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Why btrfs gets huge perf hit with background IO work?
(lemmy.world)
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this post was submitted on 10 Nov 2023
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Wait, so the benchmarks mostly contradict claims that bcachefs is almost as fast as ext4 except in application startup time? What kind of test performed for that application startup time benchmark?
Note that in this benchmark, bcachefs had a debug variable turned on that allegedly severely hampered performance. Bcachefs has released an update to disable this variable but Phoronix hasn't redone benchmarks yet. I wouldn't put much value into any bcachefs-related comparisons from this current benchmark.
Interesting, that hopefully explains the weak IO troughput. Thank you.
The application startup test is designed to cold-load an application with heavy background IO going on.