[openib-general] IB and FC

[Michael Krause]

These types of discussions should be taken up with IB technology / OEM 
vendors directly as they have nothing to do with development.

Mike


At 06:28 AM 10/15/2005, Mohit Katiyar, Noida wrote:
>Hi all,
>Sorry previous mail got scrapped due to HTML pictures so  now with text
>pictures
>I just cant clear a doubt about IB.
>In the first figure given below the max speed that can be obtained
>between the client and the IO storage is 2Gb/s
>
>Client --------|
>Client --------|                        |--- FC Switch---|
>   .                |                    |                    |
>   .                |---FC Cables--|                  |-----I/O storage
>   .                |    Each client     |                  |
>Client --------|        connected       |--- FC Switch---|
>                         To both switch
>
>
>                                        Figure 1
>
>
>
>While in the figure given below the client to IB FC gateway speed is >
>10 GB/s and from Gateway to I/O storage is 2GB/s and if port aggregation
>is applied at gateway then 4GB/s. So the total effective speed from
>client to I/O storage can max be reached at 4GB/s
>
>            IB cables
>Client --------|
>Client --------|                                     |----- FC
>Switch---|
>   .                |    IB cables                    |
>|
>   .                |------------IB FC ------ |              |---FC
>Cables------I/O storage
>   .                |              Gateway/Router |
>|
>Client --------|                                     |----- FC
>Switch---|
>
>
>                                                 Figure 2
>
>
>
>So can anyone explain me am I correct in my approach? Are there any
>other advantages in shifting from figure 1 architecture to figure 2
>architecture?
>
>It does not seem any advantageous in shifting from FC SAN to IB FC SAN
>through such a pattern?
>
>Can anyone help me in deciding about this??
>
>
>
>
>
>
>
>Thanks in advance
>
>
>
>Mohit Katiyar
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