Linux tricks, tutorials, hardware

My blog will mostly talk about Desktop Linux & it's administration, general philosophy and software politics.

Thursday, June 19, 2025

Impact of mdadm -c, --chunk on random read/write performance and disk space utilization.

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No one knows exactly what this is in context of mdadm, but this must be the minimum i/o size of the RAID block device. Regardless, I did som...
Tuesday, June 10, 2025

mdadm (RAID 5) performance under different parity layouts (-p --parity --layout)

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While performance of right-asymmetric, left-asymmetric, right-symmetric, left-symmetric, is roughly the same, the performance of parity-last...
Wednesday, May 28, 2025

Re-writing HDDs to avoid bitrot/degradation under linux.

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Over the years your archival HDDs are susceptible to bitrot. You've to re-write them on regular intervals to prevent that. You can use d...
Tuesday, April 29, 2025

ffmpeg: Audio/video out of sync in ffmpeg when frame rate limit is set using -r.

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 If you've specified -r at the input, you may like to try moving it before the -vcodec to resolve the issue. With this change, the input...

Ext4 vs xfs (with and without rmapbt) massive small file operations benchmark

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 Methodology /mnt/tmpfs/ contains trimmed linux sources. Large files where removed to reduce the size of the total storage to 5GB. /mnt/tmpf...
Monday, April 28, 2025

Debian trixie vs Gentoo benchmark.

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Recently I came across this benchmark, which although old, but laughable (if you don't know why, I suggest you either readup more about...
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