View
215
Download
0
Category
Preview:
Citation preview
1© Copyright 2008 EMC Corporation. All rights reserved.
Planning for Remote Replication
Larry AndersonEMC Technical Consultant for Business Continuity
2© Copyright 2008 EMC Corporation. All rights reserved.
Agenda
Barriers to DR
Planning Process
Bandwidth sizing data– DR Planning
Replication Modes
WAN Optimization
Application Consistency
3© Copyright 2008 EMC Corporation. All rights reserved.
The Core Problem
As long as the motor isn’t started, everything is fine
4© Copyright 2008 EMC Corporation. All rights reserved.
What Are The Barriers to Disaster Recovery?
Cost of the network– Dedicated, high quality bandwidth
Cost of equipment– Need extra disk capacity &/or cache
Application complexity – Which applications need to be replicated?– Which applications are grouped together?
Coordination of total solution– Servers, people, data, applications– Disaster recovery processes
5© Copyright 2008 EMC Corporation. All rights reserved.
Business Continuity Planning
Definition
Project InitiationProject Initiation
Risk AssessmentRisk Assessment
Business ImpactAnalysis
Business ImpactAnalysis
Plan RecoveryStrategies
Plan RecoveryStrategies
Strategy
Gap AnalysisGap Analysis
SolutionAlternatives
SolutionAlternatives
Facilitated WorkshopFacilitated Workshop
Document Recommendations
Document Recommendations
Meta Data Capture
Meta Data Capture
NetworkArchitecture
NetworkArchitecture
DataArchitecture
DataArchitecture
Design
Describe Client/ServerArchitecture
Describe Client/ServerArchitecture
Develop Policies& Procedures
Develop Policies& Procedures
Solution
TestingTesting
Pre-ActivationMeasurementPre-ActivationMeasurement
ActivationActivation
Post-ActivationMeasurement
Post-ActivationMeasurement
Manage
Review BusinessDrivers
Review BusinessDrivers
Review ITProceduresReview IT
Procedures
Gap AnalysisGap Analysis
DR/BC Trial ParticipationDR/BC Trial Participation
DocumentImprovements
DocumentImprovements
6© Copyright 2008 EMC Corporation. All rights reserved.
RPO
Decision Drivers and Tradeoffs
Primary Decision Drivers
Business Considerations
Technical Considerations
Cost
Amortization
RTO
Performance
Availability
Capacity
Recovery
7© Copyright 2008 EMC Corporation. All rights reserved.
PrimaryA
Secondary
-or-
Tertiary
Dual Primary
or-Secondary
Synch
Asynch
Asynch
AsynchNetwork
Availability Strategies:Disaster Recovery (DR)High Availability (HA)Continuous Availability (CA)
In-Region
Out-Region
Commercial Hotsites
-Acxiom-Sungard
8© Copyright 2008 EMC Corporation. All rights reserved.
Typical Bandwidth Comparisons
Bandwidth requirements– Synch (Metropolitan) requires highest bandwidth,– Asynch mitigates network bandwidth by increasing RPO to minutes– Asynch Tier 2 mitigates network bandwidth by increasing RPO to hours
Supporting analyses– Asynch Tier 0 & 1 analyzes peak writes/second over time period– Asynch Tier 2 analyzes maximum track changes over time period
WAN optimization products can have a big impact on the required bandwidth requirements.
Time
B/W
Asynch (Out of Region) B/W Needs RPO: Minutes
Asynch Tier 2 (Out of Region) B/W Needs RPO: Hours
Synch (Metro) B/W Needs RPO: Zero
Co
sts
9© Copyright 2008 EMC Corporation. All rights reserved.
Data Collections for Bandwidth Modeling
For EMC Environments– Symmetrix: Control Center Performance Monitor Data– Symmetrix: Service Processor based data collections (STP)– CX3: Navisphere CLI archivedump NAR data
Non EMC Environments– Host Data Collections
Windows Perfmon HP/UX sar AIX iostat Linux iostat Solaris iostat iSeries WRKDSKSTS Mainframe SMF and CMF
Workload Generator (Simulated Data)
10© Copyright 2008 EMC Corporation. All rights reserved.
Sample Write Activity Workload
Writes Per Second
Look for and understand workload
peaks
11© Copyright 2008 EMC Corporation. All rights reserved.
Write Profile
12© Copyright 2008 EMC Corporation. All rights reserved.
Sample Multiple Storage Subsystem Model
13© Copyright 2008 EMC Corporation. All rights reserved.
Sample Uncompressed Mbytes per Second Throughput Requirements
14© Copyright 2008 EMC Corporation. All rights reserved.
IO Profile Charts
Looking for repetitive cycles
15© Copyright 2008 EMC Corporation. All rights reserved.
Sample Model Exceeding OC12 Bandwidth
16© Copyright 2008 EMC Corporation. All rights reserved.
Silver Peak FunctionalityA technology for improving network usage for all IP replication
• Network Memory works across all applications• Offloads CPU intensive processes from end stations• Byte level fingerprinting is more granular than block techniques• Bi-directional: Handles recovery as well as backup/replication• SECURITY, SECURITY, SECURITY
• Entire process handled with full encryption • Incorporates other WAN optimization techniques:
• Loss Mitigation, QoS/Traffic Management, Latency Mitigation
WAN Acceleration with Silver Peak
• Improve RTO/RPO• Avoid bandwidth costs• Real-time WAN performance• Centralize servers and storage
Business Benefits
Additional Info:EMC Select URL for Silver Peak: http://powerlink.emc.com/km/appmanager/km/secureDesktop?_nfpb=true&_pageLabel=query1&internalId=0b014066802f83b7&_irrt=true
• Transparently intercept traffic in real-time• Fingerprint at byte level; store on local disk • Deliver duplicate data from local instance• Data always encrypted
How Network Memory works:
Data center challenges
• Cannot meet RPO/RTO • Diverse application mix• Bandwidth (cost/availability)• Branch fan-in
17© Copyright 2008 EMC Corporation. All rights reserved.
F5 FunctionalityA technology for improving network usage for all IP replication
• Simple to use• Transparent – Non-invasive• SRDF Replication is unaware that TDR is being applied• Protocol agnostic• Applicable to any TCP protocol (e.g. SRDF,FTP, CIFS,etc)• File type agnostic
• Works for any file type (e.g. Powerpoint, PDF, CAD) including proprietary file types
• Data reduction even for compressed data• ZIP Archive, images etc.
• Dramatically higher bandwidth savings than traditional compression techniques
• No files are stored or cached on disk
WAN Acceleration with F5
• Reduced WAN costs / utilization• Improvement in RPO/RTO of SRDF• Reduced business risk of unmet
RPO/RTO’s
Business Benefits
Additional Info:EMC Select URL for F5: http://powerlink.emc.com/km/appmanager/km/secureDesktop?_nfpb=true&_pageLabel=query1&internalId=0b014066802b47a2&_irrt=true
• Decreased usage of bandwidth• Accelerated Replication processes• Prioritization of traffic• Big improvement over Symm compression• Decreased susceptibility to packet loss• Encryption of SRDF payloads with SSL
Technical Benefits
Data center challenges• Cannot meet RPO/RTO • Diverse application mix• Bandwidth (cost/availability) LAN A LAN B
SYN
ACK
SYN
ACKWANJet WANJet
18© Copyright 2008 EMC Corporation. All rights reserved.
What happens if someone turns off all What happens if someone turns off all the servers……… now?the servers……… now?
19© Copyright 2008 EMC Corporation. All rights reserved.
Application Consistency: The Problem
Systems share related information…
How do you get a consistent view of it all?
Without consistent database copies,
transactions must be recreated manually
Orders Shipments
CRM
Orders Shipments
Order/Ship
How do you discover the interrelationships?
20© Copyright 2008 EMC Corporation. All rights reserved.
Application Consistency: The Enterprise Solution
EMC Business Continuity products create point-in-time,
restartable copies for all affected databases,
ensuring enterprise-wide consistency across multiple databases,
applications, & platforms
UNIX
Mainframe
Windows
21© Copyright 2008 EMC Corporation. All rights reserved.
Local High Availability, Remote Disaster Recovery
Users
Load Balancers Cisco, F5 Big-IP, Foundry
Middleware (TP Monitor) Tuxedo, MQ Series, Citrix
Application Server Farm10g Services, Transparent Application Failover (TAF)
Database Oracle 10g, RAC
Storage Sync replication RecoverPoint, SRDF/A
Notes
Standby and used for testing. May be replicated, but must consider state vis a vis database.
Database M2Database M1
Site B DR
RPO 1 min
RTO 4hr
Active Active
Standby and used for testing.
SAN
BCV
Database R2
SAN
Site A Site B
Test & Dev, Backup,Reporting
NSPOF New zoneset for DNS, AD domain.
High Availability Disaster Recovery
Local & Remote Sites:
Assumes Production
Recommended