©Continuent 2012.

Industrial-Strength MySQL Applications using Percona

and ContinuentRobert Hodges, CEO Continuent

Peter Zaitsev, CEO Percona

©Continuent 2012

Introducing Continuent

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• The leading provider of clustering and replication for open source DBMS

• Our Product: Continuent Tungsten

• Clustering - Commercial-grade HA, performance scaling and data management for MySQL

• Replication - Flexible, high-performance data movement

• Optimized for use with Percona Server and XtraBackup

©Continuent 2012

Quick Continuent Facts

• Largest Tungsten clustering installation processes about 500M transactions each day

• Tungsten Replicator was application of the year at the 2011 MySQL User Conference

• Continuent is well known in the MySQL community for its clustering and replication

• Over 80 customers currently deployed

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©Continuent 2012

Select Continuent Customers

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©Continuent 2012

Introducing Tungsten Clustering

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Tungsten clusters combine o!-the-shelf open source DBMS servers into data services with:

• Fast failover• Zero-downtime maintenance • Scaling of load on replicas

...without app changes or data migration

AmazonUS West

apache/php

GonzoPortal.com

Connector Connector

©Continuent 2012

Doesn’t Replication Do This Already?

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Application

Libmysqlclient.a

Application

Libmysqlclient.a

Replicator

Db2

Replicator

Db3Db1

Replicator

Slave SlaveMaster

©Continuent 2012

Replication Limitations

Replication alone cannot enable constant access to data...

• What happens if the master fails?

• What happens if a slave is lagging too far behind to be usable?

• How do I maintain the DBMS without stopping apps?

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©Continuent 2012

From Replicating to Clustering

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Application

Tungsten Connector

Application

Tungsten Connector

Replicator

Db2

Replicator

Db3Db1

Replicator

Slave SlaveMaster

Manager Manager Manager

Monitoring and Control

Monitoring and Control

Data Service: sjc

©Continuent 2012

Automatic Failover

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Application

Tungsten Connector

©Continuent 2012

Automatic Failover

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Application

Tungsten Connector

1. Detect non-responsivemaster

2. Halt master connections

©Continuent 2012

Automatic Failover

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Application

Tungsten Connector

3. Select most advanced slave and wait for pending transactions to apply

©Continuent 2012

Automatic Failover

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Application

Tungsten Connector

4. Promote to master, reconfigure slave(s), and re-enable connections

©Continuent 2012

Automatic Failover

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Application

Tungsten Connector

5. Recover failed master

©Continuent 2012

Rolling Schema Upgrade

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Final UpgradeSwitchSlave Upgrade Slave Upgrade

• Shun slave 1, run upgrade, and return to cluster. Discard and recover on failure

• Upgrade old master. Cluster schema is now fully upgraded

• Repeat for additional slave(s)

• Switch master to promote an upgraded slave

©Continuent 2012

Backup, Recovery, and Restore

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• Backups

/cluster  >  datasource  DB1  backup

• Recover

/cluster  >  datasource  DB2  recover

• Restore

/cluster  >  datasource  DB2  restore

• Out-of-box support for XtraBackup/mysqldump; simple integration for others

©Continuent 2012

Tungsten Connector Basics

• Any MySQL/PostgreSQL client can connect

• Initiates connections using JDBC

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App NativeprotocolCOM_QUERY

COM_INIT_DBCOM_DROP_DB

Connector

©Continuent 2012

Tungsten Connector Basics

• Pass-through operation after connection

• Full transparency & low overhead for clients

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App

Protocol packetCOM_QUERY

select * from t

ConnectorProtocol packet

OKResultSet Rows:1

©Continuent 2012

Read-Write Splitting Options

1. Explicit connection to slave: Let Tungsten pick a replica with minimum latency

2. Simple read-write splitting: Route auto-commit reads to slaves

3. SmartScale: Writers see their own writes but load balance unrelated reads

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©Continuent 2012

SmartScale Session Load Balancing

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App

Connect/Write

Connector

TransactionHistory Log

Slavereplay

position

Session xSession y

Slave DBMS

MasterDBMS

Slave DBMS

Initial Write

©Continuent 2012

SmartScale Session Load Balancing

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AppRead

Connector

TransactionHistory Log

Slavereplay

position

Session xSession y

Slave DBMS

MasterDBMS

Slave DBMS

Read from master

NO read from slave!

©Continuent 2012

SmartScale Session Load Balancing

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AppRead

Connector

TransactionHistory Log

Slavereplay

position

Session x

Slave DBMS

MasterDBMS

Slave DBMS

Read from master

Read from slave

©Continuent 2012

DEMO!

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©Continuent 2012

Tungsten Does DR Sites Too!

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App Server+ Connector

App Server+ Connector

Master Slave

San Jose New York

sj_nyc

©Continuent 2012

How Do I Obtain Tungsten?

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• Register at Continuent to get clustering downloadshttp://www.continuent.com/downloads/software

• Documentation is available on Continuent website

• Advanced MySQL replication without clustering is available from Tungsten Replicator project on code.google.comhttp://code.google.com/p/tungsten-replicator/

©Continuent 2012

Percona + Continuent = Industrial-Strength

• Percona Server and XtraBackup provide reliable, fast data management

• Tungsten extends Percona to enable 24x7 access and improve resource utilization

• Fast failover

• Zero-downtime maintenance

• SQL load balancing

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©Continuent 2012.

Contact:http://www.continuent.com

Blog:www.continuent.com/news/blogs

Contact:http://www.percona.com

Blog:www.mysqlperformanceblog.com

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