1. Business Continuity Section 3(chapter 8) BC:ISMDR:BEIT:VIII:chap8:Madhu N PIIT1

2. - 2 Section Objective Upon completion of this section, you will be able to: Understand the concept of information availability and its measurement Describe the backup/recovery purposes and considerations Discuss architecture and different backup/recovery topologies Describe local replication technologies and their operation Describe remote replication technologies and their operation.

3. Introduction to Business Continuity Chapter 11 BC:ISMDR:BEIT:VIII:chap8:Madhu N PIIT3

4. - 4 Chapter Objective After completing this chapter, you will be able to: Define Business Continuity and Information Availability Detail impact of information unavailability Define BC measurement and terminologies Describe BC planning process Detail BC technology solutions

5. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 5 What is Business Continuity Business Continuity is preparing for, responding to, and recovering from an application outage that adversely affects business operations Business Continuity solutions address unavailability and degraded application performance BC is an integrated and enterprise wide process and set of activities to ensure “information availability”

6. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 6 What is Information Availability (IA) IA refers to the ability of an infrastructure to function according to business expectations during its specified time of operation IA can be defined in terms of three parameters: – Accessibility Information should be accessible at right place and to the right user – Reliability Information should be reliable and correct – Timeliness Information must be available whenever required

7. BC:ISMDR:BEIT:VIII:chap8:Madhu N PIIT - 7 Causes of Information Unavailability Disaster (<1% of Occurrences) Natural or man made Flood, fire, earthquake Contaminated building Unplanned Outages (20%) Failure Database corruption Component failure Human error Planned Outages (80%) Competing workloads Backup, reporting Data warehouse extracts Application and data restore

8. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 8 Impact of Downtime Lost Revenue Know the downtime costs (per hour, day, two days...) Number of employees impacted (x hours out * hourly rate) Damaged Reputation Customers Suppliers Financial markets Banks Business partners Financial Performance Revenue recognition Cash flow Lost discounts (A/P) Payment guarantees Credit rating Stock price Other Expenses Temporary employees, equipment rental, overtime costs, extra shipping costs, travel expenses... Direct loss Compensatory payments Lost future revenue Billing losses Investment losses Lost Productivity

9. BC:ISMDR:BEIT:VIII:chap8:Madhu N PIIT - 9 Measuring Information Availability MTBF: Average time available for a system or component to perform its normal operations between failures MTTR: Average time required to repair a failed component IA = MTBF / (MTBF + MTTR) or IA = uptime / (uptime + downtime) Detection Incident Time Detection elapsed time Diagnosis Response Time Repair Recovery Repair time Restoration Recovery Time MTTR – Time to repair or ‘downtime’ Incident MTBF – Time between failures or ‘uptime’

10. BC:ISMDR:BEIT:VIII:chap8:Madhu N PIIT - 10 Availability Measurement – Levels of ‘9s’ Availability % Uptime% DowntimeDowntime per YearDowntime per Week 98%2%7.3 days3hrs 22 min 99%1%3.65 days1 hr 41 min 99.8%0.2%17 hrs 31 min20 min 10 sec 99.9%0.1%8 hrs 45 min10 min 5 sec 99.99%0.01%52.5 min1 min 99.999%0.001%5.25 min6 sec 99.9999%0.0001%31.5 sec0.6 sec

11. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 11 BC Terminologies Disaster recovery – Coordinated process of restoring systems, data, and infrastructure required to support ongoing business operations in the event of a disaster – Restoring previous copy of data and applying logs to that copy to bring it to a known point of consistency – Generally implies use of backup technology Disaster restart – Process of restarting from disaster using mirrored consistent copies of data and applications – Generally implies use of replication technologies

12. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 12 BC Terminologies (Cont.) Recovery Point Objective (RPO) Point in time to which systems and data must be recovered after an outage Amount of data loss that a business can endure Recovery Time Objective (RTO) Time within which systems, applications, or functions must be recovered after an outage Amount of downtime that a business can endure and survive Recovery-point objectiveRecovery-time objective

13. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 13 Business Continuity Planning (BCP) Process Identifying the critical business functions Collecting data on various business processes within those functions Business Impact Analysis (BIA) – Risk Analysis Assessing, prioritizing, mitigating, and managing risk Designing and developing contingency plans and disaster recovery plan (DR Plan) Testing, training and maintenance

14. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 14 BC Technology Solutions Following are the solutions and supporting technologies that enable business continuity and uninterrupted data availability: – Single point of failure – Multi-pathing software – Backup and replication Backup recovery Local replication Remote replication

15. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 15 Resolving Single Points of Failure FC Switches Storage Array Redundant Network Clustered Servers Redundant Arrays Remote Site Redundant Ports Redundant FC Switches Redundant Paths Heartbeat Connection IP Storage Array Client

16. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 16 Multi-pathing Software Configuration of multiple paths increases data availability Even with multiple paths, if a path fails I/O will not reroute unless system recognizes that it has an alternate path Multi-pathing software helps to recognize and utilizes alternate I/O path to data Multi-pathing software also provide the load balancing Load balancing improves I/O performance and data path utilization

17. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 17 Backup and Replication Local Replication – Data from the production devices is copied to replica devices within the same array – The replicas can then be used for restore operations in the event of data corruption or other events Remote Replication – Data from the production devices is copied to replica devices on a remote array – In the event of a failure, applications can continue to run from the target device Backup/Restore – Backup to tape has been a predominant method to ensure business continuity – Frequency of backup is depend on RPO/RTO requirements

18. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 18 Chapter Summary Key points covered in this chapter: Importance of Business Continuity Types of outages and their impact to businesses Information availability measurements Definitions of disaster recovery and restart, RPO and RTO Business Continuity technology solutions overview

19. BC:ISMDR:BEIT:VIII:chap8:Mad hu N PIIT - 19 Concept in Practice – EMC PowerPath SERVER STORAGE SCSIDriverSCSIDriverSCSIDriverSCSIDriverSCSIDriverSCSIDriver SCSI Controller PowerPath  Host Based Software  Resides between application and SCSI device driver  Provides Intelligent I/O path management  Transparent to the application  Automatic detection and recovery from host-to-array path failures Host Application (s) LUN Storage Network