[Pvfs2-developers] tcp connections

[Murali Vilayannur]

Dharani,
It depends on whether the application is linked to the pvfs2 library
or if it makes use of the vfs/posix api/fopen.
In the case of the former, applications have to make use of ephemeral
ports on the client-machine. Thus they will end up using different
ports

In the case of the latter, it is the job of pvfs2-client-core daemon
to initiate connections with the servers and maintain the socket file
descriptors.
Thus, in this case, pvfs2-client can make do with just 1 socket to a
single server and thus use the same client-side port. The app never
talks directly to the servers. All communication is funneled through
the device to client-core.
Hope this helps,
Murali

On 4/23/07, Dharani Sankar Vijayakumar <vijayaku at cse.psu.edu> wrote:
> Suppose there are two applications running in a pvfs client node.
> Say one client does an "fopen" thus establishing a tcp/ip connection with
> the metadata server.
>
> Similarly the other application in the same client opens a connection
> with the meta data server. Does the second application use a different
> port number at the client than the first application? or the same port
> number is used by both applications?
>
>
>
> Regards,
> Dharani
>
>
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