> I know that 10GBase-T has more delay then SFP+ with direct attached > cables (.3 usec vs 2.6 usec per link), but does that matter? Some > sites stay it is a huge hit, but we are talking usec, not ms, so I > find it hard to believe that it causes that much of an issue. I like > the lower cost and use of standard cabling vs SFP+, but I don't want > to sacrifice on performance.
If you are talking about the links from the nodes with OSDs to their ToR switches then I would suggest going with Twinax cables. Twinax doesn't go very far but it's really durable and uses less power than 10GBase-T. Here's a blog post that goes into more detail: http://etherealmind.com/difference-twinax-category-6-10-gigabit-ethernet/ I would probably go with the Arista 7050-S over the 7050-T and use twinax for ToR to OSD node links and SFP+SR uplinks to spine switches if you need longer runs. -- Kyle _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
