Download OpenEdge® Replication

DB-2: OpenEdge® Replication: How to
get Home in Time …
Brian Bowman
Sr. Solutions Engineer
Sandy Caiado
Sr. Solutions Engineer
OpenEdge Protecting Your Future
 Replication Overview
 OpenEdge Replication Process
 Failover, Secondary Replication and Failback
Sample

details
Questions
Image:
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge
Business Continuity Solutions
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication Plus
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication
Continuous Availability With
 Near real-time replication
• Near zero-latency
• No data loss
• Guaranteed data integrity
 Flexible database options
• Multiple target databases
• Read-only query access
 Easy deployment
 Automatic recovery
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Protecting Your Future
 Replication Overview
Sample
 OpenEdge Replication Process
Image:
 Failover, Secondary Replication, and Failback

details
Summary
Please
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Picture, …)
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Definitions
 Source database
• “Normal” production
• Original source of updates
 Target database
• Standby database
• Target location in OpenEdge Replication
 Single point of failure – a bad thing.
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Definitions
 Primary Replication
• Normal processing
• Primary machine performs updates
• Secondary machine receives updates
 Failover
• Primary machine fails
• Secondary machine becomes primary
 No Backup – a bad thing
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Definitions
 Secondary Replication
• Failed over mode
• Secondary machine performs updates
• Primary machine receives updates
 Failback
• The process to get primary machine back to
its original state and the secondary machine to
take on its original role to be the backup
 Failing to check your backup – a bad thing
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Definitions
 Transition
• Process where the databases change roles
• Configured to be either manual or automatic
 Synchronization
• Process to make sure the database on
primary and secondary are identical
• This is performed
– During database and replication startup
– Failure recovery processing
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication
Complete Configuration
Primary
Source
Database
Secondary
Database
Broker
Processes
AI Extents
Database
Broker
Processes
Repl
Queue
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Target
Database
Repl Server
DB-2: OpenEdge® Replication: How to get Home in Time …
Repl Agent
© 2007 Progress Software Corporation
OpenEdge Replication
Functionality
Primary Primary
Source
Database
AI Extents
Database
Broker
Processes
Repl
Queue
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 Configures and manages


remote agents
Sends all database
activity to its replication
agents
Controls replication
agents
Repl Server
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication
Functionality
 Receives database


Secondary
Database
Broker
Processes
activity from replication
server
Performs continuous
roll-forward to target
database
Types of Agents
• Asynchronous
• Synchronous
Target
Database
Repl Agent
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Modes of Replication
Asynchronous
Primary
Target One
Target
Database
Repl Agent
Source
Database
Target Two
Target
Database
Repl Agent
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Modes of Replication
Synchronous
Primary
Source
Database
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DB-2: OpenEdge® Replication: How to get Home in Time …
Secondary
Repl Agent
Target
Database
© 2007 Progress Software Corporation
OpenEdge Replication Failure Conditions
Primary
Secondary
Source
Database
X
Database
Broker
Processes
AI Extents
Database
Broker
Processes
X
Repl
Queue
Repl Server
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X
DB-2: OpenEdge® Replication: How to get Home in Time …
Target
Database
Repl Agent
© 2007 Progress Software Corporation
How Does it Work?
 Plugs into after-image sub-system
 TCP connection between server and agent
 Queue for transfers on source
 Agent periodically (every 10 blocks) polls

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server for heart beat (asynchronous mode)
Agent will also communicate a
synchronization point (ie. extent switch) back
to the server
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Additional Considerations
 Schema changes are replicated
 AI extents must be managed
• AI Management Utility!!!
 Ensure that you have enough AI extents
space - extents will remain “locked” until they
are replicated in entirety
PSDN Whitepaper – “Managing AI with and
OpenEdge Replication”
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Machine Setup
 Source and target machines must
• Have identical architectures
• Be running the same operating system
• Be connected via TCP/IP
 The target machine must have disk space
comparable to the source machine
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Progress Requirements
 Progress 9.1E for Fathom Replication 3.0A
 OpenEdge 10.0B+ for OpenEdge Replication

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(failback capabilities enable in 10.1A)
After-imaging must be enabled
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Replication Configuration Properties
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Primary Property File
Secondary Property File
[server]
…
[control-agent.DELTA]
…
[transition]
…
[agent]
…
[agent]
…
[transition]
…
[server]
…
[control-agent.DELTA]
…
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Protecting Your Future
 Replication Overview
Sample
 OpenEdge Replication Process
Image:
 Failover, Secondary Replication, and Failback
Please
 Summary
replace it
(Insert,
Picture, …)
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
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DB-2: OpenEdge® Replication: How to get Home in Time …
Primary Replication
Secondary Replication
Primary Replication
Secondary
Primary
Replication Modes
© 2007 Progress Software Corporation
Enabling OpenEdge Replication
Secondary
Primary
Replication enabled
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
Replication enabled
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Primary Replication Configuration Properties
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Primary Property File
Secondary Property File
[server]
control-agents=DELTA
database=ALPHA
[control-agent.DELTA]
name=DELTA
database=BRAVO
host=nbPrimary
port=4501
[agent]
name=DELTA
database=BRAVO
proserve ALPHA
–S <DB Port>
–DBService replserv
proserve BRAVO
–S 4501
–DBService replagent
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Additional Configuration Properties
Primary Property File
Secondary Property File
[agent]
[server]
connect-timeout=600
transition=manual
listener-minport=10024
transition-timeout=60
listener-maxport=20000
defer-agent-startup=720
agent-shutdown-action=recovery
[control-agent.DELTA]
replication-method=async
critical=0
name=secondary
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
Replication enabled
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Source fails
Transition
to source
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Deployment – Fail Over
 Manual
• Transition target to production

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dsrutil target -C transition agent
Auto
• Database is automatically transitioned to
production
Start target database server
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
FR enabled
Source fails
Transition
to source
Updates
begin
Target shutdown
and re-started
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Automated Failback
Transition Configuration Properties
Property File Transition Section
Key:
Agent Management
After Image Management
Database Management
Backup Management
[transition]
transition-to-agent=BRAVO
database-role=reverse
auto-begin-ai=1
auto-add-ai-areas=1
ai-structure-file=primaryai.st
restart-after-transition=1
source-startup-arguments= -pf primary.source.pf
target-startup-arguments= -pf primary.target.pf
backup-method=full-offline
backup-arguments=secondary.bak
incremental-backup-arguments=secondary.incr.bak
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
Replication enabled
Source fails
Restore backup
Online
Transition
backup
to source
Updates
begin
Target shutdown
and re-started
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Secondary Replication Configuration Properties
Primary Property File
Secondary Property File
[agent]
name=ECHO
database=ALPHA
[server]
control-agents=ECHO
database=BRAVO
[control-agent.ECHO]
name=ECHO
database=ALPHA
host=nbSecondary
port=4501
proserve ALPHA
–S 4501
–DBService replagent
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DB-2: OpenEdge® Replication: How to get Home in Time …
proserve BRAVO
–S <DB Port>
–DBService replserv
© 2007 Progress Software Corporation
Additional Secondary Replication Properties
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Primary Property File
Secondary Property File
[agent]
listener-minport=10024
listener-maxport=20000
connect-timeout=600
[server]
transition=auto
transition-timeout=60
name=primary
defer-agent-startup=720
agent-shutdown-action=recovery
[control-agent.ECHO]
replication-method=async
connect-timeout=600
critical=0
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
Replication enabled
Source fails
Reverse roles
Restore backup
Online
Transition
backup
to source
Updates
begin
Target shutdown
and re-started
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failover Time Line
Secondary
Primary
Replication enabled
Source fails
Reverse roles
Restore backup
Online
Transition
backup
to source
Updates
begin
Target shutdown
and re-started
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DB-2: OpenEdge® Replication: How to get Home in Time …
Target & Source
shutdown & re-started
© 2007 Progress Software Corporation
Replication Failback Transition
 Databases can be
•
•
•
•
•

Synchronized
shut down
Transitioned to new roles
AI added and enabled
and restarted
with a single command
Process is initiated from the source database
side
DSRUTIL database –C transition [failover]
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Replication Failback Transition
 Transition based on the properties files
 Transition will occur based on the following
criteria:
•
•
•
•
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Source or target
Online or offline
Is Replication Server or Agent running?
Has failure just occurred?
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
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DB-2: OpenEdge® Replication: How to get Home in Time …
Primary Replication
Secondary Replication
Primary Replication
Secondary
Primary
Replication Modes
© 2007 Progress Software Corporation
OpenEdge Replication Enables…
 Online transitions
 AI automation
• Extent add
• Start
 Auto DB control
• Shutdown after transition
• Auto restart
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Replication also enables…
 Scheduled system maintenance capabilities
 Reporting on Target Database
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
In Summary
 Protect your business
 Protect your data
 Protects your future with
OpenEdge Replication
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Where to go from here

Other Exchange sessions:
• COMP-10 OpenEdge Management and Replication –
Divide et impera! (June 13, 8am)
• COMP-15 Disaster Recovery Planning (June 13,
3:30pm)

PSDN
• http://www.psdn.com/library/kbcategory.jspa?categoryI
D=555
• Whitepapers!

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Professional Services for assistance
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Questions?
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Thank you for
your time!
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication Release 10
Failover Process
1. Primary database is Lost
•
Determine which ai extents to apply
dsrutil target -C recovery
•
Manually apply source AI extents on target (Optional)
dsrutil db –C applyextent
2. Secondary database transition
• Source or normal / online or offline
dsrutil db –C transition
3. AI extents added and AI started
[normal AI enablement process]
4. Secondary restarted
• Manual or automatic
proserve …
5. Awaits communication to Primary
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication Release 10.1B
Enable Secondary Replication
 Primary machine repaired
 Online backup of secondary db
 Copy backup to primary machine
 Make db on primary machine the target
prorest primary bkupfile [–REPLTransition]
 DB on secondary machine acting as source
and replicating to target on primary
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
OpenEdge Replication Release 10.1B
Failback Specifics
 Schedule time to get db on primary machine


transitioned back to source
No activity on either machine
2 methods:
• Automated Failback
• Controlled Transition
 On secondary machine:
dsrutil secondary –C transition failover
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failback
Automated Failback








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Initiated on Source database (on Secondary
machine)
• <insert command>
Ensures databases are in sync
Backs up databases (periodically for recovery)
Shuts down database
Does AI management (if requested)
Reverses Roles
Finishes AI management (if requested)
Restarts Databases
DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation
Failback
Controlled Transition
 Controlled Transition
• Verify synchronization:
– Look at db log file or
– Dsrutil source –C status –detail
– Shutdown databases
– On primary machine transition to source
 Dsrutil primary –C transition
– On secondary machine transition to target
 Dsrutil secondary –C transition
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DB-2: OpenEdge® Replication: How to get Home in Time …
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DB-2: OpenEdge® Replication: How to get Home in Time …
© 2007 Progress Software Corporation