MySQL Cluster Connection Strings-opracowanie

MySQL Cluster Connection Strings
With the exception of the MySQL Cluster management server (ndb_mgmd), each node that is part
of a MySQL Cluster requires a connection string that points to the management server's location.
This connection string is used in establishing a connection to the management server as well as in
performing other tasks depending on the node's role in the cluster. The syntax for a connection string is
as follows:
[nodeid=node_id, ]host-definition[, host-definition[, ...]]
host-definition:
host_name[:port_number]
node_id is an integer greater than or equal to 1 which identifies a node in config.ini. host_name
is a string representing a valid Internet host name or IP address. port_number is an integer referring
to a TCP/IP port number.
example 1 (long): "nodeid=2,myhost1:1100,myhost2:1100,192.168.0.3:1200"
example 2 (short): "myhost1"
localhost:1186 is used as the default connection string value if none is provided. If port_num is
omitted from the connection string, the default port is 1186. This port should always be available on the
network because it has been assigned by IANA for this purpose (see http://www.iana.org/assignments/
port-numbers for details).
By listing multiple host definitions, it is possible to designate several redundant management servers. A
MySQL Cluster data or API node attempts to contact successive management servers on each host in
the order specified, until a successful connection has been established.
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