MySQL Cluster Tutorial - cdn.oreillystatic.com

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The status is one of NOTHING, CMVMI, STARTING, STARTED, SINGLEUSER, STOPPING_1, STOPPING_2, STOPPING_3, or STOPPING_4. If the status is set to STARTING then the start phase is also displayed. ndbinfo.transporters This is a view showing the status of the connection between each data node and each of the other nodes in the cluster (data nodes, management nodes, MySQL Server nodes and any NDB API applications): mysql> select * from transporters; +---------+----------------+--------------+ | node_id | remote_node_id | status | +---------+----------------+--------------+ | 3 | 1 | CONNECTED | | 3 | 3 | DISCONNECTED | | 3 | 4 | CONNECTED | | 3 | 102 | CONNECTED | | 3 | 103 | CONNECTING | | 3 | 104 | CONNECTING | | 4 | 1 | CONNECTED | | 4 | 3 | CONNECTED | | 4 | 4 | DISCONNECTED | | 4 | 102 | CONNECTED | | 4 | 103 | CONNECTING | | 4 | 104 | CONNECTING | +---------+----------------+--------------+ Exercise 1. Connect to Cluster using mysql client 2. open the ndbinfo database: mysql> use ndbinfo; 3. Check what tables are visible: 4. mysql> show tables; 5. Query the memory usage table: 6. mysql> select * from memoryusage; 7. Increase DataMemory in config.ini by 10% and restart 1 data node 8. Check memoryusage again mysql> select * from memoryusage; Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 42/81
NDB API NDB API Overview The NDB API is the real-time, C++ interface that provides access to the data held in the data nodes. Typically, applications access this through another layer (e.g. via a MySQL Server). The NDB APU is used extremely successfully by many mission-critical, real-time customer applications. You should consider using the NDB API if the following criteria are met: • C++ application • You need maximum real-time performance (latency & throughput) • Willing to accept added complexity in your application and lock-in to a proprietary interface The API is documented at: http://dev.mysql.com/doc/ndbapi/en/index.html There are a number of alternate ways to more easily exploit many of the performance benefits of the NDB API while making life easier for the developer: • back-ndb plugin for OpenLDAP • MySQL Cluster Connector for Java (including OpenJPA) • http plugin for Apache Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 43/81
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 and 16: ndb_mgm> show Connected to Manageme
Page 17 and 18: Administer MySQL Cluster MySQL Clus
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: For the redo log space, there is 1
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
Page 67 and 68: Main.java (part 4): em.close(); ent
Page 69 and 70: This fails with an error saying the
Page 71 and 72: Scaling and Performance MySQL Nodes
Page 73 and 74: Geographical Replication The MySQL
Page 75 and 76: You can, however, have a more reada
Page 77 and 78: shell> mysql mysql_A:(none)> SHOW M
Page 79 and 80: On the Slave we now issue the CHANG
Page 81: Security It should be noted right f

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