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0 pointsepistasis7mo ago0 comments

Single client, I'm getting ~5GB/s, both on an 8-year-old intel server, and on my M1 ARM chip.

However with a single server, it doesn't perfectly linearly scale with multiple clients. I'm getting

1 client: 5GB/s

2 clients: 8GB/s

3 client: 8.7GB/s

0 comments

fukka427mo ago

I'm easily reaching 30GB/s with a single client:

    dd if=/dev/zero of=/dev/null bs=1M status=progress

A second dd process hits the same speed.

epistasisOP7mo ago

My artisanal architecture design uses writes with a few characters and uses unix pipes:

    yes | pv > /dev/null

I hope that in my next rewrite I can advance to larger block sizes.

fukka427mo ago

Interestingly I tried this as well and was disappointed with the results:

  yes $(printf %1024s | tr " " "y") | pv > /dev/null

About the same throughput as letting yes output a single character. I guess Unix pipes are slow.

17186274407mo ago

> I guess Unix pipes are slow.

Or string concatenation, or pipeviewer.

2 more replies

rezonant7mo ago

What's the best hardware for running a /dev/null instance for production?

__turbobrew__7mo ago

A single resistor at ground voltage.

eru7mo ago

That doesn't support expected features like 'stat /dev/null'.

epistasisOP7mo ago

I usually do a kubernetes cluster on top of VMs. But sometimes when I really want to scale the standard cloud server less platforms all support /dev/null out of the box. (Except for Windows...)

wowczarek7mo ago

> Except for Windows...

copy c:\file nul

It's been there since DOS or more likely CP/M :)

2 more replies

dinkelberg7mo ago

How did you measure this? Do you know that /dev/null is the limiting factor, or could it be the data source that is limiting?

j / k navigate · click thread line to collapse

0 comments

fukka427mo ago

I'm easily reaching 30GB/s with a single client:

    dd if=/dev/zero of=/dev/null bs=1M status=progress

A second dd process hits the same speed.

epistasisOP7mo ago

My artisanal architecture design uses writes with a few characters and uses unix pipes:

    yes | pv > /dev/null

I hope that in my next rewrite I can advance to larger block sizes.

fukka427mo ago

Interestingly I tried this as well and was disappointed with the results:

  yes $(printf %1024s | tr " " "y") | pv > /dev/null

About the same throughput as letting yes output a single character. I guess Unix pipes are slow.

17186274407mo ago

> I guess Unix pipes are slow.

Or string concatenation, or pipeviewer.

2 more replies

rezonant7mo ago

What's the best hardware for running a /dev/null instance for production?

__turbobrew__7mo ago

A single resistor at ground voltage.

eru7mo ago

That doesn't support expected features like 'stat /dev/null'.

epistasisOP7mo ago

I usually do a kubernetes cluster on top of VMs. But sometimes when I really want to scale the standard cloud server less platforms all support /dev/null out of the box. (Except for Windows...)

wowczarek7mo ago

> Except for Windows...

copy c:\file nul

It's been there since DOS or more likely CP/M :)

2 more replies

dinkelberg7mo ago

How did you measure this? Do you know that /dev/null is the limiting factor, or could it be the data source that is limiting?

j / k navigate · click thread line to collapse