The document discusses MariaDB 5.5 and the future of MariaDB, noting that MariaDB aims to be a drop-in replacement for MySQL that is fully compatible but with additional features; it provides an overview of MariaDB's history and major releases from 5.1 to 5.5; and it outlines some of MariaDB's goals and plans for the future, including the 10.0 release and incorporating additional storage engines.

1. MariaDB 5.5 and what
comes next
Colin Charles, Monty Program Ab
colin@montyprogram.com | colin@mariadb.org
http:/ /montyprogram.com/ | http:/ /mariadb.org/
http:/ /bytebot.net/blog/ | @bytebot on Twitter
DB Tech Showcase, K.K.Ashisuto, Tokyo, Japan
18 October 2012

2. whoami
MariaDB guy at Monty Program Ab
Formerly MySQL AB/Sun Microsystems
Past lives included Fedora Project (FESCO),
OpenOffice.org

3. Aims
32 months, four major releases
(5.1,5.2,5.3,5.5) & more (Galera Cluster, 10.0)
Discuss the broader MySQL ecosystem
The future of MariaDB

4. MariaDB is... (currently)
Community developed
Feature enhanced
a better MySQL
Fully compatible with MySQL
not a fork
feature complete

5. Ownership
MySQL (database) owned by MySQL AB
(company) -> Sun -> Oracle
Monty Program is just a (major) sponsor of
MariaDB
maria-captains: 50% MP, 50% community
including Sphinxsearch, Twitter, SkySQL,
Taobao, Facebook, Percona, Codership, & more

6. Aims of MariaDB
100% compatible, drop-in replacement to
MySQL
i.e. no changes in connectors, app doesn’t
care its MariaDB unless using new features,
easy upgrade (uninstall mysql, install
mariadb, magic!)
Stable (bug-free) releases with no regressions
GPLv2

7. Compatibility with
MySQL
NDB cluster included, XtraDB enabled by
but not enabled by default now. InnoDB
default included too & may
change to default
Client libraries, client
server protocol, SQL MariaDB Galera Cluster
dialect, master-slave is a separate download
replication all same
http://kb.askmonty.org/
Data files supported as v/mariadb-versus-
long as same versions mysql-compatibility

8. XtraDB
ENGINE=InnoDB uses
XtraDB by default
Less checkpointing
(smoother), less
flushing to disk,
stable performance

9. MariaDB 5.5
GA April 2012
https://kb.askmonty.org/en/what-is-
mariadb-55/
Current release: MariaDB 5.5.27
By far the most popular release of MariaDB
downloaded, in use, today

10. MariaDB 5.5: an
opensource threadpool
Modified from 5.1 No minimization of
(libevent based), great concurrent transactions
for CPU bound loads with dynamic pool size
and short running
queries
Windows (threadpool),
Linux (epoll), Solaris
(event ports), FreeBSD/
OSX (kevents)

11. MariaDB 5.5: Better for
DBAs
non-blocking client library fast node.js driver
available: mariasql
start operation, do
work in thread, SELECT now has LIMIT
operation processed, ROWS EXAMINED to
result travels back consume less resources
use cases: multiple SELECT * from t1,
queries against single t2 LIMIT 10 ROWS
server (utilize more EXAMINED 1000;
CPUs); queries against
multiple servers
(SHOW STATUS on
many machines)

12. That’s it?
From December 2010 to April 2012, 3 features
for a 16 month delay?!?

13. MariaDB 5.3
Biggest change in the optimizer since it was
written - more complete than MySQL 5.6!!!
Replication improvements
Released February 2012
Based on the MySQL 5.1 codebase

14. Better replication
Original statements logged with row based
replication (RBR) events
Checksum for binlog events
RBR works for tables with no primary key
Consistent snapshot between storage engines

15. Group commit in the
binary log
sync_binlog=1, http://kb.askmonty.org/en/group-
innodb_flush_log_at_trx_commit=1 commit-for-the-binary-log
https://www.facebook.com/note.php?
note_id=10150261692455933

16. MariaDB 5.3: GIS
support!
MySQL has OpenGIS SFS (Simple feature
access, SQL access method)
Now, SQL with full geometry types
ST_ prefix
http://kb.askmonty.org/en/gis-features-
in-533

17. Optimizer enhancements
Join additions
block nested loop joins for outer-joins, block hash joins,
Batched Key Access (BKA)
Optimization for derived tables & views
mergeable derived tables processed like VIEWs +
optimizer creates indexes over materialized derived
tables
Disk access optimization
Index Condition Pushdown (ICP), Multi-Range Read (MRR)

18. Subquery optimizations
Semi-join Goodbye rewriting as
optimization, JOINs or separate
materialization for queries
non-correlated IN
queries, subquery
cache
DBT-3, 60M rows, 29GB XtraDB

19. Welcome MySQL 5.6
Instant EXPLAIN
https://
kb.askmonty.org/
en/optimizer-
feature-
comparison-
matrix/
JSON EXPLAIN &
Optimizer
tracing...

20. Progress reporting
For ALTER TABLE or LOAD DATA INFILE
MariaDB [mail]> alter table mail engine = maria;
Stage: 1 of 2 'copy to tmp table' 17.55% of stage done
MariaDB [mail]> select id, user, db, command, state,
-> time_ms, progress from information_schema.processlist;
+---------+-------------------+-----------+----------+
| command | state | time_ms | progress |
+---------+-------------------+-----------+----------+
| Query | copy to tmp table | 23407.131 | 17.551 |
+---------+-------------------+-----------+----------+
1 row in set (0.47 sec)

21. NoSQL access methods
Comes with HandlerSocket
direct access to XtraDB/InnoDB for CRUD
operations
Dynamic columns
create columns with dynamic content
basically a blob with handling functions

22. MariaDB 5.2
Released November 2011
Pluggable authentication w/PAM plugin
User statistics: CLIENT_STATISTICS,
USER_STATISTICS, INDEX_STATISTICS,
TABLE_STATISTICS (userstats=1)
Virtual columns - PERSISTENT or VIRTUAL

23. Still using MyISAM?
Mitigates thread contention for key cache
lock, with notable performance improvements
Key caches divided into different segments,
allowing for better key cache concurrency
1-64 segments

24. SphinxSE
CREATE TABLE t1 (..) instead of WHERE,
ENGINE=SPHINX ORDER BY, LIMIT
CONNECTION=”sphinx:/
/localhost:9312/test”; Sphinx is optimized/
fast for these tasks
Engine connects to
Sphinx searchd Most of the Sphinx
API is exposed to
Let indexing, searching, engine
sorting, filtering be
performed by Sphinx JOIN search table with
other MySQL tables

25. MariaDB 5.1
Arrived February 2010
Storage engines: XtraDB, FederatedX, PBXT*,
OQGRAPH*, Aria, etc.
microslow patch, processlist w/microsecond
precision
table elimination

26. What is Aria?
Still just a crash-safe MyISAM
used for temporary tables internally
group commit added in 5.2 to speed up
multi-user inserts

27. How do we support all
this?
Support Latest
Version Released MySQL
till release
5.1.42 Feb 2010 Feb 2015 5.1.62 5.1.63
5.2.3 Nov 2010 Nov 2015 5.2.12 5.1.63
5.3.5 Feb 2012 Feb 2017 5.3.8 5.1.65
5.5.23 Apr 2012 Apr 2017 5.5.27 5.5.27

28. Oh, and we’re fast
Oracle loves MySQL performance on
Microsoft Windows. So do we
OLTP read-only OLTP write-only

29. How open is MariaDB?
Mailing lists: Launchpad http://
launchpad.net/
maria- maria/
developers@lists.lau
nchpad.net Bugs database/feature
worklog: Jira
maria-
discuss@lists.launchp http://
ad.net mariadb.atlassian.ne
t/
Code hosting:
Launchpad #maria on freenode

30. Knowledgebase

31. Deployments!
happy users: pap.fr, wabtec, Paybox Services,
“We made the switch on
OLX, Jelastic, Web of Trust, SaltOS, ERP5, etc. Saturday -- and we’re seeing
“MariaDB had these same bugs that we ran into benefits already -- our daily
with MySQL. However the big difference was optimization time is down from
that when we reported these bugs, they were 24 minutes to just 4 minutes” --
quickly resolved within 48 hours!” -- Dreas van Ali Watters, CEO, travelblog.org
Donselaar, Chief Technology Officer, SpamExperts
B.V. after migrating over 300 servers from
MySQL 5.0 to MariaDB 5.1.
“Migrating from MySQL 5.1 to MariaDB 5.2 was
as simple as removing MySQL RPMs and installing
the MariaDB packages, then running
mysql_upgrade.” - Panayot Belchev, proprietor,
Host Bulgaria on providing
MariaDB to over 7,000 of their web hosting
customers.

32. Getting MariaDB
http://mariadb.org/ has repositories
(APT,YUM) & regular downloads
OpenSUSE build service
Gentoo, FreeBSD, Homebrew, Mageia, many
distributions
http://kb.askmonty.org/v/distributions-which-
include-mariadb

33. We have a book

34. Other branches
MySQL Percona MariaDB MySQL Percona MariaDB
5.5.20 7.7M 61M 5.5.20 222299 1587843
5.5.22 16M 60M 5.5.22 438567 1540932

35. What are we missing
from Percona Server?
percona_innodb_buffer_pool_shm - requires
big shmax not default on many systems
percona_log_slow_query_log-
log_slow_verbosity - InnoDB filtering
information not fully in MariaDB
Disabled test suite is awesome resource :)

36. Faster even?
read only? InnoDB/XtraDB is fine
InnoDB has higher throughput, but stalls & checkpoints w/
high write load

37. Track record
We found the latest MySQL security bug and MariaDB was first to
be patched (sql/password.c & memcmp())
We don’t like regressions
http://www.skysql.com/blogs/hartmut/nasty-innodb-regression-
mysql-5525
http://www.skysql.com/blogs/kolbe/heads-no-more-query-cache-
partitioned-tables-mysql-5523
We care about backward compatibility & introduce features
carefully
XtraDB innodb_adaptive_checkpoint=none|reflex|estimate|
keep_average (no more reflex...)

38. We care about quality
Automated test suite run upon every push
Better QA & code coverage
MySQL test cases: 1,765
Percona Server test cases: 1,837
MariaDB test cases: 2,180

39. User stats plugin
Disabled by default, consider enabling it to
show use! http://mariadb.org/feedback_plugin/
data from over 85
countries!

40. We love the community
Tokutek’s TokuDB ships with MariaDB too
groonga is to be merged
We’re looking at spider next
Multiple software packages talk about us (as
an alternative to MySQL): Drupal, MediaWiki,
Plone, phpMyAdmin, WordPress, etc.

41. Future
MySQL 5.6 just RC, we have most features in 5.5
MariaDB 10.0
new InnoDB inside MariaDB (done)
Global transaction ID support
Multi-source replication (done)
Enhanced semisync replication
Persistent InnoDB statistics (done)
Cassandra Storage Engine (done), HBase Storage Engine
virtual machine for Cassandra made by community!

42. MariaDB Galera Cluster
http://kb.askmonty.org/en/galera/
Now in
Scale your read & write
ALPHA!
workloads, automatically, without
the need for NDB Cluster!

43. Support
mariadb.org/service-providers/
SkySQL partners with K.K.Ashisuto for best
local support!
Monty Program does developer support &
NRE
http://montyprogram.com/developer-
support/

44. We’re incredibly social
facebook: fb.com/MariaDB.dbms
twitter: @mariadb
google plus: gplus.to/mariadb
we also have a LinkedIn group

45. Q&A
colin@montyprogram.com | colin@mariadb.org
http:/ /montyprogram.com/ | http:/ /mariadb.org/
twitter: @bytebot | url: http://bytebot.net/blog/