Modern storage is plenty fast. It is the APIs that are bad.

The claims

Towards better APIs

Putting scans to the test

Buffered I/O: Scanned 53GB in 56s, 945.14 MB/s
Direct I/O: Scanned 53GB in 115s, 463.23 MB/s
Direct I/O, read ahead: Scanned 53GB in 22s, 2.35 GB/s
Direct I/O, glommio API: Scanned 53GB in 21s, 2.45 GB/s
Direct I/O, glommio API, large buffer: Scanned 53GB in 7s, 7.29 GB/s

Random Reads

Buffered I/O: size span of 1.65 GB, for 20s, 693870 IOPS
Direct I/O: size span of 1.65 GB, for 20s, 551547 IOPS
Buffered I/O: size span of 53.69 GB, for 20s, 237858 IOPS
Direct I/O: size span of 53.69 GB, for 20s, 547479 IOPS

Conclusion

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