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Introduction to MySQL InnoDB Cluster

Frederic Descamps
Frederic Descamps

The document discusses MySQL InnoDB Cluster, which provides high availability and scaling features for MySQL. It uses Group Replication under the hood, which allows data to be written simultaneously across cluster nodes while maintaining consistency. By default, MySQL InnoDB Cluster runs in Single Primary Mode, where one node acts as the primary/writable node and others act as hot standbys through an automated leader election process.

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MySQL InnoDB Cluster MySQL High Availability made easy August 2017   Frédéric Descamps - MySQL Community Manager - Oracle 3 / 84
  Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purpose only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied up in making purchasing decisions. The development, release and timing of any features or functionality described for Oracle´s product remains at the sole discretion of Oracle. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 4 / 84
about.me/lefred Who am I ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 5 / 84
Frédéric Descamps @lefred MySQL Evangelist Hacking MySQL since 3.23 devops believer MySQL Community Manager since May 2016 living in Belgium 🇧🇪 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 6 / 84
100%   virtually all organizations require their most critical systems to be highly available ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 7 / 84
    "HighAvailabilitybecomesacorefirst classfeatureofMySQL!" MySQL InnoDB Cluster   Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 8 / 84
MySQL InnoDB Cluster: vision   "Asingleproduct-MySQL-withhighavailabilityandscalingfeaturesbakedin;providing anintegratedend-to-endsolutionthatiseasytouse." Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 9 / 84
MySQL InnoDB Cluster: vision   "Asingleproduct-MySQL-withhighavailabilityandscalingfeaturesbakedin;providing anintegratedend-to-endsolutionthatiseasytouse." InnoDB cluster Ease-of-Use Extreme Scale-Out Out-of-Box Solution Built-in HA High Performance Everything Integrated Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 10 / 84
One Product: MySQL All components created together Tested together Packaged together Easy to Use One client: MySQL Shell Easy packaging Integrated orchestration Homogenous servers Flexible and Moden SQL and NoSQL together Protocol Buffers Asynchronous API Developer friendly Support Read/Write Scale Out Shared clusters Federated systemof N replica sets supporting cross shard operations Each replica set manages a shard MySQL InnoDB Cluster: goals Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 11 / 84
Our vision in 4 steps MySQLDocumentStore Relational&DocumentModels MySQLHA Out-Of-BoxHA ReadScale-Out AsyncReplication+AutoFailover WriteScale-Out Sharding E1 E3 E2 E4 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 12 / 84
Step 2´s Architecture Application MySQL Connector MySQL Router MySQL Shell InnoDB cluster Application MySQL Connector MySQL Router Mp M M Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 13 / 84
Step 3´s Architecture Application MySQL Connector MySQL Router MySQL Shell InnoDB cluster Application MySQL Connector MySQL Router Mp M M S1 S2 S3 S4 S... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 14 / 84
Step 4´s Architecture Application MySQL Connector MySQL Router MySQL Shell Application MySQL Connector MySQL Router InnoDB cluster Mp M M S2 S3 S4 S...S1 InnoDB cluster Mp M M S1 S2 S3 S4 S... InnoDB cluster Mp M M S1 S2 S3 S4 S... Application MySQL Connector MySQL Router Application MySQL Connector MySQL Router Application MySQL Connector MySQL Router replicaset1 replicaset2 replicaset3 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 15 / 84
Group Replication: heart of MySQL InnoDB Cluster Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 16 / 84
Group Replication: heart of MySQL InnoDB Cluster Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 17 / 84
MySQL Group Replication but what is it ?!? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 18 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 19 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 20 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 21 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 22 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 23 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution GR allows automatic distributed recovery Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 24 / 84
MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution GR allows automatic distributed recovery Supported on all MySQL platforms !! Linux, Windows, Solaris, OSX, FreeBSD Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 25 / 84
And for users ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 26 / 84
And for users ? no longer necessary to handle server fail-over manually or with a complicated script Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 27 / 84
And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 28 / 84
And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 29 / 84
And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups GR handles crashes, failures, re-connetcs automatically Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 30 / 84
And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups GR handles crashes, failures, re-connetcs automatically Allows an easy setup of a MySQL service high available ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 31 / 84
OK, but how does it work ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 32 / 84
OK, but how does it work ? it´s just ... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 33 / 84
OK, but how does it work ? it´s just ... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 34 / 84
OK, but how does it work ? it´s just ... ... no, in fact the writesets replication is synchronous and then certification and apply of the changes are local to each nodes and asynchronous. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 35 / 84
OK, but how does it work ? it´s just ... ... no, in fact the writesets replication is synchronous and then certification and apply of the changes are local to each nodes and asynchronous. not that easy to understand... right ? As a picture is worth a 1000 words, let´s illustrate this... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 36 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 37 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 38 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 39 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 40 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 41 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 42 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 43 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 44 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 45 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 46 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 47 / 84
MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 48 / 84
Certification Certification is the process that only needs to answer the following unique question: Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 49 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 50 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 51 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 52 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 53 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 54 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 55 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 56 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 57 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction serialized by the total order in GCS/XCOM+ GTID Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 58 / 84
Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction serialized by the total order in GCS/XCOM+ GTID cost is based on trx size (# rows &# keys) Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 59 / 84
Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 60 / 84
Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. mysql> show global variables like 'group_replication_single_primary_mode'; +---------------------------------------+-------+ | Variable_name | Value | +---------------------------------------+-------+ | group_replication_single_primary_mode | ON | +---------------------------------------+-------+ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 61 / 84
Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. mysql> show global variables like 'group_replication_single_primary_mode'; +---------------------------------------+-------+ | Variable_name | Value | +---------------------------------------+-------+ | group_replication_single_primary_mode | ON | +---------------------------------------+-------+ In Single Primary Mode, a single member acts as the writable master (PRIMARY) and the rest of the members act as hot-standbys (SECONDARY). The group itself coordinates and configures itself automatically to determine which member will act as the PRIMARY, through a leader election mechanism. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 62 / 84
Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 63 / 84
Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). more visibility Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 64 / 84
Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). more visibility mysql-sql> select * from performance_schema.replication_group_members; +--------------+--------------+--------+------+---------+-------------+-------+ | CHANNEL_NAME | MEMBER_ID | M_HOST | PORT | M_STATE | MEMBER_ROLE | M_VER | +--------------+--------------+--------+------+---------+-------------+-------+ | gr_applier | ...-8d90-... | mysql1 | 3306 | ONLINE | SECONDARY | 8.0.2 | | gr_applier | ...-be23-... | mysql2 | 3306 | ONLINE | SECONDARY | 8.0.2 | | gr_applier | ...-a747-... | mysql3 | 3306 | ONLINE | PRIMARY | 8.0.2 | +--------------+--------------+--------+------+---------+-------------+-------+ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 65 / 84
Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 66 / 84
MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 67 / 84
MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. MySQL Router doesn´t require any specific configuration. It configures itself automatically (bootstrap) using MySQL InnoDB Cluster´s metadata. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 68 / 84
MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. MySQL Router doesn´t require any specific configuration. It configures itself automatically (bootstrap) using MySQL InnoDB Cluster´s metadata. The MySQL Router development will be focusing on sharding. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 69 / 84
ProxySQL has native support for Group Replication which makes it a good choice for advanced users. ProxySQL If you need some specific features that are not yet available in MySQL Router, like transparent R/Wsplitting, then you can use your software of choice. We are also collaborating with ProxySQL. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 70 / 84
Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 71 / 84
MySQL Shell (GA!) The MySQL Shell is an interactive Javascript, Python, or SQL interface supporting development and administration for the MySQL Server and is a component of the MySQL Server. You can use the MySQL Shell to performdata queries and updates as well as various administration operations. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 72 / 84
MySQL Shell (2) The MySQL Shell provides: Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 73 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 74 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 75 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 76 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 77 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats MySQL Standard and X Protocols Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 78 / 84
MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats MySQL Standard and X Protocols and more... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 79 / 84
MySQL Shell (3) PREVIEW: the newShell´s prompt is nice and clear ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 80 / 84
don´t forget, this is a HA solution ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 81 / 84
Deploying a MySQL InnoDB Cluster using MySQL Shell´s adminAPI: mysql-js> var i1 = 'root@instance01:3306'; mysql-js> var i2 = 'root@instance02:3306'; mysql-js> var i3 = 'root@instance03:3306'; mysql-js> dba.checkInstanceCon guration(i1); mysql-js> dba.checkInstanceCon guration(i2); mysql-js> dba.checkInstanceCon guration(i3); mysql-js> shell.connect(i1); mysql-js> var cluster = dba.createCluster('ChinaCluster'); mysql-js> cluster.checkInstanceState(i2); mysql-js> cluster.addInstance(i2); mysql-js> cluster.checkInstanceState(i3); mysql-js> cluster.addInstance(i3); Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 82 / 84
See this in action and do it yourself during the next session ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 83 / 84
Thank you ! Any Questions ? more at http://lefred.be/content/category/mysql/group-replication/ http://mysqlhighavailability.com/ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 84 / 84

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Introduction to MySQL InnoDB Cluster

  • 3. MySQL InnoDB Cluster MySQL High Availability made easy August 2017   Frédéric Descamps - MySQL Community Manager - Oracle 3 / 84
  • 4.   Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purpose only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied up in making purchasing decisions. The development, release and timing of any features or functionality described for Oracle´s product remains at the sole discretion of Oracle. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 4 / 84
  • 5. about.me/lefred Who am I ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 5 / 84
  • 6. Frédéric Descamps @lefred MySQL Evangelist Hacking MySQL since 3.23 devops believer MySQL Community Manager since May 2016 living in Belgium 🇧🇪 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 6 / 84
  • 7. 100%   virtually all organizations require their most critical systems to be highly available ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 7 / 84
  • 8.     "HighAvailabilitybecomesacorefirst classfeatureofMySQL!" MySQL InnoDB Cluster   Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 8 / 84
  • 9. MySQL InnoDB Cluster: vision   "Asingleproduct-MySQL-withhighavailabilityandscalingfeaturesbakedin;providing anintegratedend-to-endsolutionthatiseasytouse." Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 9 / 84
  • 10. MySQL InnoDB Cluster: vision   "Asingleproduct-MySQL-withhighavailabilityandscalingfeaturesbakedin;providing anintegratedend-to-endsolutionthatiseasytouse." InnoDB cluster Ease-of-Use Extreme Scale-Out Out-of-Box Solution Built-in HA High Performance Everything Integrated Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 10 / 84
  • 11. One Product: MySQL All components created together Tested together Packaged together Easy to Use One client: MySQL Shell Easy packaging Integrated orchestration Homogenous servers Flexible and Moden SQL and NoSQL together Protocol Buffers Asynchronous API Developer friendly Support Read/Write Scale Out Shared clusters Federated systemof N replica sets supporting cross shard operations Each replica set manages a shard MySQL InnoDB Cluster: goals Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 11 / 84
  • 12. Our vision in 4 steps MySQLDocumentStore Relational&DocumentModels MySQLHA Out-Of-BoxHA ReadScale-Out AsyncReplication+AutoFailover WriteScale-Out Sharding E1 E3 E2 E4 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 12 / 84
  • 13. Step 2´s Architecture Application MySQL Connector MySQL Router MySQL Shell InnoDB cluster Application MySQL Connector MySQL Router Mp M M Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 13 / 84
  • 14. Step 3´s Architecture Application MySQL Connector MySQL Router MySQL Shell InnoDB cluster Application MySQL Connector MySQL Router Mp M M S1 S2 S3 S4 S... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 14 / 84
  • 15. Step 4´s Architecture Application MySQL Connector MySQL Router MySQL Shell Application MySQL Connector MySQL Router InnoDB cluster Mp M M S2 S3 S4 S...S1 InnoDB cluster Mp M M S1 S2 S3 S4 S... InnoDB cluster Mp M M S1 S2 S3 S4 S... Application MySQL Connector MySQL Router Application MySQL Connector MySQL Router Application MySQL Connector MySQL Router replicaset1 replicaset2 replicaset3 Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 15 / 84
  • 16. Group Replication: heart of MySQL InnoDB Cluster Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 16 / 84
  • 17. Group Replication: heart of MySQL InnoDB Cluster Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 17 / 84
  • 18. MySQL Group Replication but what is it ?!? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 18 / 84
  • 19. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 19 / 84
  • 20. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 20 / 84
  • 21. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 21 / 84
  • 22. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 22 / 84
  • 23. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 23 / 84
  • 24. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution GR allows automatic distributed recovery Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 24 / 84
  • 25. MySQL Group Replication but what is it ?!? GR is a plugin for MySQL, made by MySQL and packaged with MySQL GR is an implementation of Replicated Database State Machine theory GR uses a Paxos based protocol GR allows to write on all Group Members (cluster nodes) simultaneously while retaining consistency GR implements conflict detection and resolution GR allows automatic distributed recovery Supported on all MySQL platforms !! Linux, Windows, Solaris, OSX, FreeBSD Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 25 / 84
  • 26. And for users ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 26 / 84
  • 27. And for users ? no longer necessary to handle server fail-over manually or with a complicated script Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 27 / 84
  • 28. And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 28 / 84
  • 29. And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 29 / 84
  • 30. And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups GR handles crashes, failures, re-connetcs automatically Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 30 / 84
  • 31. And for users ? no longer necessary to handle server fail-over manually or with a complicated script GR provides fault tolerance GR enables update-everywhere setups GR handles crashes, failures, re-connetcs automatically Allows an easy setup of a MySQL service high available ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 31 / 84
  • 32. OK, but how does it work ? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 32 / 84
  • 33. OK, but how does it work ? it´s just ... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 33 / 84
  • 34. OK, but how does it work ? it´s just ... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 34 / 84
  • 35. OK, but how does it work ? it´s just ... ... no, in fact the writesets replication is synchronous and then certification and apply of the changes are local to each nodes and asynchronous. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 35 / 84
  • 36. OK, but how does it work ? it´s just ... ... no, in fact the writesets replication is synchronous and then certification and apply of the changes are local to each nodes and asynchronous. not that easy to understand... right ? As a picture is worth a 1000 words, let´s illustrate this... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 36 / 84
  • 37. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 37 / 84
  • 38. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 38 / 84
  • 39. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 39 / 84
  • 40. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 40 / 84
  • 41. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 41 / 84
  • 42. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 42 / 84
  • 43. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 43 / 84
  • 44. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 44 / 84
  • 45. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 45 / 84
  • 46. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 46 / 84
  • 47. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 47 / 84
  • 48. MySQL Group Replication Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 48 / 84
  • 49. Certification Certification is the process that only needs to answer the following unique question: Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 49 / 84
  • 50. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 50 / 84
  • 51. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 51 / 84
  • 52. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 52 / 84
  • 53. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 53 / 84
  • 54. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 54 / 84
  • 55. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 55 / 84
  • 56. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 56 / 84
  • 57. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 57 / 84
  • 58. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction serialized by the total order in GCS/XCOM+ GTID Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 58 / 84
  • 59. Certification Certification is the process that only needs to answer the following unique question: canthewrite(transaction)beapplied? based on unapplied earlier transactions such conflicts must come for other members/nodes happens on every member/node should be deterministic on every node results are not reported to the group pass: enter in the apply queue fail: drop the transaction serialized by the total order in GCS/XCOM+ GTID cost is based on trx size (# rows &# keys) Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 59 / 84
  • 60. Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 60 / 84
  • 61. Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. mysql> show global variables like 'group_replication_single_primary_mode'; +---------------------------------------+-------+ | Variable_name | Value | +---------------------------------------+-------+ | group_replication_single_primary_mode | ON | +---------------------------------------+-------+ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 61 / 84
  • 62. Default = Single Primary Mode By default, MySQL InnoDB Cluster runs in Single Primary Mode. mysql> show global variables like 'group_replication_single_primary_mode'; +---------------------------------------+-------+ | Variable_name | Value | +---------------------------------------+-------+ | group_replication_single_primary_mode | ON | +---------------------------------------+-------+ In Single Primary Mode, a single member acts as the writable master (PRIMARY) and the rest of the members act as hot-standbys (SECONDARY). The group itself coordinates and configures itself automatically to determine which member will act as the PRIMARY, through a leader election mechanism. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 62 / 84
  • 63. Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 63 / 84
  • 64. Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). more visibility Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 64 / 84
  • 65. Single Primary Mode - new in 8.0.2 group_replication_member_weight: influence the primary member election in Single- Primary mode (from0to100). more visibility mysql-sql> select * from performance_schema.replication_group_members; +--------------+--------------+--------+------+---------+-------------+-------+ | CHANNEL_NAME | MEMBER_ID | M_HOST | PORT | M_STATE | MEMBER_ROLE | M_VER | +--------------+--------------+--------+------+---------+-------------+-------+ | gr_applier | ...-8d90-... | mysql1 | 3306 | ONLINE | SECONDARY | 8.0.2 | | gr_applier | ...-be23-... | mysql2 | 3306 | ONLINE | SECONDARY | 8.0.2 | | gr_applier | ...-a747-... | mysql3 | 3306 | ONLINE | PRIMARY | 8.0.2 | +--------------+--------------+--------+------+---------+-------------+-------+ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 65 / 84
  • 66. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 66 / 84
  • 67. MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 67 / 84
  • 68. MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. MySQL Router doesn´t require any specific configuration. It configures itself automatically (bootstrap) using MySQL InnoDB Cluster´s metadata. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 68 / 84
  • 69. MySQL Router (GA!) MySQL Router is lightweight middleware that provides transparent routing between your application and backend MySQL Servers. It can be used for a wide variety of use cases, such as providing high availability and scalability by effectively routing database traffic to appropriate backend MySQL Servers. MySQL Router doesn´t require any specific configuration. It configures itself automatically (bootstrap) using MySQL InnoDB Cluster´s metadata. The MySQL Router development will be focusing on sharding. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 69 / 84
  • 70. ProxySQL has native support for Group Replication which makes it a good choice for advanced users. ProxySQL If you need some specific features that are not yet available in MySQL Router, like transparent R/Wsplitting, then you can use your software of choice. We are also collaborating with ProxySQL. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 70 / 84
  • 71. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 71 / 84
  • 72. MySQL Shell (GA!) The MySQL Shell is an interactive Javascript, Python, or SQL interface supporting development and administration for the MySQL Server and is a component of the MySQL Server. You can use the MySQL Shell to performdata queries and updates as well as various administration operations. Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 72 / 84
  • 73. MySQL Shell (2) The MySQL Shell provides: Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 73 / 84
  • 74. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 74 / 84
  • 75. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 75 / 84
  • 76. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 76 / 84
  • 77. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 77 / 84
  • 78. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats MySQL Standard and X Protocols Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 78 / 84
  • 79. MySQL Shell (2) The MySQL Shell provides: Both Interactive and Batch operations Document and Relational Models CRUD Document and Relational APIs via scripting Traditional Table, JSON, Tab Separated output results formats MySQL Standard and X Protocols and more... Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 79 / 84
  • 80. MySQL Shell (3) PREVIEW: the newShell´s prompt is nice and clear ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 80 / 84
  • 81. don´t forget, this is a HA solution ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 81 / 84
  • 82. Deploying a MySQL InnoDB Cluster using MySQL Shell´s adminAPI: mysql-js> var i1 = 'root@instance01:3306'; mysql-js> var i2 = 'root@instance02:3306'; mysql-js> var i3 = 'root@instance03:3306'; mysql-js> dba.checkInstanceCon guration(i1); mysql-js> dba.checkInstanceCon guration(i2); mysql-js> dba.checkInstanceCon guration(i3); mysql-js> shell.connect(i1); mysql-js> var cluster = dba.createCluster('ChinaCluster'); mysql-js> cluster.checkInstanceState(i2); mysql-js> cluster.addInstance(i2); mysql-js> cluster.checkInstanceState(i3); mysql-js> cluster.addInstance(i3); Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 82 / 84
  • 83. See this in action and do it yourself during the next session ! Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 83 / 84
  • 84. Thank you ! Any Questions ? more at http://lefred.be/content/category/mysql/group-replication/ http://mysqlhighavailability.com/ Copyright @ 2017 Oracle and/or its affiliates. All rights reserved. 84 / 84