Another comment here mentioned a recent FAST paper talking about BtrDB, which can get ~16mil writes&#x2F;sec (nanosecond timestamp, 8 byte values) on a single node, with near-linear speedup when clustering: <a href="https:&#x2F;&#x2F;blog.acolyer.org&#x2F;2016&#x2F;05&#x2F;04&#x2F;btrdb-optimizing-storage-system-design-for-timeseries-processing&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.acolyer.org&#x2F;2016&#x2F;05&#x2F;04&#x2F;btrdb-optimizing-storage...</a>