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Why is my Raspberry Pi 4 too slow as a server?

(ergaster.org)
40 points raybb | 1 comments | 24 Jun 25 17:26 UTC | HN request time: 0.296s | source
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trenbologna ◴[24 Jun 25 22:42 UTC] No.44371824[source]▶
> So I can read from my disk at 117 MB/s. We’re far from the theoretical 1000 MB/s.

I think you are confusing megabytes a second and megabit. Gigabit speed is approximately 125 Megabytes per second. This is close to the speed you got.

replies(1): >>44372691 #
kaelwd ◴[25 Jun 25 00:59 UTC] No.44372691[source]▶
Yes but not there, later they get 350MB/s with the same setup.

> I put that drive an ICY BOX IB-1817M-C31 enclosure, with a maximum theoretical speed of 1000 MB/s.

Checks out, it has a 10Gb/s USB port.

The mistake is

> the USB controller of the Pi has a bandwidth of 4GB/s shared across all 4 ports

It's actually 4Gb/s = 512MB/s

replies(2): >>44373323 #>>44374492 #
1. johnklos ◴[25 Jun 25 03:06 UTC] No.44373323[source]▶
USB 3 is 5 Gbps, but real world never exceeds 400 MB/sec. 350 MB/sec isn't bad for a single USB 3 port.