Solving MySQL high availability issues with Continuent Tungsten

1. MySQL High Availability
Power and Usability
Giuseppe Maxia
QA Director - Continuent, Inc
©Continuent 2012.
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2. About me
• Giuseppe Maxia, a.k.a. The Data Charmer
• Worked in the MySQL team (2006-2010)
A
• Now QA Director, Continuent, Inc
• Using MySQL since 2001
• Creator and maintainer of MySQL Sandbox
• Community Contributor of the year (2006, 2011)
• Oracle ACE (2011)
• Oracle ACE Director (2012)
• BLOG: http://datacharmer.blogspot.com
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3. ToC
• What a demanding database user wants
• easy switch
• easy and automated failover
• easy recovery
• disaster recovery stand-by site
• easy site switch and failover
• easy site recovery
• What Continuent Tungsten does
• all of the above
©Continuent 2012 3
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4. What's an EASY failover
• A failover or switch is EASY if:
• I can promote a slave easily
• I can tell easily the other slaves who is new master
• I can get a failover to happen automatically
• Applications keep working without changes
• Failovers only happen when the server is truly dead
©Continuent 2012 4
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5. Translation: What a DB user wants is:
• Transparency
Or
• the ability of using a RESILIENT database
system without need to know what's going on
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6. How a non-HA system works
App Logic
MySQL Client API
W
master
slave slave
R R
load balancer
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7. How a non-HA system works (after a
switch)
App Logic
MySQL Client API
W
?
master
switch
slave slave
R R ?
load balancer
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8. App Logic App Logic
Tungsten Connector Tungsten Connector
Monitoring and control
Monitoring and control
db2 db1 db3
Manager Manager Manager
Replicator Replicator Replicator
Slave Master Slave
Data Service: sj
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9. How a Tungsten HA system works
App Logic
MySQL Client API
W
R
load balancer
R
©Continuent 2012 9
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10. How a Tungsten HA system works
App Logic
MySQL Client API
W
switch
R
load balancer
R
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11. Multiple site demo
©Continuent 2012 11
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12. Installation principles
• Install from one location only
• Remote installation of all services
• No partial installations: Either all servers are
OK, or none will be installed
• Parallel installation
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13. What does the installation do
1: Validate all servers
host4 host1 host2 host3
Report all errors
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14. What does the installation do
1: (again) Validate all servers
host4 host1 host2 host3
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15. What does the installation do
2: install Tungsten in all servers
host4
$CONTINUENT_ host1
HOME/ host2
config/ host3
releases/
backups/
thl/
tungsten/
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16. Installation demo
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17. Standard HA system demo
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18. How a "smart scale" Tungsten HA
system works
W
App Logic MySQL Client API R
R
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19. Standard HA "smart scale" system
demo
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20. How a multi site (non HA) system
works
App Logic
MySQL Client API
W
master relay
slave
slave slave slave
R R
load balancer
©Continuent 2012 20
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21. How a multi site (non HA) system
works
App Logic
MySQL Client API
W
master relay
slave
slave slave slave
R R
load balancer
©Continuent 2012 21
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22. How a multi site (non HA) system
works
App Logic
MySQL Client API
W
master relay
slave
slave slave slave
R R
load balancer
©Continuent 2012 22
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23. How a multi-site Tungsten system
works App Logic
MySQL Client API
W
R R
load balancer
©Continuent 2012 23
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24. How a multi-site Tungsten system
works App Logic
MySQL Client API
W
R R
load balancer
©Continuent 2012 24
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25. How a multi-site Tungsten system
works App Logic
MySQL Client API
W
R R
load balancer
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26. Parting thoughts
• The key elements of HA are:
• transparency
• ease of use
• Continuent Tungsten
• makes cluster usage transparent
• o!ers automatic failover
• makes cluster management easy
• deals with multiple sites with great ease
©Continuent 2012. 26
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27. 560 S. Winchester Blvd., Suite 500 Our Blogs:
San Jose, CA 95128 http://scale-out-blog.blogspot.com
Tel +1 (866) 998-3642 http://datacharmer.blogspot.com
Fax +1 (408) 668-1009 http://flyingclusters.blogspot.com
e-mail: sales@continuent.com
Continuent Website:
http://www.continuent.com
Tungsten Replicator 2.0:
http://code.google.com/p/tungsten-replicator
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