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Copyright ©2003 Digitask Consultants Inc., All rights reserved
Storage Area Networks Digitask Seminar April 2000
Digitask Consultants, Inc. Digitask@digitask.com
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Storage Area Networks (SAN’s)
• What Is A SAN ?
• What Is The Justification ?
• Why Is Fiber Recommended ?
• Why Is It Needed ?
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Storage Area Networks (SAN’s)
W AN
Data
Data Data
Data
SAN
GB-TBGB-TB
Storage Arrays
TownLANServers
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Storage Area Networks (SAN’s)
• SAN Consists Of Connections, Hardware & Software.
• Dedicated Entirely To Storage.
• Uses Fast Fibre Interconnect Technology.
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Storage Area Networks (SAN’s)
• Obvious Dramatically Better Results In Data Sharing, Consolidation, Accessibility Management, & Security Of Enterprise Resources.
• SANS Give Better Than 20% Average Increase In Storage Utilization Rate.
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Storage Area Networks (SAN’s)
• SANs Can Allow For A Better Than 50% Reduction In Tape Utilization.
• SAN’s Allow For A Major Increase In Storage Productivity.
• SAN’s Give Better Access To Remote Mirrors & On-line Backups.
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Storage Area Networks (SAN’s)
Storage Area Network’s
LINUXLINUX
Tru64Tru64
OVMSOVMS
FibreChannelSw itch
Storage ArrayW ith
Dual HSG80's w256 MB Cache
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SAN Concepts Storage Array
D isk D rive (9 ,16 ,36,72 G B)
Shelf Power Supp ly
D isk C ontro lle rs (H SG 80's)
o 64 - 512 M B o f C ache
o Supports 72 U ltra SC S ID isks
o 36,000 I/O 's Per Second
o F ibre C hannel R uns 200M B Per Second O n
H SG 80 Pair, eg H SG 82
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Storage Area Networks (SAN’s)
• Data Replication Manager (DRM)Allows Real-time Copy Of Data On-line To
Local Or Remote LocationsData Replication Performed At Controller
Subsystem Level Without Affecting Host Activity.
DRM Works On Fibre Channel RA8000 and ESA12000.
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Storage Area Networks (SAN’s)
• Using Data Replication Manager When The Cost Of Unavailable Systems & Data
Loss Over Shadows The Cost Of Duplication Of Systems.
A Need To Recover From An Outage In A Very Short Time Exists.
Business Continuation Necessity.Estimate Downtime Costs Between $15K To
$6.5M Per Hour !
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Storage Area Networks (SAN’s)
Copyright ©2003 Digitask Consultants Inc., All rights reserved
Now, let’s talk about...
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Availability Classification
Availability Classification
Uptime Levels (%)
Uptime Levels (%)
Fault TolerantFault Tolerant 99.999999.9999 < 1 minute< 1 minute
Extremely High AvailabilityExtremely High Availability 99.999 99.999 5 minutes5 minutes
Fault Resilient ClustersFault Resilient Clusters 99.9999.99 53 minutes 53 minutes with Failoverwith Failover
High AvailabilityHigh Availability 99.999.9 8.8 hours8.8 hours
Commercial AvailabilityCommercial Availability 99.599.5 43.8 hours43.8 hours
Annual Downtime
Annual Downtime
How much availability do you really need?
Sources: Gartner Group, Transaction Processing Performance Council, Compaq
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Source: Gartner Group and Contingency Planning ResearchSource: Gartner Group and Contingency Planning Research
FinancialFinancial Brokerage operationsBrokerage operations ??????????????$ 6,500,000$ 6,500,000
Average Cost per Hour of DowntimeAverage Cost per Hour of Downtime
IndustryIndustry ApplicationApplication
FinancialFinancial Credit Card SalesCredit Card Sales ??????????????
MediaMedia Pay Per ViewPay Per View ??????????????
RetailRetail Home Shopping (TV)Home Shopping (TV) ??????????????
RetailRetail Catalog SalesCatalog Sales ??????????????
TransportationTransportation Airline ReservationsAirline Reservations ??????????????
$ 2,600,000$ 2,600,000
$ 90,000$ 90,000
$ 150,000$ 150,000
$ 113,000$ 113,000
$ 89,500$ 89,500
Cost of Downtime
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Backup Issues Backup becomes difficult because
Storage capacities are increasing faster than customers have planned.
On-line applications require no “unavailability” time due to 24x7 operations
Product costs are far less than management costs and “unavailability” costs
Performance is hard to model because components work serially and the solution is only as good as the slowest component
Customers realize their “true risks & costs” only when a restoration is needed
No tape standards exist and there is no single ISV that supports all operating systems
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Network BackupNetwork Backup Direct BackupDirect Backup
Drive or LibraryDrive or Library Many Drives or LibrariesMany Drives or Libraries
Traditional Backup Methods
Benefits:• Minimal Hardware/software • Centralized Administration • Broad Connectivity
Drawbacks:• Network can be very slow
Benefits:• High Performance Rates
Drawbacks:• Maximum Hardware/software • No Centralized Administration • No Broad Connectivity
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Puts Tape storage on a high-speed, independent Fibre Channel (100MB/sec) dedicated data backbone
Leverages current high performance DLT and Library technology including scalable Compaq DLT Mini-Library model
Provides a centralized, automated backup solution for multiple servers
Offers greater performance with less hardware than traditional LAN-based data management
Eliminates data traffic associated with a network backup Functions with standard backup software if needed
Digitask’sAlternativeEnterprise Backup Solution - Fibre Channel
Backup & Restore
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Storage Area Networks (SAN’s)
• Data Replication Manager (DRM) FeaturesNo Single Point Of Failure (NSPOF).Host Independent Copy Operation.Data Protection Over 10KM to 40KM.Fibre Channel Data Xfers At 100MB/sec.Supports RAID Configurations (0,1,0+1,3/5).Bi-directional Remote Copy.
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Storage Area Networks (DRM)
FibreChannelSw itch
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Multi-Site SAN With EBS & DRM
StorageW orksCommand Console
StorageW orksC om m and C onsole
TL895DLT Library
FibreChannel
TapeController
Fibre Channel StorageArray ESA12000
Fibre Channel Switches
ProductionSite A
ProductionSite B
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SANworks Strategy• Open SAN accessibility• Storage virtualization
– Enable flexible storage pooling for unprecedented scalability, granularity, availability, and serviceability
• Data protection and replication for fast recovery– Replace traditional backups with virtual snapshots and
physical clones that can be recovered quickly– Make distance transparent to remote replication
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Enterprise Backup & Virtual Replicator (WNT & Win 2000)
Ethernet
V irtualD isk
V irtualD isk
D isks A ppear A s Loca lD rives
Snap Shots To Tape
Pool
Pool
Pool
GB-TBGB-TB
Automated Tape Array
F
Fibre Channel FabricSw itch
Storage Pools
VirtualD isk
DiskBlock
Mapping
VirtualDisks
Fibre Channel tapeController II
W NT ClusterW NT Server
W NT Server
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Next Step in the ENSA Evolution: Next Step in the ENSA Evolution: Open SANsOpen SANs
Homogeneous Homogeneous SANsSANs
Shipping TodayShipping Today
The Next StepThe Next StepHeterogeneous Heterogeneous SANsSANs
Open SANsOpen SANs
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Cluster Storage Server(Network Attached Storage)
Ethernet
Hub
M em ory C hannel H ub
A lpha ServerA lpha Server
Enterprise S torage A rray
Minicom puter
Com puter
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Wide Area Cluster Concepts
• Definition of Wide Area Cluster (WAC)
> Some Nodes Separated from Others
> Implies Separate Computer Facility
> Distance Varies
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Types Of WAC
• Remote Cluster Node• Multi-site Cluster• Disaster Tolerant Cluster
> Duplication Of Hardware
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Wide Area Cluster
ALPRD3(A lpha 4100)
sys.disk
datadisk
datadisk
ALPRD1(A lpha 4100)
ALPRD2(A lpha 4100)
D isk ControllersD isk Drives
Robotic TapeBackup
Subsystem(3 TZ89Tapes)
M ultip le ConnectionsBetween Controllers &
Star Couplers
E thernet
N ew York C ity F inancia lD istrict
Ethernet
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WAC Shadow Data Move
ALPRD3(Alpha 4100)
ALPRD1(Alpha 4100)
ALPRD2(Alpha 4100)
RoboticTape
BackupSubsyst
em(3 TZ89Tapes)
Multiple ConnectionsBetween Controllers &
Star Couplers
Ethernet
N ew York C ity F inancia lD istric t
Ethernet
Data Data DataShadSet
ShadVol
Data DataData
Data Data DataShadVol
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Questions ?????
• Digitask Consultants• 212-682-6652/WWW.DIGITASK.COM