Dell PS4100 Technical Information download pdf (Page 5)

June 2012 Dell EqualLogic Configuration Guide v13.2 iv

3.8.2

Replication Paths ............................................................................................................................. 29

3.8.3 Replication Process ......................................................................................................................... 29

3.8.4 Fast failback ...................................................................................................................................... 32

3.8.5 Sizing Replica Reserve and Delegated Space ............................................................................. 32

3.8.6 Effect of TCP Window Size on Latency across WAN links ....................................................... 34

3.8.7 Replication Partner Compatibility................................................................................................. 34

3.9 Clustering .................................................................................................................................................. 35

4 EqualLogic SAN Design .................................................................................................................................. 36

4.1 Implementation of Standards ................................................................................................................ 36

4.2 General Requirements and Recommendations ................................................................................ 36

4.2.1 Quality of Service (QoS) ................................................................................................................. 38

4.3 Ethernet Switches and Infrastructure .................................................................................................. 38

4.3.1 Connecting SAN Switches in a Layer 2 Network ....................................................................... 39

4.3.2 Sizing Inter-Switch Connections .................................................................................................. 42

4.3.3 Comparing Inter-Switch Connection Types .............................................................................. 42

4.4 Block I/O Host Configuration Guidelines ........................................................................................... 43

4.4.1 Design guidelines for host connectivity in a redundant SAN .................................................. 44

4.4.2 Multi-Path I/O .................................................................................................................................. 45

4.5 EqualLogic iSCSI SAN Design ................................................................................................................ 46

4.5.1 Redundant SAN Configuration ...................................................................................................... 47

4.5.2 Partially Redundant SAN Configurations ..................................................................................... 48

4.5.3 Minimum Cabling Scenarios: PS4100 and PS6100 ................................................................... 50

4.6 Integrating 1GbE and 10GbE SANs ....................................................................................................... 52

4.6.1 Design considerations .................................................................................................................... 53

4.6.2 Mixed SAN best practices ............................................................................................................... 55

4.7 Blade Server Chassis Integration .......................................................................................................... 55

4.7.1 Designing a SAN using Blade Chassis IO Modules with Directly-Attached Arrays .............. 57

4.7.2 Designing a SAN using Blade Chassis IO Modules as Host Access to External Switches for

Array Connection ............................................................................................................................................ 65

4.7.3 M-Series Pass-Through Modules ................................................................................................. 70

5 FS Series NAS Appliance .................................................................................................................................. 71

5.1 FS Series Architecture .............................................................................................................................. 71

5.1.1 FS Series solution for file only storage......................................................................................... 72

5.2 Dell FluidFS ............................................................................................................................................... 73

5.3 FS Series Models ...................................................................................................................................... 74

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Dell PS4100 Technical Information Page 5

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