> Now that these issues are gone, by having reasonable default settings for write concern and journaling, how well does MongoDB do in the benchmarks today? Rep

> Now that these issues are gone, by having reasonable default settings for write concern and journaling, how well does MongoDB do in the benchmarks today? Reports differ by benchmark, but the answer can be summarized as "not well". From [1] above: > MongoDB is now a lot slower compared to v2.0. On the industry-standard YCSB benchmark, MongoDB used to be competitive with Cassandra, as seen in the performance measurements we did when benchmarking HyperDex. Ever since the change, MongoDB can no longer finish the entire benchmark suite in the time allotted. I'm not sure I'd call what they were doing "cheating" per se because I honestly don't think they understood what they were doing, but it's fair to say that even if performance has improved since those benchmarks were run, Mongo definitely doesn't have any secret sauce.