Webinar slides: Introduction to Database Proxies (for MySQL)
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Watch this on-demand webinar on database proxies (for MySQL) by Gilles Rayrat, VP of Engineering at Continuent. Gilles is one of the most knowledgeable experts in the MySQL community when it comes to database proxies and shares some of his knowledge in this initial webinar on that topic. From a simple database connectivity scenario all the way through to advanced database connectivity setups and proxy functionalities, this webinar provides an in-depth introduction to database proxies (for MySQL). AGENDA - A simple database connectivity scenario - The concept of a clustered database - Failure in a clustered database: the nightmare scenario - The solution: use a proxy! Preferably a smart one … - Advanced database connectivity setups - Advanced proxy functionalities - Recap SPEAKER Gilles Rayrat, VP of Engineering, Continuent, has over 20 years experience in software engineering. Previously holding positions at Orange and Xerox, he joined the Continuent adventure in 2005. As the connectivity expert at Continuent, he has worn many hats including software development, QA, support, project and operations management. Gilles has held most of the engineering positions that he now manages, giving him both deep and wide experience.
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Webinar slides: Introduction to Database Proxies (for MySQL)
- 1. The MySQL Availability Company INTRODUCTION TO DATABASE PROXIES Why do we need Proxy in the First Place? Smarter Proxies are Better! Gilles Rayrat
- 2. About the Presenter Gilles Rayrat VP of Engineering Co-author and main developer of the Tungsten Connector
- 4. A Simple Scenario Applications that need a database server will access it directly Application / database stack Application Database
- 5. A Simple Scenario Applications that need a database server will access it directly • Read and Writes are going to the same node Application
- 6. A Simple Scenario Applications that need a database server will access it directly • Read and Writes are going to the same node • No need for intermediate layers Application
- 7. A Simple Scenario Applications that need a database server will access it directly • Read and Writes are going to the same node • No need for intermediate layers • If the database fails… Application
- 8. Failure in a Simple Scenario Applications that need a database server will access it directly • Read and Writes are going to the same node • No need for intermediate layers • If the database fails… the application breaks Application
- 10. A Clustered Database With a cluster of databases, there is at least one master and some slaves Application
- 11. A Clustered Database With a cluster of databases, there is at least one master and some slaves • Simple applications will access a unique database instance: the master Application
- 12. A Clustered Database With a cluster of databases, there is at least one master and some slaves • Simple applications will access a unique database instance: the master • Smarter applications can read from slaves Smart Application
- 13. Failure in a Clustered Database Clusters are designed to survive failuresApplication
- 14. Failure in a Clustered Database Clusters are designed to survive failures Applications not! Application
- 15. Failure in a Clustered Database Clusters are designed to survive failures Applications not! They need to be reconfigured Application
- 16. Failure in a Clustered Database Clusters are designed to survive failures • Applications not! They need to be reconfigured • The more intelligence… Smart Application
- 17. Failure in a Clustered Database Clusters are designed to survive failures • Applications not! They need to be reconfigured • The more intelligence… the more difficulties Smart Application
- 18. Failure in a Clustered Database Clusters are designed to survive failures • Applications not! They need to be reconfigured • The more intelligence… the more difficulties • The more applications… the more headaches! Smart Application Smart Application Smart Application
- 19. Nightmare Scenario Replication working OK quote #123, amount $12,000 quote #123, amount $12,000 Application
- 20. Nightmare Scenario Replication working OK … but applications wrongly configured! Application Application quote #123, amount $12,000 quote #123, amount $25,000
- 21. Nightmare Scenario Replication working OK … but applications wrongly configured! Imagine millions of records like this!!! Application Application quote #123, amount $12,000 quote #123, amount $25,000
- 22. SOLUTION: USE A PROXY. PREFERABLY SMART PROXY!
- 23. A Clustered Database Cluster of databases, one master and 2 slaves Application / database stack Application
- 24. A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application Application Proxy
- 25. Proxy A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application • Good proxies make clusters appear like a single database Application
- 26. A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application • Good proxies make clusters appear like a single database • The plumbing behind is hidden to the application Application Proxy
- 27. A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application • Good proxies make clusters appear like a single database • The plumbing behind is hidden to the application • Including after failover Application Proxy
- 28. A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application • Good proxies make clusters appear like a single database • The plumbing behind is hidden to the application • Including after failover => the app<>proxy connection is not broken! Application Proxy
- 29. A Clustered Database Cluster of databases, one master and 2 slaves • A proxy is a middle layer sitting between the database and the application • Good proxies make clusters appear like a single database • The plumbing behind is hidden to the application • Including after failover => the app<>proxy connection is not broken! Tungsten Proxy will re-route database requests to the new master… with no downtime! Application Proxy
- 30. A Clustered Database Smart proxies… • … can serve smart applications Smart Application Smart Proxy
- 31. A Clustered Database Smart proxies… • … can serve smart applications Smarter proxies… Application Smart Proxy
- 32. A Clustered Database Smart proxies… • … can serve smart applications Smarter proxies… • … can serve simple applications Application Smart Proxy
- 33. A Clustered Database Smart proxies… • … can serve smart applications Smarter proxies… • … can serve simple applications • By identifying the read operations and sending read traffic to slaves Application Smart Proxy
- 34. ADVANCED DATABASE CONNECTIVITY SETUPS
- 35. DR setup Composite Master/Slave setup Application Proxy
- 36. DR setup Composite Master/Slave setup Application Proxy Application Proxy Zone 1 Zone 2
- 37. DR setup Composite Master/Slave setup Applications sitting on each site Application Proxy Application Proxy Zone 1 Zone 2
- 38. DR setup Composite Master/Slave setup Applications sitting on each site • All writes must go to the (unique) master Application Proxy Application Proxy Zone 1 Zone 2
- 39. DR setup Composite Master/Slave setup Applications sitting on each site • All writes must go to the (unique) master • Reads can remain local! Btw: Only Tungsten can do that… Application Proxy Application Proxy Zone 1 Zone 2
- 41. Multi-Master Composite Multi-Master setup • Writes go to the local master Application Proxy Application Proxy Zone 1 Zone 2
- 42. Multi-Master Composite Multi-Master setup • Writes go to the local master • Reads stay local as well Again, a Continuent exclusive feature! Application Proxy Application Proxy Zone 1 Zone 2
- 44. Team Work Tungsten is a clustering suite Application Proxy Application Proxy
- 45. Team Work Tungsten is a clustering suite Application Proxy Application Proxy Manager Replicator Manager Replicator Manager Replicator
- 46. Team Work Tungsten is a clustering suite • Managers know about the cluster • Connectors get cluster information from Managers Application Proxy Application Proxy Manager Replicator Manager Replicator Manager Replicator
- 48. Advanced functionalities Bridge mode • Provides access to “the master” or “a slave” Application Tungsten Proxy
- 49. Tungsten Proxy Advanced functionalities Bridge mode • Provides access to “the master” or “a slave” • Totally transparent Application
- 50. Tungsten Proxy Advanced functionalities Bridge mode • Provides access to “the master” or “a slave” • Totally transparent • No automated read/write splitting Application
- 51. Tungsten Proxy Advanced functionalities Bridge mode • Provides access to “the master” or “a slave” • Totally transparent • No automated read/write splitting • Error appear to the application upon failure Application
- 52. Tungsten Proxy Advanced functionalities Bridge mode • Provides access to “the master” or “a slave” • Totally transparent • No automated read/write splitting • Error appear to the application upon failure • Super Fast Application
- 54. Advanced functionalities SmartScale • The problem with reading from slaves: • After a write occurs: Application record R Tungsten Proxy
- 55. Advanced functionalities SmartScale • The problem with reading from slaves: • After a write occurs: Replication lag Application R R R Tungsten Proxy
- 56. Advanced functionalities SmartScale • The problem with reading from slaves: • After a write occurs: Replication lag • Smart scale makes sure the data written by the application is available on the slave Application R Tungsten Proxy
- 57. Advanced functionalities SmartScale • The problem with reading from slaves: • After a write occurs: Replication lag • Smart scale makes sure the data written by the application is available on the slave Application R R? Tungsten Proxy
- 58. Advanced functionalities SmartScale • The problem with reading from slaves: • After a write occurs: Replication lag • Smart scale makes sure the data written by the application is available on the slave • If not reads from master Application R R Tungsten Proxy
- 59. RECAP
- 60. Recap Proxies make clusters appear as simple Databases to applications Application Proxy
- 61. Recap Proxies make clusters appear as simple Databases to applications Even in complex topologies Application Proxy
- 62. Recap Proxies make clusters appear as simple Databases to applications Even in complex topologies With read scaling optimizations Application Proxy
- 63. For More Info… Product and General Information: info@continuent.com Sales Requests: sales@continuent.com
- 64. THANK YOU FOR LISTENING continuent.com The MySQL Availability Company Gilles Rayrat