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MariaDB 10.0 & What’s
New with The Project
Michael “Monty” Widenius
Colin Charles
Who are we
• Michael “Monty” Widenius
– Creator of MySQL
– Project leader at MariaDB, founder of Monty Program
Ab
– CTO, MariaDB Foundation
– monty@mariadb.org | twitter: @montywi
• Colin Charles
– Chief Evangelist, MariaDB @ Monty Program Ab (soon
SkySQL)
– Formerly of MySQL
– colin@mariadb.org | twitter: @bytebot
2
Agenda
• MariaDB 10.0 series
introduction
• Where we stand towards
MySQL 5.6
• Features, including
MariaDB Galera Cluster
3
What’s MariaDB?
• 38 months: major releases (5.1, 5.2, 5.3,
5.5, Galera Cluster) and 10.0 series
• Still community developed, feature
enhanced & backward compatible
• maria-captains: 50% MP, 50% community
including Sphinxsearch, SkySQL, Taobao,
Percona, Codership, Facebook, & more...
• GPLv2 server
4
Goal hasn’t changed
• uninstall mysql-server
• install mariadb-server
• it should “just work!” (& be compatible)
• (or more recently, you just apt-get/yum
install mariadb, and it removes mysql)
• MySQL compatible:
– data on disk & on the wire is same
– same file names, sockets, port
5
Why MariaDB 10.0?
• The 5.5 merge took about a year (!)
• In MariaDB 5.5, we have over 1.5
million lines of extra code ~61MB diff
• MySQL 5.6 refactored with huge losses
in commit history
• We’re not a patch set against MySQL
– MariaDB clearly does not depend on MySQL
for future development
6
MariaDB 10.0: In a nutshell...
• Built on MariaDB 5.5
• Backported features from MySQL 5.6
• Multiple new features
7
First, let’s start with some history
• MariaDB 5.1 (MySQL-5.1 base)
– Table elimination, new storage engines, cleanup, better
tests, pool of threads
• MariaDB 5.2 (MariaDB-5.1 base)
– Virtual columns, extended user statistics, segmented
MyISAM keycache
• MariaDB 5.3 (MariaDB-5.2 base)
– Biggest changes to optimizer (faster subqueries, joins, etc.)
– Microsecond precision, faster HANDLER (HANDLER RED 50%
faster w/530,000 qps), dynamic columns
– Better replication (group commit, etc.)
– HandlerSocket
8
MariaDB 5.5 (MariaDB 5.3 + MySQL
5.5)
• Opensource, more efficient threadpool
• Non-blocking client library
• New LIMIT ROWS EXAMINED option
• Extended keys for XtraDB/InnoDB
• New SphinxSE
• Lots of security fixes, new status
variables, etc.
9
MariaDB 10.0
10
Date Version Status
12 Nov
2012
10.0.0 Alpha
6 Feb
2013
10.0.1 Alpha
24 Apr
2013
10.0.2 Alpha
10.0.3 Beta
Backported features
• InnoDB including TRANSACTION READ ONLY
• PERFORMANCE_SCHEMA
• Online ALTER TABLE (in-progress)
• Optimizer
– ORDER BY...LIMIT optimization (shows only few rows of a result set)
• Re-implemented:
– Error messages (w/system error string)
– CURRENT_TIMESTAMP as DEFAULT for DATETIME columns
– Global Transaction ID (10.0.2 - MDEV-26)
– Parallel replication
• New (optimizer)
– EXISTS-TO-IN optimization
11
Only in MariaDB 10.0: Multi-source
replication
• Work from Taobao
• Many users partition data across many
masters... now you can replicate many
masters to a single slave
• Great for analytical queries, complete
backups, etc.
12
Only in MariaDB 10.0:
• SHOW EXPLAIN for <thread_id> gets
the query plan for a running statement
• Faster ALTER TABLE with unique keys
for Aria & MyISAM
• Per-thread memory usage (Taobao)
– INFORMATION_SCHEMA.PROCESSLIST has
MEMORY_USAGE & EXAMINED_ROWS now
– SHOW STATUS has memory usage too
13
Only in MariaDB 10.0: CassandraSE,
LevelDB support
• MariaDB as a “data platform”
• Integration with NoSQL/Big Data DB,
Apache Cassandra cluster, seen as a
storage engine to MariaDB
• Combine (join) data between Cassandra &
MariaDB & Oracle (via CONNECT)
• Write to Cassandra from SQL (SELECT,
INSERT, UPDATE, DELETE)
• LevelDB (in-progress)
14
Only in MariaDB 10.0: Engine
independent persistent statistics
• InnoDB has persistent statistics in MySQL
5.6; we have an engine-independent
version
• These statistics aren’t limited by the SE
API, and are used by query optimizer to
choose best execution plan for each
statement
• Statistics collected for non-indexed
columns too (unlike InnoDB’s)
15
Dynamic columns
• Store a different set of columns for
every row in the table (kinda NoSQL-
like)
• Database interoperability is now a major
feature; CassandraSE makes uses of this
• Can now request a row in JSON format
• And yes, you can name columns
finally ;)
16
Segmented MyISAM keycache
• Solves major read bottlenecks for
MyISAM
• MyISAM usage with many readers
17
BKA speedups
select max(l_extendedprice) from orders, lineitem where
o_orderdate between $DATE1 and $DATE2 and
l_orderkey=o_orderkey
18
Group commit in the binary log
19
Source: Mark Callaghan, https://
www.facebook.com/note.php?
note_id=10150261692455933
Group commit even faster in 10.0
• Slow fsync (removing checkpoint per commit
saving 1-in-3 fsyncs)
• Fast fsync (reduced stall on LOCK_log gives
speedup)
20
Group commit benchmark against 5.6
• MySQL 5.6 removes checkpoint per commit
• More complex thread scheduling, less grouping of commits
• Does not remove stall on LOCK_log, less grouping of commits
21
Threadpool 5.5 vs 5.1
22
MariaDB 10.0.2
• Support for atomic writes on FusionIO
DirectFS
• Optimizer collects & can use histogram-
based statistics for non-indexed columns
• Better table discovery, so FederatedX has
assisted discovery, Sequence engine
(creates ascending/descending
sequences, useful in joins)
23
Roadmap
• MariaDB is already a superset of features in
MySQL
• Merge is in 2 steps
– 10.0.x
– 10.1.x
• Plan is to have all important features of MySQL
5.6 by the time MariaDB 10.1.x is released as
stable
– For all practical purposes MariaDB 10.1.x will be a
drop in replacement to MySQL 5.6
24
LGPL client libraries
• LGPL client libraries for C & Java
• Works with MariaDB/MySQL/Percona
Server
• Developed by Monty Program Ab &
SkySQL Ab, released as LGPL 29 Nov
2012
• ODBC is in the works, sponsors are
welcome!
25
MariaDB Galera Cluster
• MariaDB Galera Cluster is made for
today’s cloud based environments. It is
fully read-write scalable, comes with
synchronous replication, allows multi-
master topologies, and guarantees no
lag or lost transactions.
• Currently 5.5-based, we see this as
important for 10.0 as well (merges will
happen closer to GA)
26
TokuDB
• It’s now opensource
• Official MariaDB binaries out within
days that includes TokuDB
• Tests & builds of TokuDB on multiple
platforms (think greater distribution)
27
CONNECT storage engine
• Made by Olivier Bertrand
• Read, write & update files in different
storage formats:
– .DBF (dBASE format)
– .CSV
– .INI
– XML
– ODBC
28
Benchmarks
• “Lies, damned lies, and statistics” -
Mark Twain
– http://blog.mariadb.org/sysbench-oltp-
mysql-5-6-vs-mariadb-10-0/
– http://dimitrik.free.fr/blog/archives/
2013/02/mysql-performance-mysql-56-
vs-mysql-55-vs-mariadb-55.html
• Yes, we’ve gotten Oracle to notice
MariaDB :-)
29
Continued commitments
• Security
– Since about a year now, we’re the go-to people for security
- good track record
• 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...)
30
Community involvement
• Many features since MariaDB 5.2 have come
from the community or are sponsored
features (5.3, 5.5)
• Knowledgebase has 2,600+ articles in English
• Yearly downloads of half a million (more users
from mirrors + distributions)
• Active mailing lists (stats on KB)
• Google Summer of Code 2013
• MariaDB User Groups
31
MariaDB is gaining popularity
• Wikipedia (English, German), Wikidata running
MariaDB 5.5
• Fedora, OpenSUSE shipping MariaDB as a
default
• Slackware, Chakra Linux, ArchLinux have
followed suit
• Many success stories at KB: Limelight
Networks, Nimbuzz, Paybox, FictionPress, OLX,
SlashGear, Web of Trust, SpamExperts, etc.
32
Monty Program Ab + SkySQL Ab join
forces
• Monty Program Ab & SkySQL Ab have
entered into a merger agreement
• Resulting company has best available
development & support people in the
MySQL ecosystem
• MariaDB Foundation ensures that there
never has to be a new fork
33
MariaDB Foundation
• Foundation is driver of MariaDB project
• Custodian of code, guardian of
community
• Foundation can never be controlled by
single entity or person
• Designed to be self-sustaining
34
MariaDB Foundation Goals
• Increase adoption of MariaDB
• Ensure sustainable high-quality efforts
to build, test and distribute MariaDB
• Ensure that community patches are
reviewed and adopted
• Guarantee a community voice
• Keep MariaDB compatible with MySQL
• Maintain mariadb.org
35
MariaDB Foundation
• More founders & sponsors are welcome
• Michael Widenius, CTO:
monty@mariadb.org
• Andrew Katz, Legal Counsel:
andrew@mariadb.org
• Simon Phipps, CEO: simon@mariadb.org
• Jeremy Zawodny (Craigslist), Mike
Milinkovich (Eclipse Foundation) on Board
36
Coming up next
• Merge SPIDER storage engine
• Column level encryption via MyDiamo
from Penta Security
• New optimizations for Fusion-IO
• You can shape the roadmap
37
Well supported
• Everyone supports MariaDB from a
support standpoint with the exception
of Oracle
• Visit the Expo Hall: SkySQL, Percona,
AccelerationDB, etc.
• Jelastic has it as PaaS too
38
FAQ
• Can I replicate from MySQL 5.6 to
MariaDB 10.x?
– Yes
• Can I replicate from MariaDB 10.x to
MariaDB 5.5?
– Yes
• Can I replicate from MariaDB 10.x to
MySQL 5.5/5.6?
– No
39
FAQ on tools
• SELECT VERSION() returns 10.0.1-
MariaDB
• Version string in handshake packet will
be 5.5.30-mysql-10.0.2-MariaDB
(mysql#68187, MDEV-4088)
• Tools should start recognising MariaDB
for additional feature-set (mytop,
HeidiSQL, etc.)
40
Conclusion
• MariaDB has 30 man years more of development
on-top of MySQL 5.5 with many different
features
• MariaDB is maintained by the people that
created original MySQL code
• We have 1 million man years of QA (by using the
community for QA)
• MariaDB is binary compatible with MySQL
• MariaDB is opensource, has more features, and
have no commercial extensions
41
Resources
• bugs: mariadb.org/jira
• maria-discuss@lists.launchpad.net
• maria-developers@lists.launchpad.net
• fb.com/MariaDB.dbms
• twitter: @mariadb
• google plus: +MariaDB
• #maria on irc.freenode.net
• http://kb.askmonty.org/
42
Q&A? Thanks
Michael “Monty” Widenius
monty@mariadb.org | @montywi
Colin Charles
colin@mariadb.org | @bytebot

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MariaDB 10 and what's new with the project

  • 1. MariaDB 10.0 & What’s New with The Project Michael “Monty” Widenius Colin Charles
  • 2. Who are we • Michael “Monty” Widenius – Creator of MySQL – Project leader at MariaDB, founder of Monty Program Ab – CTO, MariaDB Foundation – monty@mariadb.org | twitter: @montywi • Colin Charles – Chief Evangelist, MariaDB @ Monty Program Ab (soon SkySQL) – Formerly of MySQL – colin@mariadb.org | twitter: @bytebot 2
  • 3. Agenda • MariaDB 10.0 series introduction • Where we stand towards MySQL 5.6 • Features, including MariaDB Galera Cluster 3
  • 4. What’s MariaDB? • 38 months: major releases (5.1, 5.2, 5.3, 5.5, Galera Cluster) and 10.0 series • Still community developed, feature enhanced & backward compatible • maria-captains: 50% MP, 50% community including Sphinxsearch, SkySQL, Taobao, Percona, Codership, Facebook, & more... • GPLv2 server 4
  • 5. Goal hasn’t changed • uninstall mysql-server • install mariadb-server • it should “just work!” (& be compatible) • (or more recently, you just apt-get/yum install mariadb, and it removes mysql) • MySQL compatible: – data on disk & on the wire is same – same file names, sockets, port 5
  • 6. Why MariaDB 10.0? • The 5.5 merge took about a year (!) • In MariaDB 5.5, we have over 1.5 million lines of extra code ~61MB diff • MySQL 5.6 refactored with huge losses in commit history • We’re not a patch set against MySQL – MariaDB clearly does not depend on MySQL for future development 6
  • 7. MariaDB 10.0: In a nutshell... • Built on MariaDB 5.5 • Backported features from MySQL 5.6 • Multiple new features 7
  • 8. First, let’s start with some history • MariaDB 5.1 (MySQL-5.1 base) – Table elimination, new storage engines, cleanup, better tests, pool of threads • MariaDB 5.2 (MariaDB-5.1 base) – Virtual columns, extended user statistics, segmented MyISAM keycache • MariaDB 5.3 (MariaDB-5.2 base) – Biggest changes to optimizer (faster subqueries, joins, etc.) – Microsecond precision, faster HANDLER (HANDLER RED 50% faster w/530,000 qps), dynamic columns – Better replication (group commit, etc.) – HandlerSocket 8
  • 9. MariaDB 5.5 (MariaDB 5.3 + MySQL 5.5) • Opensource, more efficient threadpool • Non-blocking client library • New LIMIT ROWS EXAMINED option • Extended keys for XtraDB/InnoDB • New SphinxSE • Lots of security fixes, new status variables, etc. 9
  • 10. MariaDB 10.0 10 Date Version Status 12 Nov 2012 10.0.0 Alpha 6 Feb 2013 10.0.1 Alpha 24 Apr 2013 10.0.2 Alpha 10.0.3 Beta
  • 11. Backported features • InnoDB including TRANSACTION READ ONLY • PERFORMANCE_SCHEMA • Online ALTER TABLE (in-progress) • Optimizer – ORDER BY...LIMIT optimization (shows only few rows of a result set) • Re-implemented: – Error messages (w/system error string) – CURRENT_TIMESTAMP as DEFAULT for DATETIME columns – Global Transaction ID (10.0.2 - MDEV-26) – Parallel replication • New (optimizer) – EXISTS-TO-IN optimization 11
  • 12. Only in MariaDB 10.0: Multi-source replication • Work from Taobao • Many users partition data across many masters... now you can replicate many masters to a single slave • Great for analytical queries, complete backups, etc. 12
  • 13. Only in MariaDB 10.0: • SHOW EXPLAIN for <thread_id> gets the query plan for a running statement • Faster ALTER TABLE with unique keys for Aria & MyISAM • Per-thread memory usage (Taobao) – INFORMATION_SCHEMA.PROCESSLIST has MEMORY_USAGE & EXAMINED_ROWS now – SHOW STATUS has memory usage too 13
  • 14. Only in MariaDB 10.0: CassandraSE, LevelDB support • MariaDB as a “data platform” • Integration with NoSQL/Big Data DB, Apache Cassandra cluster, seen as a storage engine to MariaDB • Combine (join) data between Cassandra & MariaDB & Oracle (via CONNECT) • Write to Cassandra from SQL (SELECT, INSERT, UPDATE, DELETE) • LevelDB (in-progress) 14
  • 15. Only in MariaDB 10.0: Engine independent persistent statistics • InnoDB has persistent statistics in MySQL 5.6; we have an engine-independent version • These statistics aren’t limited by the SE API, and are used by query optimizer to choose best execution plan for each statement • Statistics collected for non-indexed columns too (unlike InnoDB’s) 15
  • 16. Dynamic columns • Store a different set of columns for every row in the table (kinda NoSQL- like) • Database interoperability is now a major feature; CassandraSE makes uses of this • Can now request a row in JSON format • And yes, you can name columns finally ;) 16
  • 17. Segmented MyISAM keycache • Solves major read bottlenecks for MyISAM • MyISAM usage with many readers 17
  • 18. BKA speedups select max(l_extendedprice) from orders, lineitem where o_orderdate between $DATE1 and $DATE2 and l_orderkey=o_orderkey 18
  • 19. Group commit in the binary log 19 Source: Mark Callaghan, https:// www.facebook.com/note.php? note_id=10150261692455933
  • 20. Group commit even faster in 10.0 • Slow fsync (removing checkpoint per commit saving 1-in-3 fsyncs) • Fast fsync (reduced stall on LOCK_log gives speedup) 20
  • 21. Group commit benchmark against 5.6 • MySQL 5.6 removes checkpoint per commit • More complex thread scheduling, less grouping of commits • Does not remove stall on LOCK_log, less grouping of commits 21
  • 23. MariaDB 10.0.2 • Support for atomic writes on FusionIO DirectFS • Optimizer collects & can use histogram- based statistics for non-indexed columns • Better table discovery, so FederatedX has assisted discovery, Sequence engine (creates ascending/descending sequences, useful in joins) 23
  • 24. Roadmap • MariaDB is already a superset of features in MySQL • Merge is in 2 steps – 10.0.x – 10.1.x • Plan is to have all important features of MySQL 5.6 by the time MariaDB 10.1.x is released as stable – For all practical purposes MariaDB 10.1.x will be a drop in replacement to MySQL 5.6 24
  • 25. LGPL client libraries • LGPL client libraries for C & Java • Works with MariaDB/MySQL/Percona Server • Developed by Monty Program Ab & SkySQL Ab, released as LGPL 29 Nov 2012 • ODBC is in the works, sponsors are welcome! 25
  • 26. MariaDB Galera Cluster • MariaDB Galera Cluster is made for today’s cloud based environments. It is fully read-write scalable, comes with synchronous replication, allows multi- master topologies, and guarantees no lag or lost transactions. • Currently 5.5-based, we see this as important for 10.0 as well (merges will happen closer to GA) 26
  • 27. TokuDB • It’s now opensource • Official MariaDB binaries out within days that includes TokuDB • Tests & builds of TokuDB on multiple platforms (think greater distribution) 27
  • 28. CONNECT storage engine • Made by Olivier Bertrand • Read, write & update files in different storage formats: – .DBF (dBASE format) – .CSV – .INI – XML – ODBC 28
  • 29. Benchmarks • “Lies, damned lies, and statistics” - Mark Twain – http://blog.mariadb.org/sysbench-oltp- mysql-5-6-vs-mariadb-10-0/ – http://dimitrik.free.fr/blog/archives/ 2013/02/mysql-performance-mysql-56- vs-mysql-55-vs-mariadb-55.html • Yes, we’ve gotten Oracle to notice MariaDB :-) 29
  • 30. Continued commitments • Security – Since about a year now, we’re the go-to people for security - good track record • 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...) 30
  • 31. Community involvement • Many features since MariaDB 5.2 have come from the community or are sponsored features (5.3, 5.5) • Knowledgebase has 2,600+ articles in English • Yearly downloads of half a million (more users from mirrors + distributions) • Active mailing lists (stats on KB) • Google Summer of Code 2013 • MariaDB User Groups 31
  • 32. MariaDB is gaining popularity • Wikipedia (English, German), Wikidata running MariaDB 5.5 • Fedora, OpenSUSE shipping MariaDB as a default • Slackware, Chakra Linux, ArchLinux have followed suit • Many success stories at KB: Limelight Networks, Nimbuzz, Paybox, FictionPress, OLX, SlashGear, Web of Trust, SpamExperts, etc. 32
  • 33. Monty Program Ab + SkySQL Ab join forces • Monty Program Ab & SkySQL Ab have entered into a merger agreement • Resulting company has best available development & support people in the MySQL ecosystem • MariaDB Foundation ensures that there never has to be a new fork 33
  • 34. MariaDB Foundation • Foundation is driver of MariaDB project • Custodian of code, guardian of community • Foundation can never be controlled by single entity or person • Designed to be self-sustaining 34
  • 35. MariaDB Foundation Goals • Increase adoption of MariaDB • Ensure sustainable high-quality efforts to build, test and distribute MariaDB • Ensure that community patches are reviewed and adopted • Guarantee a community voice • Keep MariaDB compatible with MySQL • Maintain mariadb.org 35
  • 36. MariaDB Foundation • More founders & sponsors are welcome • Michael Widenius, CTO: monty@mariadb.org • Andrew Katz, Legal Counsel: andrew@mariadb.org • Simon Phipps, CEO: simon@mariadb.org • Jeremy Zawodny (Craigslist), Mike Milinkovich (Eclipse Foundation) on Board 36
  • 37. Coming up next • Merge SPIDER storage engine • Column level encryption via MyDiamo from Penta Security • New optimizations for Fusion-IO • You can shape the roadmap 37
  • 38. Well supported • Everyone supports MariaDB from a support standpoint with the exception of Oracle • Visit the Expo Hall: SkySQL, Percona, AccelerationDB, etc. • Jelastic has it as PaaS too 38
  • 39. FAQ • Can I replicate from MySQL 5.6 to MariaDB 10.x? – Yes • Can I replicate from MariaDB 10.x to MariaDB 5.5? – Yes • Can I replicate from MariaDB 10.x to MySQL 5.5/5.6? – No 39
  • 40. FAQ on tools • SELECT VERSION() returns 10.0.1- MariaDB • Version string in handshake packet will be 5.5.30-mysql-10.0.2-MariaDB (mysql#68187, MDEV-4088) • Tools should start recognising MariaDB for additional feature-set (mytop, HeidiSQL, etc.) 40
  • 41. Conclusion • MariaDB has 30 man years more of development on-top of MySQL 5.5 with many different features • MariaDB is maintained by the people that created original MySQL code • We have 1 million man years of QA (by using the community for QA) • MariaDB is binary compatible with MySQL • MariaDB is opensource, has more features, and have no commercial extensions 41
  • 42. Resources • bugs: mariadb.org/jira • maria-discuss@lists.launchpad.net • maria-developers@lists.launchpad.net • fb.com/MariaDB.dbms • twitter: @mariadb • google plus: +MariaDB • #maria on irc.freenode.net • http://kb.askmonty.org/ 42
  • 43. Q&A? Thanks Michael “Monty” Widenius monty@mariadb.org | @montywi Colin Charles colin@mariadb.org | @bytebot