the mysql ecosystem-understanding it not running away from it

1 .The MySQL Ecosystem - understanding it, not running away from it! Colin Charles, Chief Evangelist, Percona Inc. colin.charles@percona.com / byte@bytebot.net http://bytebot.net/blog/ | @bytebot on Twitter FOSDEM, Brussels, Belgium 4 February 2018 

2 . whoami • Chief Evangelist, Percona Inc • Focusing on the MySQL ecosystem (MySQL, Percona Server, MariaDB Server), as well as the MongoDB ecosystem (Percona Server for MongoDB) + 100% open source tools from Percona like Percona Monitoring & Management, Percona xtrabackup, Percona Toolkit, etc. • Founding team of MariaDB Server (2009-2016), previously at Monty Program Ab, merged with SkySQL Ab, now MariaDB Corporation • Formerly MySQL AB (exit: Sun Microsystems) • Past lives include The Fedora Project (FESCO), OpenOffice.org • MySQL Community Contributor of the Year Award winner 2014 #mysqldevroom #FOSDEM 

3 . A Mature Ecosystem • MySQL: nearly 23 years old — May 1995 • Percona Server: 9+ years old — November 2008 • MariaDB: 8 years old — February 2010 • Drizzle: 2008 - 2012 (R.I.P.) • WebScaleSQL: March 2014 - December 2016 #mysqldevroom #FOSDEM 

4 . Learnings from WebScaleSQL #mysqldevroom #FOSDEM 

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8 . Open source community • MariaDB: takes external contributors/committers, participates in Google Summer of Code • MySQL: 5.7 takes Generated Columns (virtual columns in MariaDB 5.2) from Andrey Zhakov • contributions welcome, commits not • see: MySQL Community Contributor Award Program • Percona: bug reports welcome, commits not • Contributor agreements: Oracle Contributor Agreement (OCA), MariaDB Contributor Agreement (MCA) and the BSD New #mysqldevroom #FOSDEM 

9 . Is MySQL dying? • “The reports of my death have been greatly exaggerated” — Mark Twain • MySQL ecosystem development is at its most vibrant now than it has ever been • Oracle has been a great steward of pushing MySQL development forward #mysqldevroom #FOSDEM 

10 . MySQL 5.7 - www.thecompletelistoffeatures.com • Multi-source replication • GTID no longer requires log-slave- • Dynamic replication filters updates to be enabled • Lossless semisync • Virtual columns (generated columns) • SHOW EXPLAIN for connection_id • Online buffer pool resize • GIS functionality • Username size increase • Statement timeouts • LOCK/UNLOCK accounts • Change master without stopping SQL thread • JSON + MySQL Shell + X DevAPI • Online GTID implementation • Encryption at rest #mysqldevroom #FOSDEM 

11 . MariaDB 10.1 • START TRANSACTION WITH • ANALYZE <statement> CONSISTENT SNAPSHOT • Threadpool • Integrated Galera Cluster • cracklib_password_check • Table/tablespace encryption • SQL error logging plugin • Optimistic parallel replication • Extended REGEXP (PCRE) • Enhanced semi-sync • Roles replication • InnoDB defragmentation #mysqldevroom #FOSDEM 

12 . MariaDB 10.2 • InnoDB as default InnoDB • Multiple triggers for the same • MyRocks alpha event • Window functions • EXECUTE IMMEDIATE (Oracle styled) • Recursive Common Table Expressions (CTEs) • DML only flashback • AWS Key Management plugin • CHECK CONSTRAINT • SHOW CREATE USER #mysqldevroom #FOSDEM 

13 . Percona Server 5.6/5.7 • Percona XtraDB (many • Utility user - system access to improvements, parallel doublewrite admin tasks, limited access to user buffer, etc.) schema • variable: numa_interleave • Slow query log enhancements • restrict # of binlog files - • Log all client commands to syslog max_binlog_files • Improved Memory storage engine • Lock-free SHOW SLAVE STATUS • Per-query variable statement NOLOCK • PROXY protocol support • Percona Toolkit UDFs • Backup locks • Expanded fast index creation - expand_fast_index_creation • TokuBackup #mysqldevroom #FOSDEM 

14 . A base blog post resource • High level, answer to a whitepaper • https://www.percona.com/blog/2017/11/02/mysql-vs-mariadb- reality-check/ #mysqldevroom #FOSDEM 

15 . Define: compatibility (OED) • A state in which two things are able to exist or occur together without problems or conflict. #mysqldevroom #FOSDEM 

16 . Why this matters • MariaDB Server is the “default” MySQL in pretty much every Linux distribution except Ubuntu (shipping MySQL 5.7) • Take a page from the cloud operators & their offerings • Amazon Web Services (AWS) RDS MySQL & MariaDB, Microsoft Azure MySQL & MariaDB, Rackspace Cloud MySQL & MariaDB (and Percona Server) #mysqldevroom #FOSDEM 

17 . Commitments • Verbal commitments: “MySQL 5.6, should be comparable to MariaDB Server 10.1. And for 10.2 it should be compatible with MySQL 5.7” — Michael “Monty” Widenius, CTO of MariaDB Corporation and MariaDB Foundation, 7 October 2016, MariaDB Developer’s Meeting, Amsterdam • http://mariadb.org/about/ • “It is an enhanced, drop-in replacement for MySQL.” #mysqldevroom #FOSDEM 

18 . Governance • MariaDB • MariaDB Corporation • MariaDB Foundation • https://mariadb.org/about/ governance/ • MySQL • Oracle (by way of Sun, MySQL AB) • Percona • Percona Inc #mysqldevroom #FOSDEM 

19 . Releases MariaDB MySQL 5.1: 1 Feb 2010 5.1: 14 Nov 2008 5.2: 10 Nov 2010 5.3: 29 Feb 2012 5.5: 11 Apr 2012 5.5: 3 Dec 2010 5.6: 5 Feb 2013 10.0: 31 Mar 2014 10.1: 17 Oct 2015 5.7: 21 Oct 2015 10.2: 23 May 2017 #mysqldevroom #FOSDEM 

20 . Replication #mysqldevroom #FOSDEM 

21 . Replication • Default binlog format is now MIXED in MariaDB (ROW in MySQL) • Default replicate_annotate_row_events is ON • Time delayed replication arrives in MariaDB Server 10.2 (in MySQL 5.6) • DML only Flashback - rollback instances/databases/tables to an older snapshot (via Alibaba!) - unique to MariaDB • Synchronous replication • Galera Cluster: MariaDB Server has it built-in, Percona XtraDB Cluster 5.7 comes with ProxySQL + an admin tool • Group replication: works only on MySQL, Percona Server #mysqldevroom #FOSDEM 

22 . X Protocol • MariaDB Server has no support for the MySQL X Protocol • This means you cannot use mysqlsh to access MariaDB Server either #mysqldevroom #FOSDEM 

23 . Encryption • MySQL 5.7 and MariaDB Server 10.1+ implement encryption differently (one is fully tablespace encryption, the other is based on the Google patch for tablespace encryption in addition to having table encryption) • One does not encrypt logs, the other does • MySQL requires innodb_file_per_table • MySQL implementation works fully with Percona XtraDB Cluster #mysqldevroom #FOSDEM 

24 . Security • MySQL: sha256_password • MariaDB: ed25519 password plugin • validate_password is on by default in MySQL 5.7 (not in MariaDB) • SSL: 5.7 has pre-generated keys, enable it in the client; disabled by default in MariaDB Server • MySQL links against YaSSL, Percona Server against OpenSSL (changing in 8.0 for MySQL too) #mysqldevroom #FOSDEM 

25 . mysql.user table changes • MariaDB Server and MySQL differ here (not just by addition of roles) - mysql.user.password is just mysql.user.authentication_string • Password expiry is coming? https://jira.mariadb.org/browse/ MDEV-7597 • Password last changed? Lifetime? • ACCOUNT LOCK/UNLOCK • VALIDATE_PASSWORD_STRENGTH() SQL function doesn’t work in MariaDB Server #mysqldevroom #FOSDEM 

26 . Stuff that might matter to you • Optimizer hints - https://jira.mariadb.org/browse/MDEV-9078 • RENAME INDEX - https://jira.mariadb.org/browse/MDEV-7318 • Query rewriting? - https://jira.mariadb.org/browse/MDEV-5561 • MySQL SUPER READONLY - https://jira.mariadb.org/browse/ MDEV-9458 • Optimiser trace: https://jira.mariadb.org/browse/MDEV-6111 • PERFORMANCE_SCHEMA - 5.7 improvements, MariaDB still ships 5.6 P_S #mysqldevroom #FOSDEM 

27 . Tools • including new tools like mysql_ssl_rsa_setup ? mysqlpump? • tools that require MySQL GTID don’t work with MariaDB Server (e.g. mysqlfailover, mysqlrpladmin, MHA for GTID based failover, MySQL Router, etc.) #mysqldevroom #FOSDEM 

28 . Ecosystem • Percona Toolkit • MySQL Utilities • Percona XtraBackup • MySQL Router • ProxySQL • PRM (w/Pacemaker) • MariaDB MaxScale • SeveralNines ClusterControl • mydumper • Orchestrator • MHA • MySQL Sandbox • Tungsten Replicator • MariaDB ColumnStore • vitess • Numerous GUI tools: MySQL • Tumblr JetPants Workbench, phpMyAdmin, SQLYog, etc #mysqldevroom #FOSDEM 

29 . Today, when to use MariaDB Server? • MyRocks storage engine • GSSAPI authentication • TokuDB storage engine (Kerberos, Active Directory) • MyISAM user? Segmented key • Window functions caches will help • PCRE Regular Expressions • CONNECT storage engine • Optimistic parallel replication • Threadpool • ANALYZE <statement> • PAM authentication • cracklib_password_check • SQL Roles #mysqldevroom #FOSDEM