This document discusses the history and features of Drizzle, an open source relational database management system (RDBMS). Drizzle was created in response to Oracle's acquisition of Sun Microsystems and MySQL. It uses a microkernel design and pluggable interfaces to provide features like asynchronous replication, table functions for metadata access, and integrated hot backups without locking for high availability. The document promotes Drizzle's scalability and lack of "gotchas" compared to other database solutions.

1. Virtualizing and Scaling
for the Future
Tuesday, March 29, 2011

2. Who am I?
Was Director of Architecture for MySQL
Founder/CTO Data Differential
Drizzle
Gearman
Memcached
Tuesday, March 29, 2011

3. In the beginning...
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4. • 2008 Sun buys MySQL
• 2008 Drizzle forks from MySQL
• 2009 Oracle buys Sun
• 2010 Drizzle Developers split from Oracle
• 2011 First GA Release, Drizzle7
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5. Drizzle
• Entirely Open Source RDBMS
• C++, with a MicroKernel Design
• No Gotchas
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6. Drizzle7
(Quick Update)
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7. Today’s Pluggable
Interfaces
• Replication • Table Functions
• Storage Engine • Functions
• Logging • Protocol
• Authentication • Query Rewrite
• Authorization • XA
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8. HTTP Replication
Client Client
Cloud Service Client
HTTP Blob MySQL Drizzle
Streaming
SQL
Listener
Logging
Query Memcached Parser
Cache
Optimizer
Memcached Error Reporting
Executioner
Gearman Storage System
MicroKernel
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9. Replication
• Google Protocol Buffer Based
• Replicates row transformations.
• Integrates today with RabbitMQ, Casandra.
Memcached, Gearman
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10. INSERT
INSERT
Stored
Transactionally
UPDATE
INSERT
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11. Slave
Master Slave
Slave
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12. Slave
Master Slave
Slave
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13. Master
Master Master
Master
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14. What group commit
problem?
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15. Group Commit?
Transaction
Log
Database
Kernel
Binlog
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16. No Group Commit
Required
Database Transaction
Kernel Log
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17. libDrizzle
• Supports Drizzle (and MySQL, and SQLite)
• Asynchronous
• BSD
• Lawyer free
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18. NoSQL Stream Access
Amazon S3 Client
Instance
Storage
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19. Is there more?
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20. No Gotchas
• No NULL when you don’t want NULL
• No ALTER TABLES that fake’ it
• Real datetime (64bit), with microseconds
• IPV6
• No updates that “half complete”
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21. Authentication/
Authorization
• No Cost Authentication
• PAM, LDAP, HTTP
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22. Table Functions
• TABLE_CACHE
• TABLE_DEFINITION_CACHE
• SHOW TEMPORARY TABLES
• All new SQL compliant information_schema
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23. Data Dictionay
• Separate Information Schema for ANSI SQL
access.
• All based on Table Functions
• No Materialization
• Single Execution Path
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24. Интернет является UTF-8.
Web UTF - 8
The Web is UTF-8.
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25. How about locks?
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26. SHOW PROCESSLIST
(now based on table functions)
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27. --skip-grants
(none of the current GRANTs require LOCKS
actually…)
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28. store_lock()
(all engines are not created equally)
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29. 120+ Developers Since
Day One
26/36 on average each month
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30. Drizzle 7+
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31. Table Table
Schema Table Schema Table
Table Table
Users
Table Table
Schema Table Schema Table
Table Table
Instance
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32. Users Users
Table Table
Schema Table Schema Table
Table Table
Instance
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33. • Cuts the 30/40% hit from virtualizing
• Single instance maintenance
• Still allows for IO spread on San/NAS
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34. Hot Backup
• Supports Partial Backup
• No locking
• Single solution, point-in-time recovery in a
single solution.
• Comes with the database.
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35. http://drizzle.org
http://planetdrizzle.org
Freenode #drizzle
Tuesday, March 29, 2011