Title: OpenSM Work Q2 2005

Hi All,

For your comments and information Mellanox plans to work on the following new OpenSM feature and enhancements this quarter (and maybe next one):

    1.      PKey re-ordering - current implementation of PKey tables in OpenSM "re-orders" the PKeys. This breaks any installation that uses PKeys.

    2.      Routing algorithm time - 2minutes for 1K nodes. The solution is to implement a new "tree based" router that scales to 50K nodes fat tree and also implement "loading" of pre-routes.

            NOTE: I will send a mail describing the proposed algorithms and will highly appreciate any input regarding other alternatives and review of the provided Order of complexity.

    3.      SL2VL support by Path Record - current implementation ignores any SL2VL mapping. If one will configure those somehow, wrong path record results will break connectivity.

    4.      Default PKey values are not set - New hardware that does not have default known PKey (0xffff) will fail any communication as the SM is supposed to set that value for it.

5.      QoS - OpenSM does not implement any QoS policy. Seems like people are more interested in that too. The solution is to implement a simple uniform QoS based on SL2VL and VLArb.

Your comments and ideas are welcome.

Thanks

Eitan Zahavi

Design Technology Director

Mellanox Technologies LTD

Tel:+972-4-9097208
Fax:+972-4-9593245

P.O. Box 586 Yokneam 20692 ISRAEL

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