[LOG] number of written datasets 0  15:30:15.069
[LOG] number of written datasets 1000  15:30:18.565
[LOG] number of written datasets 2000  15:30:22.603
[LOG] number of written datasets 3000  15:30:28.280
[LOG] number of written datasets 4000  15:30:34.832
[LOG] number of written datasets 5000  15:30:42.261
[LOG] number of written datasets 6000  15:30:49.905
[LOG] number of written datasets 7000  15:30:57.440
[LOG] number of written datasets 8000  15:31:05.191
[LOG] number of written datasets 9000  15:31:13.050
[LOG] number of written datasets 10000  15:31:20.805
[LOG] number of written datasets 11000  15:31:28.228
[LOG] number of written datasets 12000  15:31:35.983
[LOG] number of written datasets 13000  15:31:43.740
[LOG] number of written datasets 14000  15:31:51.492
[LOG] number of written datasets 15000  15:31:59.136
[LOG] number of written datasets 16000  15:32:06.996
[LOG] number of written datasets 17000  15:32:14.313
[LOG] number of written datasets 18000  15:32:21.630
[LOG] number of written datasets 19000  15:32:28.944
[LOG] number of written datasets 20000  15:32:35.719