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Please find information below hope can clarify your concern:
1) There are no known issues using iWARP technology over WAN, but you must have both server and client running iWARP RDMA.
2) In order to use any form of RDMA (including iWARP), you must use an RDMA-enabled application and you must install and configure iWARP on the network.
If the application you are using is not RDMA-enabled, then you will not be able to use iWARP.
3) Since you are using the server for Web Server/ Application Server. iWARP support is not really relevant.
Thank you for the explanation.
I'll keep iWARP enabled then, although we currently can't really take advantage of it.
I'd like to add that the Ohio Supercomputer Center actually did research to using iWARP for web servers and created a module for Apache to add support for RDMA:
According to their research the main benefit for iWARP enabled web servers is the lower CPU usage, as well as slightly better latency and being able to handle more connections.
Perhaps we will see support for iWARP in popular web applications and web servers in the future, as iWARP becomes mainstream with current and next generation servers. However we also need clients/web browsers capable of using iWARP (in hardware or trough software emulation).
You are welcome and thank you for sharing the additional information, this will benefit others in case they need to use iWARP for their implementation.
Please let me know if you still have other inquiries. Thank you.