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Amazon RDS for Microsoft SQL Server makes it easy to set up, operate, and scale SQL Server deployments in the cloud. Amazon RDS Multi-AZ deployments provide enhanced availability and durability, making them a natural fit for production database workloads. Review this webinar to learn more about this easy way to achieve highly available operation of SQL Server. When you provision a Multi-AZ DB Instance, Amazon RDS automatically creates a primary DB Instance and synchronously replicates the data to a standby instance in a different Availability Zone (AZ). Each AZ runs on its own physically distinct, independent infrastructure, and is engineered to be highly reliable. Amazon RDS performs an automatic failover to the standby, with no administrator intervention required, so that your application can resume database operations as soon as the failover is complete.
Citation preview
High Availability SQL Server with
Amazon RDS
Sergei Sokolenko
Sr Product Manager
Amazon Relational Database Service
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If you host your databases on-premises
Power, HVAC, net
Rack & stack
Server maintenance
OS patches
DB s/w patches
Database backups
Scaling
High availability
DB s/w installs
OS installation
you
App optimization
If you host your databases on-premises
Power, HVAC, net
Rack & stack
Server maintenance
OS patches
DB s/w patches
Database backups
Scaling
High availability
DB s/w installs
OS installation
you
App optimization
If you host your databases in EC2
Power, HVAC, net
Rack & stack
Server maintenance
OS patches
DB s/w patches
Database backups
Scaling
High availability
DB s/w installs
OS installation
you
App optimization
If you host your databases in EC2
OS patches
DB s/w patches
Database backups
Scaling
High availability
DB s/w installs
you
App optimization
Power, HVAC, net
Rack & stack
Server maintenance
OS installation
If you choose a managed DB service like RDS SQL
Server
Power, HVAC, net
Rack & stack
Server maintenance
OS patches
DB s/w patches
Database backups
App optimization
High availability
DB s/w installs
OS installation
you
Scaling
Introducing Multi-AZ support for RDS SQL Server
Power, HVAC, net
Rack & stack
Server maintenance
OS patches
DB s/w patches
Database backups
App optimization
High availability
DB s/w installs
OS installation
you
Scaling
Amazon RDS Multi-AZ
Few clicks or One API call
High Availability via Amazon RDS Multi-AZ
Do It Yourself SQL Server
Potentially ~100+ Manual steps
Set up primary and standby instances
Create synchronous replication
Create and manage DNS entries
Detect instance failure conditions
Detect network failure conditions
Detect storage failure conditions
Decide when to fail-over….
Re-establish primary secondary connections.
What are Multi-AZ deployments?
• Primary and Standby in
different Availability Zones
• Synchronous replication of
Primary to Standby
• Automated failover to
Standby in case of failures
Application
Primary in
AZ “-1a”
Standby in
AZ “-1b”
mydb.{…}.rds.amazonaws.com
us-east-1
What are Multi-AZ deployments?
Application
Primary in
AZ “-1a”
Standby in
AZ “-1b”
mydb.{…}.rds.amazonaws.com
us-east-1
• Primary and Standby in
different Availability Zones
• Synchronous replication of
Primary to Standy
• Automated failover to
Standby in case of failures
What are Multi-AZ deployments?
Application
Primary in
AZ “-1b”
mydb.{…}.rds.amazonaws.com
us-east-1
• Primary and Standby in
different Availability Zones
• Synchronous replication of
Primary to Standy
• Automated failover to
Standby in case of failures
What are Multi-AZ deployments?
Application
Standby in
AZ “-1*”
Primary in
AZ “-1b”
us-east-1
mydb.{…}.rds.amazonaws.com
• Primary and Standby in
different Availability Zones
• Synchronous replication of
Primary to Standy
• Automated failover to
Standby in case of failures
Demo:
Creating a Multi-AZ database
How to change your application architecture for high
availability
Single-AZ RDS
database instance
Application, running on
Amazon EC2 instances
Elastic Load Balancer
instance
A resilient, still simple application architecture
RDS database instances:
Primary and Multi-AZ
standby
Application, in Amazon
EC2 instances, in each AZ
Elastic Load Balancer
instance
AZ “-1a” AZ “-1b” AZ “-1c”
… thriving even when an entire AZ becomes
unavailable
Old Standby becomes the
Primary, a new standby gets
created in an available AZ
Application instances
switch over to the new
Primary
Elastic Load Balancer
instance
AZ “-1a” AZ “-1b” AZ “-1c”
How to speed up failovers
• Failover Phases – Failure Detection,
– Standby Promotion,
– DNS Update and Propagation,
– Crash Recovery
• Crash Recovery = f(storage type)
• Provisioned IOPS recovery is faster
How to detect and test failovers
• Configure DB Events
notifications
• Receive Notifications
via Email or SMS
• Use the rds-reboot-db-instance
CLI to initiate a test failover
• Initiate failover via the Reboot
command in RDS Console
Demo:
Multi-AZ Failover
FAQ Q. What RDS database editions and versions are supported with Multi-AZ?
A. Standard and Enterprise Editions, SQL Server 2008R2 and 2012.
Q. Which AWS regions support SQL Server Multi-AZ?
A. US East (Northern Virginia), US West (Oregon), and EU (Ireland). We plan to support
other regions in the future.
Q. Can I setup Multi-AZ across multiple AWS regions?
A. Cross-region Multi-AZ is not supported.
A. Interested in cross region disaster recovery? Try our cross region snapshot copy.
Q. How do I manage Users, Logins, and Permissions on the Secondary?
A. RDS will automatically replicate changes on the Primary to the Secondary, including
Users, Logins, Permissions.
Sign up and learn more about Amazon RDS
• Amazon RDS for SQL Server home page:
http://aws.amazon.com/rds/sqlserver/
• Amazon RDS Frequently Asked Questions:
http://aws.amazon.com/rds/faqs/
• Links to Import Guides for each engine:
http://aws.amazon.com/rds/faqs/#9
Next steps
• Snapshot your DB
• Restore snapshot to a
test instance
• Convert it to Multi-AZ
• Adjust application to
retry DB connection
Next steps
• Snapshot your DB
• Restore snapshot to a
test instance
• Convert it to Multi-AZ
• Adjust application to
retry DB connection
Next steps
• Snapshot your DB
• Restore snapshot to a
test instance
• Convert it to Multi-AZ
• Adjust application to
retry DB connection Primary in
AZ “-1a”
Next steps
• Snapshot your DB
• Restore snapshot to a
test instance
• Convert it to Multi-AZ
• Adjust application to
retry DB connection Primary in
AZ “-1a”
Standby in
AZ “-1b”
Thank you
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