Emerging Trends in Backup & Recovery South Texas ACP Chapter February 2005 Meeting

Transcription

1 Emerging Trends in Backup & Recovery South Texas ACP Chapter February 2005 Meeting February 8, 2005 Copyright 2004 Corig elan, LLC

2 Abstract The disciplines of High Availability and Disaster Recovery are typically found in separate IT organizations. High Availability or HA is traditionally in the IT Infrastructure Group while Disaster Recovery or DR is often part of the Business Continuity Group. Both disciplines deal with ensuring that an application is made available to the user community; HA for immediate fail-over typically without human response and DR for those cases where a site or regionally failure has occurred. Is it possible to combine the two strategies for continuity of operations? This session will examine real-life solutions where organizations have leveraged the two together to improve operational resiliency and improve the availability of an application while reducing cost. Copyright Notice: Permission is granted to copy and redistribute provided source of authorship is acknowledged. Page - 2

3 AGENDA 1. Downtime & Disasters a) A Historical Look 2. HA v DR 3. Solving for Different Types of Losses 4. Technology Recovery Solutions a) Turn Local Clusters Into Geo-Clusters b) Re-Leverage QA & R&D Assets for DR 5. Emerging Data Protection Options Page - 3

4 Downtime & Disasters A Historical Perspective Is It DR or HA? Page - 4

5 Leading Causes of Downtime 1998 Survey (prior to rise in HA practices) by Contingency Planning & Management magazine shows that preventable factors are the leading causes of failure. Note three leading causes: Power Failure Hardware Failure Telecom Failure Leading Causes of Downtime Problem Power Failure Hardware Failure Telecom Failure Software Human Error Frequency of Occurrence 72.2% 52.2% 46.0% 43.1% 34.4% Lightning 33.7% Page - 5

6 Leading Causes of Disaster Declaration Prior to 1999 & rise in HA practices over half of a declared disasters were HA related 51% of declarations were preventable : 22% Hardware Failure 17% Power Failure 4% Miscellaneous 3% Telecom Failure 2% HVAC 2% SW Failure 1% Data Center Move Comdisco Disaster Declaration Reasons (1998 & Prior) Problem Hardware Failure Hurricane Power Outage Flood Fire/Explosion Bomb Earthquake Miscellaneous (security, theft, etc.) Telecom Failure Environment (HVAC) Software Failure Data Center Move Tornado Frequency of Occurrence 22% 20% 17% 13% 6% 5% 4% 4% 3% 2% 2% 1% 1% Page - 6

7 High Availability v Disaster Recovery Conflicted Disciplines Page - 7

8 High Availability High Availability (HA) is concerned with providing near continuous service Field has introduced new evaluation terminology: 9 s of Availability (a measurement of uptime) N the need N+1 the need plus one spare 2N twice the need in parallel SPOF : Single Point Of Failure Focus is on eliminating equipment faults as a cause of downtime If you only meet the Need, you have a SPOF Page - 8

9 High Availability Continuous / Near Continuous Server Operation Provided by: 2N architecture; e.g. Tandem Stratus Others N+1 architecture; e.g. Clustering: MSCS Veritas Others SAN / Disk 2N: RAID-1, On Floor Mirror in a Separate Disk Array N+1: ~ RAID-2 thru 5 Standard in Power, Network, & HVAC is a 2N Architecture Page - 9

10 2N Power Infrastructure Generator Electric Company ATS ATS UPS UPS Breaker A Breaker B Breaker A Breaker B PDU A PDU B STS STS Server Generator Tier-3 Infrastructure, 2N redundant; completely parallel; No need to take down application for power maintenance Page - 10

11 Disaster Recovery / Business Continuity DR Measurements in Units of Downtime / Lost Data RTO RPO Traditionally measured in days or hours BC Concerned with Continuity of Operations Page - 11

12 Evolving Recovery Times By Tiers Tier Recovery Time Window Seconds/Minutes < 24 hours hours 72+ hours As Time & Resources Permits Critical Requirements Page - 12

13 Disaster Recovery / Business Continuity DR/BC has Traditionally Provided Coverage for Losses of Services DR Plan was not typically invoked unless the expected length of the outage was greater than the expected recovery time Although there are always Preventers/PreEmpters Evolving Focus to Provide Protection for Site & Region Losses Near 0 RTO & RPO is Driving BC into HA Territory Business Continuity is Blurring the Distinction of Responsibility with High Availability Practice Page - 13

14 Loss Strategies Where Does HA End & DR Start? Page - 14

15 Tiers of Losses Loss of Equipment Technology Failure Loss of Facility Facility is not accessible or usable Loss of the Region Wide spread outage Page - 15

16 Types of Losses; Frequency & Duration of Occurrence Disaster/Loss Type Loss of Equipment Loss of Facility & Equipment Loss of Region Facility Intact Loss of Region & Facility Relative Duration of Recovery Shortest Long Short to Medium Very Long Relative Frequency of Occurrence Frequent Occasionally Seldom Very Rare Page - 16

17 Rules of Thumb for Tiered Strategies 1.Invest the most in things that are more likely to occur 2.It will cost you more for things that last for longer durations 3.Try to develop Recovery Strategies that can be shared between outage types 4.Extend RTO for things that rarely occur 5.Extend RTO for things that also effect your customers/vendors 6.Have other contingencies for things that rarely occur Page - 17

18 The High Availability (HA) Discipline Addresses Preventable Outage Causes Disaster Recovery Has Evolved Into Providing Contingencies for Non- Preventable Causes Page - 18

19 Question: Can One Solution Solve for Both HA & DR? Page - 19

20 Technology Recovery Options Matrix Page - 20

21 Technology Recovery & Availability Options Matrix Data Recovery Techniques Partner Recovery e.g. GEIS Tape Electronic Data Vaulting HA Data Mirroring w/ Fail-over / Load Balancing Equipment Provisioning Quickship Hotsite Releveraged Test & Development Resources Dedicated Standby Hosting Options Mobile Hotsite Co-Location Internal Copyright 2004 Corig elan, LLC Higher ROs, Lower Cost Lower ROs, Higher Cost

22 Technology Recovery & Availability Options Recovery Strategy Techniques Partner Recovery e.g. GEIS Tape Electronic Data Vaulting HA Mirroring/ Fail-over/ Load Balancing Equipment Provisioning Quickship Hotsite Releveraged Resources Dedicated Standby Hosting Options Mobile Hotsite Co-Location Internal Copyright 2004 Corig elan, LLC

23 Technology Recovery & Availability Options Recovery Strategy Techniques Partner Recovery e.g. GEIS Tape Electronic Data Vaulting HA Data Mirroring w/ Fail-over / Load Balancing Equipment Provisioning Quickship Hotsite Releveraged Test & Development Resources Dedicated Standby Hosting Options Mobile Hotsite Co-Location Internal Copyright 2004 Corig elan, LLC

24 Always On Internet / Near Continuous Applications Internet Layer Presentation & Security Layer Application / DB Layer

25 Re-Leverage Equipment Develop an Internal Hotsite Pool by Reusing Development & Test Gear in a Disaster as Production Philosophy: The personality of a machine is determined by the OS, Applications, and Data it connects to You can implement this philosophy by: 1. Split Production from Development & QA 2. Employing Diskless Servers (Boot and Data) Variation Local JBOD for page & swap 3. Re-zoning/Connecting to Alternate Personality ATOD/ATOT Spread HA Equipment across sites Page - 25

26 1. Separate Production from Test & Development Primary Data Center Production 2nd Data Center Development & QA Tape Library Tape Silo LAN/WAN User Community

27 2. Adopt Diskless Server Technology Primary Data Center Production 2nd Data Center Development & QA Tape Library Tape Silo LAN/WAN User Community

28 3. Replicate / Mirror the Production Data to the 2 nd Data Center 4. Perform Cross Backups of Each Data Center Production Development & QA Replication WAN Production Data Storage Extender Storage Extender Tape Library Production Repl. & Backups Backups of Development Tape Silo LAN/WAN User Community

29 5. ATOD Disconnect Development Servers From Development OS & Data 6. ATOD Rezone SAN and Connect to Production OS & Data 7. Boot-up in Production Production Development Production & QA Replication WAN Production Data Storage Extender Storage Extender ATOD Tape Library Tape Silo LAN/WAN User Community

30 Emerging Data Protection Mechanisms It s Not Your Father s Oldsmobile Backup Anymore Page - 30

31 Emerging Data Protection Mechanisms Classes: Data Backup Data Vaulting : Replication / Mirroring Emerging Tape / Backup Solutions VTL Virtual Tape Libraries D2D2T Disk To Disk To Tape Shorter Backup Window Page - 31

32 Major VTL Vendors Page - 32

33 Evolution of Backup Technology Full-Backup Complete Quick Restore Too long to backup Incremental Complete when coupled with Full Quick Backup May Have Long Restore Differential / Cumulative Complete when coupled with Full Relatively Quick Backup Relatively Quick Restore Synthetic Simulated Full-Backup Incremental Data Provided by Server Untouched Full Data Provided by D2D2T/VTL Store Quick Restore, Longer Offline Backup Page - 33

34 Do You Backup for: Backup Speed or Restore Speed Page - 34

35 Major Backup Vendors Enterprise Solutions EMC/Legato NetWorker IBM Tivoli Storage Manager Veritas NetBackup Mid-Tier / Work Group Solutions Atempo Time Navigator Bakbone NetVault Computer Associates BrightStor/ArcServe Commvault Galaxy HP Omniback SyncSort Backup Express Veritas Backup Exec Page - 35

36 Backup Helper Technologies Point-In-Time Copies Typically a hardware based copy (pseudo-copy) of a data volume Allows for: Offline Backups DR / Development Testing SnapShot Based Replication Representative Solutions Clariion SnapView EMC TimeFinder; BCV (Business Continuance Volumes) HDS ShadowImage FalconStor Snapshot IBM Flashcopy NetApp SnapShot Veritas FlashSnap (Software Based) Page - 36

37 Data Replication / Mirroring Technologies Classes & Representative Samples: Host Based: Volume / LUN Veritas Volume Replicator File System NSI DoubleTake, Veritas Replication Exec Database MS-SQL, Oracle, Appliance Based FalconStor FileSafe/DiskSafe Replicator DataCore SANsymphony EMC Storage Router (FUT) Disk Array Based EMC SRDF EMC MirrorView/S & A HDS TruCopy Network Appliance SnapMirror Page - 37

38 Backup / Replication Resources STORAGE Magazine W. Curtis Preston UNIX Backup & Restore SearchStorage Conferences Conferences: SearchStorage ComputerWorld / SNIA Page - 38

39 Extended DRJ Spring 2005 Page - 39

40 Some Fun... Page - 40

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42 Questions Page - 42