How to test pool speed?

[Lylat1an]

I’d like to know how fast my pool is for internal sequential data transfers.

The only other storage in my server is the boot drive.

Is there a command that can check the pool’s speed without accessing another storage device?

[LarsR]

Fio is build in and can be used to test pool speeds

[Fleshmauler]

@NickF1227 has made a benchmark tool - maybe worth looking & giving feedback:

TN-Bench -- An OpenSource Community TrueNAS Benchmarking and Testing Utility

This is a community resource that is not officially endorsed by, or supported by iXsystems. Instead it is a personal passion project, and all of my opinions are my own. Over the years I’ve spent alot of time playing with benchmarking and min-maxing systems. I cut my teeth on systems engineering the same way I suspect many other Millennials did…overclocking! In that realm, there has always been a plethora of tools driven by the community. From small projects using X264 to test the stability of …

[Lylat1an]

This looks like a rabbit hole, can you tell me what command to type?

[Redcoat]

It only looks like a rabbit hole to a lazy ferret…

[NickF1227]

As someone who works for a storage company, I can personally attest that fio is indeed a rabbit hole

[swc-phil]

@Lylat1an

This looks like a rabbit hole, can you tell me what command to type?

Something like sudo fio --directory=/mnt/<your-pool-name>/fio --name=write --ioengine=libaio --iodepth=4 --rw=write --bs=1M --size=1G --numjobs=4 --time_based --runtime=180 would do. <your-pool-name>/fio is the tested dataset. Tweak the params to your needs.

Also, when testing the reads, you may (or may not, depending on the goal) want to disable ARC. You can do so with sudo zfs set primarycache=none <your-pool-name>/fio.