MySQL High Availability Solutions

Event : AIOUG BANGALORE Chapter Monthly
Date : 12 Oct 2019
MySQL HA Solutions
Presenter
Karthik P R,
CEO Mydbops

Karthik P R
MySQL Consultant
Founder / CEO Mydbops
About Me
Around 9+ Years of experience with MySQL.
Consulted huge MySQL Farms in India and US
Ex Yahoo! ( MySQL DBA )
Active MySQL Community Contributor
Tech Speaker
Founder Mydbops ( 2016 )

Founded in 2016
Grown from a 2 Member team to 30 Members ( 2019)
Consulting and Services on MySQL / MongoDB
Managed Services for MySQL / MongoDB
20+ Certi ed MySQL DBA
AWS Partner for databases
300+ Clients and 50+ in Managed services
About Mydbops
Mydbops
Scaling Database Operations

MySQL an overview
Journey of Most Famous Open Source Database
Initial Release May 1995 - MySQL AB
Michael Widenius ( Main Author)
2008 Sun Microsystem Acquired MySQL AB
2010 Jan Oracle acquired Sun Microsystems
2010 MariaDB was formed
2015 Oct MySQL 5.7 was released
2018 Apr MySQL 8 was released

Role of MySQL in Open Source World
Widely used open Source RDBMS
Ranks 2nd in DB engine ranking ( Following Oracle)
Most widely used service in Cloud
Adopted by top tech companies and many startups
Scales well for most work load
Very strong MySQL Open Source Community
Popularity grows day by day

Role of MySQL in Open Source World

High Availability
Reduced downtime (Zero downtime in ideal world)
Ensure system performance ( Latency )
Data consistency across nodes
HA = Redundancy

Uptime
PercentilePercentile
TargetTarget
Max DowntimeMax Downtime
( in a Year )( in a Year )
99% 3.65 Days
99.5% 1.83 Days
99.9% 8.76 Hours
99.9% 52.56 Minutes
99.999% 5.25 Minutes
99.9999% 31.5 Minutes

High Availability
Replication is the common Solution in MySQL
Types of Replication
Async Replication ( Native Replication )
Sync Replication ( Virtually Synchronous )

MySQL Native Replication Architecture

Native MySQL Replication
Replication is a most notable feature in MySQL
Native MySQL Replication is logical replication
Binary logs helps in recording changes
Replication is Asynchronous
Scale out more with replication
Row based replication is available from MySQL 5.1
Binlog Co-ordinates or GTID based replication

Master - Master ( Active - Active )

Master - Master ( Active - Passive )

Advantages of Native Replication
Simple solution and easy to mange .
GTID can make switch over / Fail over easy.
Multi threaded (Parallel) Replication can make sync faster.
Much reduced latency comparing to other solutions.
Good Solution for WAN based data replication.
Data Filtering can be done.
Huge transactions are supported.
Most widely adapted solution

Dis Advantages of Native Replication
There is a data lag always.
Data can drift / Manual override can break replication.
Huge transactions can cause heavy lag.
Need tools for Automatic master promotion

MySQL Cluster Solutions
Synchronous Replication
Galera Cluster
Group Replication
NDB Cluster

MySQL Cluster Solutions
Synchronous Replication using two phase Commit
Latency at writes
Read/Writes from any node
Shared Nothing Architecture
Auto master promotion ( Single Writer mode )
Ensure data consistency

Galera Cluster
Third party Replication Plugin
Codership Maintains the code
Virtually Synchronous
Multi Master Cluster
Zero Slave lag
Quorum has to be maintained
More stable and proven solution

Galera Cluster
Need minimum three nodes
Replication is handled wsrep plugin
Percona Cluster or MariaDB Cluster (Bundled )
Auto Node Provision
ProxySQL / Maxscale integration makes it better
Supports MySQL 5.5,5.6,5.7 and 8.0

MySQL Group Replication
Inbuilt within MySQL
Uses MySQL Binary log for replication
Ease deployment with MySQL Shell
Auto Node Provision with Clone plugin.
ProxySQL integration makes it better.
MySQL Router can be used too.
Supports MySQL 5.7 and 8.0

MySQL Group Replication
Supports Single writer mode
GTID and INNODB engine only
Works for OLTP work load.
More stable in MySQL 8.0.
Supports all Platforms ( Windows too)

MySQL HA Solution on Cloud ( AWS )
DBaaS ( RDS / Aurora )
RDS MySQL inbuilt Multi AZ
Aurora MySQL is Amazon Proprietary
Aurora uses storage based replication
Good for read scaling
Single Master & Multi readers ( Single read end points ).
Maxscale and ProxySQL integration.
Aurora Supports only MySQL 5.6 & 5.7

MySQL Load Balancers and HA
Database Availability is hard
Seem less switchover needs Load Balancers.
TCP Load balancers
HAProxy
MySQL Router
SQL aware load Balancers
ProxySQL
Maxscale

MySQL Load Balancers and HA
SQL Intelligence helps in
Master switch ( traffic Route )
Read write Balancing
Query Rewrites
Query Caching
Query Filtering
Support all Architectures

Tools for MySQL HA
Orchestrator
Helps in MySQL Replication topology handling
Smart node picking
GUI Support ,CLI , API
Created and Maintained by Github Engineers
MySQL MHA
Automated Failover for Native replication
Made by Yoshinori ( Facebook )

DO YOU HAVE ANY QUESTIONS?
THANK YOU!

MySQL High Availability Solutions

More Related Content

What's hot

Similar to MySQL High Availability Solutions

More from Mydbops

Recently uploaded

MySQL High Availability Solutions