Experiments with sensor data storage performance

We consider the task of storing sensor data that arrive in small portions from a large number of sources. We suggest a general sensor data storing model with RAM buffering and experimentally evaluate its implementation based on Linux filesystems. We use blktrace tool to study the slowdown that occurs with larger number of sources, and discuss the ways to sustain performance. We give experimental data for write performance and write amplification in ext4 and f2fs filesystems. (In Russian).