Storage Area Networks - PowerPoint PPT Presentation

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Storage Area Networks

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FC-AL and Switching Fabric (non-blocking) SMU. CSE 8344. FibreChannel ... 266 Mbps ten years ago. 1063 Mbps common in 1998. 2125 Mbps available today ... – PowerPoint PPT presentation

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Title: Storage Area Networks


1
Storage Area Networks
2
Whats SANs
3
SAN Solutions
  • Server consolidation
  • Storage consolidation
  • Port consolidation
  • Tape consolidation
  • Distance

4
SAN Hardware
5
Switches and Hubs
FC-AL and Switching Fabric (non-blocking)
6
FibreChannel
  • How SCSI Limitations are Addressed
  • Speed
  • Distance
  • Device Count
  • Access

7
FibreChannel Speed
  • 266 Mbps ten years ago
  • 1063 Mbps common in 1998
  • 2125 Mbps available today
  • 4 Gbps near future products
  • Backward compatible to 1 2 Gbps
  • 10 Gbps 2005?

8
I/O Protocols over IP
  • IP Networking is ubiquitous
  • Gigabit ethernet is here
  • 10Gbps ethernet is just becoming available
  • Dont have to invest in a second network
  • Just upgrade the one you have ?
  • IP Ethernet software is well understood
  • Existing talent pool for vendors to leverage
  • Developers, not end-user Network Engineers

9
FibreChannel Distance
  • 1063 Mbps
  • 175m (62.5 um multi-mode)
  • 500m (50.0 um multi-mode)
  • 10 km (9 um single-mode)
  • 2125 Mbps
  • 500m (50.0 um multi-mode)
  • 2 km (9 um single-mode)

10
FibreChannel - Topology
  • Point-to-Point
  • Direct Connection of Server and Storage Node
  • Arbitrated Loop
  • Up to 126 Devices in a Loop via NL_Ports
  • Token-access, Polled Environment (like FDDI)
  • Fabric
  • Arbitrary Topology
  • Requires At Least One Switch
  • Up to 15 million ports can be concurrently logged
    in with the 24-bit address ID.
  • Dedicated Circuits between Servers Storage
  • via Switches

11
Other Features/Issues
  • Backup
  • LAN-free, server-less
  • Replication
  • Synchronous/Asynchronous
  • Server Clustering
  • Volume and File Management
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