Switched Storage Architecture Benefits

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# Switched Storage Architecture Benefits - PowerPoint PPT Presentation

Switched Storage Architecture Benefits. Computer Measurements Group November 14 th , 2002 Yves Coderre. Evolution of Technology. Disk Technology. Disk Technology. RAID Technology. 1990 5.25 ” 1GB 3600 RPM 1992 5.25 ” 3-9GB 5400 RPM 1996 Various 18-36GB 7200 RPM

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Switched Storage Architecture Benefits

Computer Measurements Group

November 14th, 2002

Yves Coderre

RAID Technology
• 1990 5.25” 1GB 3600 RPM
• 1992 5.25” 3-9GB 5400 RPM
• 1996 Various 18-36GB 7200 RPM
• 1998 Various 72GB 10K RPM
• 2000 Various 180GB 15K RPM
IOPS Measurements
• Rotational Speed
• Seek and Latency
• Linear and Spatial density
• RAID Protection
• Cache Hits
Theoretical Calculation
• Theoretical IOPS of a Spindle
• IOPS = 1000/(Average Seek + Latency)
• Average Seek = (Ws + Rs)/2
• Latency (ms) = (1000/RPS)/2
• Computes to 2.99ms for 10,025 RPM Drives
• Computes to 2.00ms for 15,00 RPM Drives
• Ex: 1000/(5.7ms + 2.99) = 115 IOPS
Practical Calculation
• Accounting for R/W Ratio & Read Hits

Taking into account the # of Spindles/Raid Group, the

Raid Penalty and type of workload, one can easily

Calculate the #of Spindles required to process a given

Number of IOPS for a given workload type.

Sample Calculation

10,000 IOPS,3/1 R/W Ratio @ 70% Read Hits,

100% Spindle Busy

10K RPM Drives (Rd Seek 5.2ms, Wr Seek 6.0ms)

• RAID 5 (3+1): 16 Array Groups (64 Drives)
• RAID 1(2+2): 13 Array Groups (52 Drives)
Sample Calculation

10,000 IOPS,3/1 R/W Ratio @ 70% Read Hits,

100% Spindle Busy

10K RPM Drives (Rd Seek 5.2ms, Wr Seek 6.0ms)

• RAID 5 (3+1): 16 Array Groups (64 Drives)
• RAID 1 (2+2): 13 Array Groups (52 Drives)

15K RPM Drives (Rd Seek 3.9ms, Wr Seek 4.5ms)

• RAID 5 (3+1): 11 Array Groups (44 Drives)
• RAID 1(2+2): 10 Array Groups (40 Drives)
Channel Technology
• 1990 Block Mux 3-4.5 MB/Sec
• 1993 ESCON 17 MB/Sec
Channel Technology
• 1990 Block Mux 3-4.5 MB/Sec
• 1993 ESCON 17 MB/Sec
• 1996 Fibre Channel 100 MB/Sec
• 1998 Fibre Channel 200 MB/Sec
Channel Technology
• 1990 Block Mux 3-4.5 MB/Sec
• 1993 ESCON 17 MB/Sec
• 1996 Fibre Channel 100 MB/Sec
• 1998 Fibre Channel 200 MB/Sec
• 2000 FICON 100 MB/Sec
• 2002 FICON 200 MB/Sec
ChannelConnectivity
• 1990 16 BMUX 72 MB/Sec
• 1993 16 ESCON 272 MB/Sec
ChannelConnectivity
• 1990 16 BMUX 72 MB/Sec
• 1993 16 ESCON 272 MB/Sec
• 1995 32 ESCON 544 MB/Sec
• 1996 32 Fibre 3.2 GB/Sec
ChannelConnectivity
• 1990 16 BMUX 72 MB/Sec
• 1993 16 ESCON 272 MB/Sec
• 1995 32 ESCON 544 MB/Sec
• 1996 32 Fibre 3.2 GB/Sec
• 2000 32 FICON 3.2 GB/Sec
• 2002 64 FICON 6.4 GB/Sec
Disk Subsystems
• 1990 3880, 3990 with Attached Disk
• 1991 ICDA Technology 4GB-32GB
Disk Subsystems
• 1990 3880, 3990 with Attached Disk
• 1991 ICDA Technology 4GB-32GB
• 1993 ICDA 512GB
• 1995 ICDA 1TB
Disk Subsystems
• 1990 3880, 3990 with Attached Disk
• 1991 ICDA Technology 4GB-32GB
• 1993 ICDA 512GB
• 1995 ICDA 1TB
• 1997 RAID Subsystems 5TB
• 2000 RAID Subsystems 75TB
IO Intensity Factors
• Disk Technology
• 5 MB to 180 GB Capacity
• 3600 to 15,000 RPM
• RAID Technology
• 5.25” to 3.5” to 1” (1GB to 180GB)
IO Intensity Factors
• Disk Technology
• 5 MB to 180 GB Capacity
• 3600 to 15,000 RPM
• RAID Technology
• 5.25” to 3.5” to 1” (1GB to 180GB)
• Channel Bandwidth & Connectivity
• 3.5 MB/Sec to 200MB/Sec, 64 Ports
• Disk Subsystems evolution
• 1 GB to 100 TB High Performance Subsystem
Growth Trends

Demand for bandwidth is growing faster than capacity requirements

“(…) the most innovative technology), which built a SAN rather than a backbone bus into its Storage Sub-Systems to deliver exceptional performance and capacity flexibility.”

“The company’s new Switch Architecture further demonstrated their commitment to technological innovation and business-enabling solutions, and redefines the industry standard, once again.”

Bob Zimmerman , Giga Group

Jack Scott, Evaluator Group, Inc.

Switch Architecture 2000
Switched Fabric Architecture

3.2GB/s

Data

3.2GB/s

Control

100 Mhz x 2 Bytes = 200MB/Sec

200MB/Sec x 16 Paths =3.2GB/Sec

32 Hosts Connections: FC, Escon, FICON, iSCSI, NAS

Switch Architecture

Control

Data Bandwidth

5 GB/s

Bandwidth

166 Mhz x 2 Bytes = 332MB/Sec

332MB/S x 32 Paths =10.6GB/Sec

64GB

Cache

Shared Memory - HSN

1) 4 paths / (CHA/DKA)

2) 32 paths / SM(Each side)

Frequency : 166MHz

Cache-HSN

1) 2 paths / (CHA/DKA)

2) 8 paths /(CSW for CHA/DKA)

3) 8 paths / (CSW for Cache)

4) 8 paths / (Cache)

5) 32 paths / DKC(CSW-Cache)

6) 16 paths / Cluster(CSW-Cache)

7) 32 paths / DKC (CHA/DKA-CSW)

8) 16 paths / Cluster (CHA/DKA-CSW)

Frequency : 166MHz

32 Cache

Connections

Up to 32 FC-AL backend paths

Tangible Benefits
• Reduced Total Cost of Ownership
• Enables Massive Consolidation & Centralization
• Reduced complexity by simplifying storage networking environments with fewer switches, connections
• Simplified management
• Simplified and automated tools reduces time spend managing storage: people can be re-deployed for other tasks.
• Reduced software licensing and maintenance
• Through improved capacity utilization: less capacity then lower licensing and maintenance
• One 6TB versus three 4TB
• \$700K plus
• Improved Environmental Costs
• Reduced floor space, power, cooling

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CIM/WBEM

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Network Management Requires Open Standards-Based Approach
• Exchanging APIs leads to a growing web of proprietary interfaces
• Storage networks require an object-based Common Information Model (CIM), for management of mixed environments
• Web-Based Enterprise Management(WBEM), provides a standard managementinterface for existing Web servers
• CIM/WBEM is an industry accepted specification that provides a truly open and adaptive standard for heterogeneous storage management
• Software vendors write to an open interface
• No need for proprietary commitments
• Hardware vendors provide a common object- based management interface that still enables them to provide differentiation

CIM

The Importance of a Message Bus

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CIM/WBEM

• A CIM object enables ISVs to codeto a common interface
• However, ISVs still need to communicate with each otherto reduce management complexity
• A Simple Object Access Protocol (SOAP) message bus provides a standard interface for communication between ISV products
• New Application Framework should be based on a CIM/SOAP management message bus.

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Management Message Bus: CIM/SOAP

CIM/WBEM

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High Performance, Open Computing

Computer Measurements Group

Thank You

Yves Coderre