MySQL Cluster Tutorial - cdn.oreillystatic.com

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Exercise: Using the configuration files already created in previous exercise (all nodes on a single host): 1. Start the management nodes 2. Check the status 3. Start the data nodes and wait for them to start 4. Start the MySQL Servers 5. Connect to a MySQL Server, create a Cluster table (engine=ndb) 6. Add a tuple 7. Check the data is visible when using the other MySQL Server. Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 16/81
Administer MySQL Cluster MySQL Cluster has a command line tool to talk directly to the management server to obtain information and execute basic functions. It also has a verbose logging system which can help diagnose many problems with the cluster. NDB_MGM A key tool for running basic administration tasks is ndb_mgm. This is a command line tool to send basic commands to the cluster. It communicates to the management nodes using an unsecured port with no authentication (take note this should be done behind a firewall or private network). To invoke this tool simply run: shell> ndb_mgm If you are not running it locally to the management node then you will need to give it a connect string: shell> ndb_mgm --ndb-connectstring=192.168.1.10 You can also execute a one-time command with this tool rather than getting a command prompt using: shell> ndb_mgm -e 'SHOW' Commands in ndb_mgm almost all follow a common syntax. Many commands require node IDs, some do not, so the syntax is typically as follows: ndb_mgm> [node_id] {command} [parameters] The node_id can be any single node ID or the keyword 'ALL' to send it to all data nodes. Common Commands SHOW This command gives a quick overview of the status of all the nodes, whether or not they are connected and up/down. For example: ndb_mgm> show Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=2 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2, Nodegroup: 0, Master) id=3 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s) id=1 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2) [mysqld(API)] 2 node(s) id=4 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2) id=5 (not connected, accepting connect from any host) If the data nodes are currently starting you will see this reflected in this status as follows: [ndbd(NDB)] 2 node(s) id=2 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2, starting, Nodegroup: 0, Master) id=3 @127.0.0.1 (mysql-5.1.41 ndb-7.1.2, starting, Nodegroup: 0) Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 17/81
Page 1 and 2: MySQL Cluster Tutorial O’Reilly M
Page 3 and 4: ndbinfo Data Node Statistics! 39 nd
Page 5 and 6: Introduction MySQL Cluster is a too
Page 7 and 8: MySQL Cluster in short • MySQL Cl
Page 9 and 10: Installation and Configuration In t
Page 11 and 12: Configuration my_Slave.cnf Configur
Page 13 and 14: Starting & Using MySQL Cluster Star
Page 15: ndb_mgm> show Connected to Manageme
Page 19 and 20: ndb_mgm> 2 restart Node 2: Node shu
Page 21 and 22: to load problems such as timing iss
Page 23 and 24: MySQL Cluster Manager MySQL Cluster
Page 25 and 26: • The management node(s) can cont
Page 27 and 28: Example configuration Throughout th
Page 29 and 30: example, the MySQL Cluster installa
Page 31 and 32: 3. Fetch the port parameter to conn
Page 33 and 34: Introducing MySQL Cluster Manager t
Page 35 and 36: within 4 heartbeat intervals. This
Page 37 and 38: • Stored routines and other none
Page 39 and 40: NDB Info ndbinfo Data Node Statisti
Page 41 and 42: For the redo log space, there is 1
Page 43 and 44: NDB API NDB API Overview The NDB AP
Page 45 and 46: static void run_application(MYSQL &
Page 47 and 48: const NdbDictionary::Index *myPInde
Page 49 and 50: MySQL Cluster Connector for Java Te
Page 51 and 52: • SessionFactory: There is one in
Page 53 and 54: Figure 4: Performance of OpenJPA Ad
Page 55 and 56: config.ini: [ndbd default]noofrepli
Page 57 and 58: The next step is to write the appli
Page 59 and 60: mysql> select * from clusterdb.empl
Page 61 and 62: Compiling and running the ClusterJ
Page 63 and 64: Employee.java: import javax.persist
Page 65 and 66: Main.java (part 2): userTransaction
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Main.java (part 4): em.close(); ent
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This fails with an error saying the
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Scaling and Performance MySQL Nodes
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Geographical Replication The MySQL
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You can, however, have a more reada
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shell> mysql mysql_A:(none)> SHOW M
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On the Slave we now issue the CHANG
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Security It should be noted right f
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