Transcript THE EMC EFFECT/Template

THE EMC EFFECT
Building the ESN
Infrastructure
EMC Enterprise Storage Network
Doing business without barriers
Page.1
THE EMC EFFECT
Agenda
 Fibre Channel Basics
 Enterprise Storage Network (ESN)
Introduction
 ESN Connectivity
— Direct Connect
— FC-AL Hubs
— Connectrix Fibre Channel Director
 ESN Access Control
— Zoning
— Volume Logix
 Case Studies
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THE EMC EFFECT
Fibre Channel Characteristics
 High speed serial data transfer
 Unaware of content of information
being transferred
 Simultaneously supports multiple
protocols
 Potential connectivity of millions of
devices
 Increases distance between devices
 Network that performs channel
operations
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THE EMC EFFECT
Fibre Channel
Fibre Channel
Channels
Static
Configuration
High
Performance
Networks
Dynamic
Configuration
Low
Performance
Multi-system
Connectivity
Short
Distance
Low Protocol
Overhead
Single System
Connectivity
Extended
Distance
High Protocol
Overhead
Network that performs channel operations!
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THE EMC EFFECT
Fibre Channel Architecture
 A layered protocol
stack similar to
OSI
FC4
 FC0-FC2 provide
FC3
SCSI
HIPPI
ESCON
IP
ATM
COMMON SERVICES
transport services
 FC3 not currently
implemented
 FC-4 provides
encapsulation of
other protocols
FC2
FC1
FC0
FRAMING/FLOW CONTROL
ENCODE/DECODE
25
50
100
Future
12.5
MB/sec MB/sec MB/sec MB/sec Higher Rates
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THE EMC EFFECT
ANSI Fibre Channel Standards
 Protocol Mappings (FC-4)
—SCSI FCP Fibre Channel Protocol for SCSI-3
 Physical Signaling (FC-0, FC-1, FC-2)
—FC-PH Fibre Channel Physical and Signaling
—FC-PH-2 Fibre Channel 2nd Generation Physical and
Signaling
—FC-PH-3 Fibre Channel 3rd Generation Physical and
Signaling
 Topologies and Services
—FC-FG Fibre Channel Fabric Generic
—FC-AL Fibre Channel Arbitrated Loop
—FC-AL-2 Fibre Channel 2nd Generation Arbitrated Loop
—FC-SW Fibre Channel Switched Fabric
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THE EMC EFFECT
Fibre Channel Classes of
Service
 Class 1 - dedicated connection, flow
controlled, acknowledged
 Class 2 - connectionless, multiplexed, flow
controlled, acknowledged
 Class 3 - connectionless, multiplexed, flow
controlled, datagram
 Class F - inter-switch communications
 Class 4 - fractional bandwidth, quality of
service, virtual channels
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THE EMC EFFECT
Fibre Channel Topology Terms

Node - An end point in the network

Link - A connection between two nodes

Fabric - Multiple Fibre Channel switches interconnected and
using Fibre Channel methodology for linking nodes and routing
frames n a Fibre Channel network

N_Port - Node port, a port at the end of a point-to-point link.

NL_Port - A port which supports the arbitrated loop topology

F_Port - Fabric port, the access point of the fabric which
connects to a N_Port

FL_Port - A fabric port which connects to a NL_Port

E_Port - Expansion port on a switch. Links multiple switches.

G_Port - A port on a switch with the ability to function as either a
F_Port or a E_port.

GL_Port - A port on a switch with the ability to function as either
a FL_Port or a E_Port.

HBA - Host Bus Adapter, the interface between the server bus
and storage network.
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THE EMC EFFECT
Fibre Channel Topologies
 Point-to-Point - Dedicated
link between two ports.
 Fibre Channel Arbitrated
Loop (FC-AL) - Shared
interconnect between 2 to
126 nodes.
 Fibre Channel Switched
Fabric
(FC-SW) Dynamic connectivity
between greater than 16
million nodes.
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THE EMC EFFECT
Point-To-Point
N_Po
rt
N_Po
rt
 Dedicated full bandwidth connection two
nodes
 No special protocol required to gain
access to the link
 Basic fabric connection type
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THE EMC EFFECT
FC-AL Hub
 Physical star,
Logical loop (FCAL)
NL_Po
rt
 2 to 126 nodes
per loop
 Nodes arbitrate
for control of the
loop
FC Hub
NL_Po
rt
 One full
bandwidth circuit
open at a time
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THE EMC EFFECT
Switched Fabric (FC-SW)
 Point-to-point
connection between
each node and the
switch
N_Po
rt
 N x 100 MB/sec
scaled bandwidth
F_Po
rt
 N/2 simultaneous full
bandwidth circuits
FC Switch
 Greater than 16
million nodes per
fabric
 EMC Connectrix!
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THE EMC EFFECT
Fabric Services
Switch
Host
Symmetrix
Fabric
Controller
SCSI-3
FCP
FA
Login
Server
SNS
SCSI-3
FCP
FCP
Fabric Login (FLOGI)
Fabric Login (FLOGI)
Port Login (PLOGI)

Simple Name Service (SNS) login supported by switch

Buffer-to-buffer flow control between nodes and switch

Fabric Controller routes frames between nodes

Class 3 implemented today
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THE EMC EFFECT
Fabric Zoning
 Creates logical
subsets of devices
Zone 1
 Devices can only
“talk” to devices in
the same zone
 Increases control of
the fabric
Zone 2
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THE EMC EFFECT
Switch versus Hub
Comparison
SWITCHES
•
FC-SW Architecture scaleable to
millions of connections.
•
•
•
HUBS
•
Bandwidth per device stays
constant with increased
connectivity.
FC-AL is limited to 127 devices.
(substantially fewer connections
can be implemented for ideal
system performance).
•
Bandwidth is scaleable relative to
connections.
Bandwidth per device diminishes
with increased connectivity.
•
Switch software includes robust
capabilities for managing a
topology.
Aggregate bandwidth is NOT
scaleable relative to connections.
•
Limited software management
functionality.
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THE EMC EFFECT
Data Flow Comparison
Hub (loop) - Nodes arbitrate for
shared bandwidth.
Switch (fabric) - Full bandwidth on each link.
Page.16
THE EMC EFFECT
Supported Media Types
Media
Distance
Copper (Twinax)
30 Meters
Multimode Fiber, 62.5 Micron
175 Meters
Multimode Fiber, 50 Micron
500 Meters
Singlemode Fiber, 9 Micron
10 Kilometers
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THE EMC EFFECT
Connectivity Evolution
REMOTE
CAMPUS
FC-SW
FC-AL
DATA
CENTER
HUB
FC-AL
SCSI
ESCON / BUS &
TAG
1990
25M
FC-AL
(Direct
Connect)
SWITCH
1 -- 11
KM
FC-SW
500M
1994
1997
1998
1999
SYMMETRIX
Page.18