~4.8GB/s DC P3608 NVMe SSD Write 4KB randomly to SATA SSD 500 μs DC S3510 SATA SSD (QOS 99.9%) Read 4KB randomly from SATA SSD 500 μs DC S3510 SATA SSD (QOS 99.9%) Round trip within same datacenter datacenter 500 μs One‐way ping is ~250μs Read 1MB sequentially from SATA SSD 2 ms ~550MB/s DC S3510 SATA SSD Read 1MB sequentially from disk 5 ms ~200MB/s server HDD Random Disk Access (seek+rotation) 10 ms