Memcache Integration with Innodb
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The document discusses integrating Memcache with InnoDB. It provides an overview of Memcache and InnoDB, why to use the Memcache plugin for InnoDB, how to install and configure the plugin, how it works, limitations, and includes a demo. The presenter is Runish Kumar from Mindfire Solutions and the presentation covers the basics of using Memcache as a caching layer for InnoDB tables in MySQL.
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Memcache Integration with Innodb
- 1. Memcache Integration with Innodb Presenter: Runish Kumar, Mindfire Solutions Date: 15/09/2014
- 2. Presenter: Runish Kumar, Mindfire Solutions About Me Zend Certified PHP developer vSkills Certified Python developer Skills: PHP, Python, MySQL, Ubuntu, Memcache, Apache Connect with me: Facebook: https://www.facebook.com/runishkumar LinkedIn: https://www.linkedin.com/in/runishkumar Twitter: https://twitter.com/runishkumar Contact me: Email: [email protected], [email protected] Skype: mfsi_runishk
- 3. Agenda • Introduction to Innodb integration with memcache • Why to use memcached plugin • Installation and setup Presenter: Runish Kumar, Mindfire Solutions • How it works • Demo • Limitations • Q&A
- 4. • InnoDB is a general-purpose storage engine that balances high reliability and high performance. • Memcached is a general-purpose distributed memory caching system. • InnoDB Memcached daemon provides a way to interact with Innodb tables using memcached protocol. • Introduced in MySQL5.6 • No-SQL in MySQL? Presenter: Runish Kumar, Mindfire Solutions
- 5. • Provides direct access to InnoDB table eliminating SQL processing. • Can be used for caching data. Communication with InnoDB is handled out of the box by the plugin. • Provides combination of performace (by caching data in to memory) and persistance (by writing all data to InnoDB). • Data can still be accessed through conventional SQL query. • Gives us the ability to fetch any record fast using primary key from memcache. At the same time we can do aggregation operation on same data using SQL query if needed. Presenter: Runish Kumar, Mindfire Solutions
- 6. Installation and Setup Prerequisite: • Must have libevent installed • Can be installed with sudo apt-get install libevent-dev • plugin/libmemcached.so and plugin/innodb_engine.so must be present under mysql plugin folder Presenter: Runish Kumar, Mindfire Solutions
- 7. Two ways to get plugin files: • Install MySQL from package manager http://dev.mysql.com/doc/mysql-apt-repo-quick-guide/en/ • Compile MySQL from source http://dev.mysql.com/doc/refman/5.6/en/source-installation.html Build with -DWITH_INNODB_MEMCACHED=ON option. Optionally you can also add option -DWITH_LIBEVENT if libevent is not installed in your machine. Presenter: Runish Kumar, Mindfire Solutions
- 8. Installation: mysql> source MYSQL_HOME/share/innodb_memcached_config.sql; mysql> install plugin daemon_memcached soname "libmemcached.so"; UnInstallation: mysql> uninstall plugin daemon_memcached; Presenter: Runish Kumar, Mindfire Solutions
- 9. Setup/Configuration options: • Run memcahe daemon on port of your choice --daemon_memcached_option="-p11222" • daemon_memcached_r_batch_size, batch commit size for read operations (get) • daemon_memcached_w_batch_size, batch commit for any write operations (set, replace, append, prepend,incr, decr, and so on) Presenter: Runish Kumar, Mindfire Solutions
- 10. How It Works? Presenter: Runish Kumar, Mindfire Solutions
- 11. Try a demo :) • Memcache key can not contain spaces or new line character. • Numeric values gets converted to string when it passes through memcache plugin. Cast it to back to numeric value before using it in arithmatic operation. e.g, SUM(), AVG() etc. • If the InnoDB column you use as a key can be longer than 250 bytes, hash it to a value that is less than 250 bytes. • If primary key of table is short, we can use it as lookup key for memcache. Presenter: Runish Kumar, Mindfire Solutions
- 12. Limitations • You cannot use a partitioned table for data queried or stored through the memcached interface. • All fileds mapped with memcache has to be varchar. • Complex queries can not be performed using memcache plugin. • Aggregation operation can not be performed through memcache plugin. • Security Concerns. Presenter: Runish Kumar, Mindfire Solutions
- 13. Question and Answer Presenter: Runish Kumar, Mindfire Solutions
- 14. Presenter: Runish Kumar, Mindfire Solutions
- 15. Thank you Presenter: Runish Kumar, Mindfire Solutions
- 16. www.mindfiresolutions.com https://www.facebook.com/MindfireSolutions http://www.linkedin.com/company/mindfire-solutions http://twitter.com/mindfires