The effect of SSD card on MongoDB

Conclusion 1:SSD card significantly improves the disk Io,io occupancy under 50% 2:SSD card makes MongoDB performance stable.  In the case of 200 concurrency, the data volume is 5 times times the amount of memory and still guaranteed 1500 insertions per second and 4,500 queries. The data is as follows: 1: IO completion per second "All in memory" when there is an SSD card to complete the number of disks per second and the corresponding number of times the disk occupies% no SSD card per second disk completion times and the corresponding number of times the disk occupies%2:SSD 70 million data records read-write ratio of 3:1 performance parameters " SSD occupies 300G "non-SSD2 million data read and write ratio of 3:1 performance parameters for