Comment by jandrewrogers

The key point is that they managed to do it with Accumulo; the insertion rate through storage is otherwise unremarkable. For 10 GbE clusters, line-rate insertion has been relatively easy to achieve for several years now.

An important point is that they disabled all of the durability, replication, and safety features. Graph500 records are quite small so that insertion rate given the size of their cluster implies average throughput that is significantly less than line-rate.