solutions for high availability and disaster recovery with mysql

7/31/2019 Solutions for High Availability and Disaster Recovery With MySQL

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USE IMPROVE EVANGELIZE

Solutions for HighAvailability andDisaster Recovery

with MySQLDetlef UlherrSun Microsystems


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Why Is High AvailabilityImportant?


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Why is HA Important?

Downtime is costly to the business

Components or systems failures are realpossibilities

Hardware, Software, Human Error, Disaster

Automated recovery is the goal

With a single physical system, single

points of failure have greater impactsNetwork card dies, CPU misbehaves, Disk drivecrashes ...HA Clusters and Solaris automate the

recovery process from inevitable


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HA Architectures forMySQL


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HA Architectures for MySQL

Shared nothing

MySQL replication

MySQL Cluster

Solaris Cluster / Open HA Cluster(planned)

Shared disk

Solaris Cluster / Open HA Cluster

VCS, HACMP, MC Serviceguard andsimilar.


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HA Architectures for MySQL (cont.)

Replicated Disk

Linux + DRBD

Solaris Cluster/Open HA cluster + AVS

(planned)

Solaris Cluster/Open HA cluster +SRDF/Truecopy


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MySQL and BusinessContinuity


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MySQL and Business ContinuityBuilding Blocks

Local HA

Infrastructure

Replication

Networks

Nameservice

DR Framework


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MySQL and Business ContinuityBuilding Blocks

Most important: People and Processes

Training

Management

Periodic DR tests


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MySQL's AvailabilityFeatures


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MySQL's Availability Features

ReplicationAsynchronous

Read mostly scale out

MySQL ClusterSynchronous

High write profile (Commit latency)


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When to use MySQL Cluster

Your database design is good for horizontalpartitioning.

The cluster should provide HA for MySQLonly.

You can tolerate downtimes while adding datanodes.

The memory is large enough for at least twice

all the indexes.


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MySQL and Solaris

Cluster / Open HACluster


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Open HA Cluster Benefits

A shared disk HA is simpler than replication orMySQL Cluster

Provides automated failover

Can support larger databases than MySQLCluster

Can be extended with the rest of the

application stack in the same Cluster. MySQLCluster has no framework to integrateapplications


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Open HA Cluster Benefits cont.

The Open HA Cluster MySQL agent leveragesall the rich infrastructure features of Open HACluster (strong membership, dependencies,...)

Can support Campus and Metro Clusters up to700 km

Supports MySQL replication in all its flavors


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Open HA Cluster Stack

Operating

System

ClusterInfrastructure

Agents

Applications

Heartbeats

Membership


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HA FailoverServiceApplication failoverWithin nodes or

containerContainers failoverFailover ofvolumes/filesystemsFailover IP address

Failover Service


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ScalableService

Software LoadBalancing

Global Network ServiProvides Global IP addrwith failure protection

Scalable Service


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Apache(Scalable)


MySQL (Failover)

Example: Apache andMySQL


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Heartbeats

Membership

Quorum

Disk Fencing Resource GroupManagerResource (application)dependenciesInter RG dependenciesRG affinities

HA FailoverServiceApplication failoverWithin nodes or

containerContainers failoverFailover IP address

Global FileService

Failover File

ScalableService

Software LoadBalancing


Monitoring

Solaris Cluster ArchitectureQuorumServer

USE IMPROVE EVANGELIZ


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Open HA Cluster and Virtualisation

Cluster control is in the global zone

Failover xVM

Failover Container

Zone Nodes

Cluster control is in the virtualization entity

Cluster in LDOMS

Zone Cluster



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Cluster Agents



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Open HA Cluster Stack

Operating

System

ClusterInfrastructure

Agents

Applications



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Cluster Agents (Data Services)

Applications run on cluster unmodified(off-the-shelf if it complies to some rules)

Cluster Agents are the glue layer

between applications and clusterinfrastructure

Application cannot break into the highavailability business on Solaris Cluster

without an agent!



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MySQL (Shared Disk)

MySQL

StorageLog. Host

Node1(:Zone1)

Node2(:Zone2)

Client



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MySQL (Replicated Disk) Global Zone

MySQL

StorageLog. Host

Node1 Node2

Storage based replicationTruecopySRDF



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MySQL (Shared Disk) Master - Slave

Node1 :Zone1Node1 :

Zone3

Node2 :Zone2Node2 :

Zone4

MySQL2

StorageLog. Host

MySQL1

StorageLog. Host

Mys Repl

Client



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E

MySQL (Shared Disk) Failover Zone

MySQL

StorageLog. Host

Node1 Node2

Zone1



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E

MySQL (Shared Disk) Zone Cluster

StorageLog. Host

Node1:Zon

e-cl

Node2:Zon

e-cl

MySQL



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E

MySQL (Shared Disk) Multiple Clusters

MySQL

Storage Log. Host

Node1 (Zone) Node2 (Zone)

MySQL

Storage Log. Host


MySQL Replication

Cluster 1 Cluster 2



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EMySQL (Shared Disk) replication outsidea cluster

MySQL

Storage Log. Host


Node3 (Zone)

MySQL Replication

Cluster 1



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E

Geographic ClusteringMulti-Cluster and Multi-Site capability

Site 1

Admin.Client

UserClient

Site 2

Optionalheartbeat networks

Optional storage network

StorageStorage



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E

MySQL and Open HA

ClusterFuture Configurations



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E

Solaris Cluster / OHAC FutureBenefits

Can give the option to use MySQL replicationas a replacement for shared storage

Can be extended to a full DR solution usingMySQL replication as the replication protocol

Can do loadbalancing between scalable slaves



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E

Solaris Cluster / OHAC FutureBenefits cont.

Can be extended to integrate the rest of theMySQL features like MySQL Cluster

Can leverage the Shared Address resourcetype to do load balancing for SQL nodes


G hi Cl t i


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E

Geographic ClusteringMulti-Cluster and Multi-Site capability

Site 1

Admin.Client

UserClient

Site 2

Optionalheartbeat networks

Optional storage network

StorageStorage

MySQL replication is

available soon



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E

MySQL Scalable Slaves

Shared Addr.

MySQL replication

MySQL-Slave

Storage

MySQL-Slave

Storage

MySQL-Master

Storage Log. Host

Loadbalancer

Client



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E

MySQL Scalable Slaves

Shared Addr.

Node2(:zone2)

Node1(:zone1)

MySQL replication

MySQL-Slave

Storage

MySQL-Slave

Storage

MySQL-Master

Storage Log. Host



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E

MySQL Shared Nothing (future)

Rolechanger

Log. Host

Node2 :Zone2 Slave

Node1 : Zone1 Master

Quorum

Server

MySQL-P MySQL-SMySQL replication


MySQL Cluster (Shared Nothing)


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MySQL Cluster (Shared Nothing)Local/Global Zone (future)

SQL-Node

Data-NodeData-Node

Data-Node

Data-Node

SQL-NodeSQL-Node

logh hsp

Mys queryNode5,6,7

logh hsp

Mys queryNode5,6,7

logh hsp

Mys queryNode5,6,7

logh hsp

Mys mgtNode 6,7

...

hsp

Mys dataNode1

hsp

Mys dataNode3

hspMys data

Node4hsp

Mys dataNode2

Shared Addr



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ReferencesCluster References

http://www.opensolaris.org/os/community/ha-clusters/ohac/

http://www.opensolaris.org/os/project/ha-mysql/

http://docs.sun.com/app/docs/prod/sun.cluster32#hic

Blogs

http://blogs.sun.com/sc/

http://blogs.sun.com/krishs/entry/deployment_and_failover_study_of

Blueprints

http://wikis.sun.com/display/BluePrints/High+Availability+MySQL+Database+Replication+with+Solaris+Zone+Cluster
http://www.opensolaris.org/os/community/ha-clusters/ohac/http://www.opensolaris.org/os/project/ha-mysql/http://docs.sun.com/app/docs/prod/sun.cluster32#hichttp://blogs.sun.com/sc/http://blogs.sun.com/krishs/entry/deployment_and_failover_study_ofhttp://wikis.sun.com/display/BluePrints/High+Availability+MySQL+Database+Replication+with+Solaris+Zone+Clusterhttp://wikis.sun.com/display/BluePrints/High+Availability+MySQL+Database+Replication+with+Solaris+Zone+Clusterhttp://blogs.sun.com/krishs/entry/deployment_and_failover_study_ofhttp://blogs.sun.com/sc/http://docs.sun.com/app/docs/prod/sun.cluster32#hichttp://www.opensolaris.org/os/project/ha-mysql/http://www.opensolaris.org/os/community/ha-clusters/ohac/


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Thank you!

Detlef [email protected]

open artwork and icons by chandan:http://blogs.sun.com/chandan
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