Hi Ian and welcome to the IB scene …
There are several things you should
consider when you choose the stack to work with:
Life
-----
- The IBGD is based on the VAPI driver (which won’t be
developed much in the future)
- The openIB is under development
Stability
-----------
- Both of the drivers are stable
Support
------------
- IBGD: Mellanox support will
answer to your questions
- openIB: all the opebIB members can help you and answer to your
questions
Debug features
---------------------
- the IBGD is more programmer friendly environment (the return value
help you understand exactly what the error was)
- not friendly at all: the return value in case of error will be -1
(most of the times) without any debug print or specific return value to
different errors
Supported HW
--------------------
- IBGD: Mellanox HCAs are being supported
- openIB : Mellanox /
IBM / PathScale HCAs
are being supported
Supported Linux kernels versions
------------------------------------------------
- IBGD support kernel 2.4.*, 2.6* (up to 2.6.11)
- openIB support the
latest kernel.org
Latency
-----------
- openIB based applications
can may better latency than IBGD based applicaitons
Few weeks ago, Mellanox published IBG2
(which is a stable version of the openIB driver)
Dotan
|
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