Multipath and nbd

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I am at the design stage for a new server. That's when you try to convince a client that they have an unfavorable ratio of requirements to budget. I am thinking a raid-1, with a mirror to an nbd device running write-mostly. I will have redundant network paths to the other machine, one via a dedicated cable and P-t-P connection, and the other via a switch going to the general internal network.

Am I going into deep waters to try and do something helpful with multipath features here, or should I stick to a network only solution, and give the switched route a higher metric to force traffic through the dedicated link?

--
bill davidsen <davidsen@xxxxxxx>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979

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