql.com/).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬────────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼────────────────────────────────────┤
│Availability │ SUNWmysqlr, SUNWmysqlu, SUNWmysqlt │
├────────────────────┼────────────────────────────────────┤
│Interface Stability │ Obsolete External │
└────────────────────┴────────────────────────────────────┘
NOTES
Source for mysql is available in the SUNWmysqlS package.
MySQL 4.1 04/13/2008 NDB_WAITER(1)
