Toot

Written by Tomas Vondra on 2025-01-20 at 12:01

Of course, fsync=1 is expected to have some impact. Every SSD I own shows the same effect, but never this bad. For example:

WD Ultrastar SN640: 50k => 40k IOPS

Intel DC S3700 (6x RAIO0): 24k => 6k IOPS

So the drop 50k => 200 IOPS seems terrible. What am I doing wrong? Any suggestions for a better option (device/model) - still affordable, but handling fsync reasonably?

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