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These types of discussions should be taken up with IB technology / OEM
vendors directly as they have nothing to do with development.<br><br>
Mike<br><br>
<br>
At 06:28 AM 10/15/2005, Mohit Katiyar, Noida wrote:<br>
<blockquote type=cite class=cite cite="">Hi all,<br>
Sorry previous mail got scrapped due to HTML pictures so now with
text<br>
pictures<br>
I just cant clear a doubt about IB.<br>
In the first figure given below the max speed that can be obtained<br>
between the client and the IO storage is 2Gb/s<br><br>
Client --------|<br>
Client
--------|<x-tab> </x-tab>
<x-tab> </x-tab><x-tab>
</x-tab>|--- FC
Switch---|<br>
.<x-tab> </x-tab><x-tab>
</x-tab> |
<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab>|<x-tab>
</x-tab><x-tab>
</x-tab>
|<br>
.<x-tab> </x-tab><x-tab>
</x-tab>
|---FC
Cables--|<x-tab> </x-tab><x-tab>
</x-tab>
|-----I/O storage<br>
.<x-tab> </x-tab><x-tab>
</x-tab>
|<x-tab> </x-tab>Each
client<x-tab> </x-tab>|<x-tab>
</x-tab>
|<br>
Client
--------|<x-tab> </x-tab>
connected<x-tab> </x-tab>|--- FC
Switch---|<br>
<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab>To both
switch<br><br>
<br>
Figure 1<br><br>
<br><br>
While in the figure given below the client to IB FC gateway speed is
><br>
10 GB/s and from Gateway to I/O storage is 2GB/s and if port
aggregation<br>
is applied at gateway then 4GB/s. So the total effective speed from<br>
client to I/O storage can max be reached at 4GB/s<br><br>
<x-tab> </x-tab>
IB cables <br>
Client --------|<br>
Client
--------|<x-tab> </x-tab>
<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab>
|----- FC<br>
Switch---|<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab><x-tab>
</x-tab><x-tab>
</x-tab><x-tab>
</x-tab><br>
.<x-tab> </x-tab><x-tab>
</x-tab>
|<x-tab> </x-tab>IB cables
<x-tab> </x-tab><x-tab>
</x-tab>
|<br>
|<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab><x-tab>
</x-tab><br>
.<x-tab> </x-tab><x-tab>
</x-tab>
|------------IB FC ------
|<x-tab> </x-tab>
|---FC<br>
Cables------I/O storage<br>
.<x-tab> </x-tab><x-tab>
</x-tab>
|<x-tab> </x-tab><x-tab>
</x-tab>
Gateway/Router |<br>
|<x-tab> </x-tab><br>
Client
--------|<x-tab> </x-tab>
<x-tab> </x-tab><x-tab>
</x-tab><x-tab>
</x-tab>
|----- FC<br>
Switch---|<x-tab> </x-tab><br><br>
<br>
Figure 2<br><br>
<br><br>
So can anyone explain me am I correct in my approach? Are there any<br>
other advantages in shifting from figure 1 architecture to figure 2<br>
architecture?<br><br>
It does not seem any advantageous in shifting from FC SAN to IB FC
SAN<br>
through such a pattern?<br><br>
Can anyone help me in deciding about this??<br><br>
<br><br>
<br><br>
<br><br>
Thanks in advance<br><br>
<br><br>
Mohit Katiyar<br>
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