Monday, May 16, 2011

SAN Design – Recommended ISL ratios

The number of ISLs between edge and core switches characterizes the core-edge fabric types. The first number indicates the number of edge ports. The second number indicates the number of ISLs used by the edge ports to connect to a core switch in the fabric.

Recommended core-edge fabric ISL ratios
I/O workload Recommended ratios
Higher I/O data intensive application requirements (> 70 MB/s at 2 Gb/s, > 140 1:1 to 3:1 MB/s at 4 Gb/s, > 280 MB/s at 8 Gb/s)
1:1 to 3:1
Lower I/O data intensive application requirements (< 70 MB/s at 2 Gb/s, < 140 7:1 to 15:1 MB/s at 4 Gb/s, < 280 MB/s at 8 Gb/s)
7:1 to 15:1

7:1 for typical distributed data access is recommended.

The Source is here.

No comments:

Post a Comment