Yet another slow speeds thread...

[Fondly1054]

Hi there, my transferspeeds are quite low and I've been trying to figure this out the last few days and might need some help.

Speeds, tested with small and large files range between 3-30MB/s write and 50MB/s read from a SMB-share.
I've checked my Speeds with iperf, its gigabit and that should be fine.
I've also tested my disk speeds with an old bash script I've found on here.

Show : Disk speeds

The slowest disks read speed is way above 30MB/s, why are my transfers this slow, is this expected?
What would be your next troubleshooting steps?

Thank you for taking time out of your day to help me <3

---

Hardware:
Qiyida E5H9 LGA2011-3
XEON E5 2620V3
2x8gb16GB 3200MHz

Disks in RAIDZ2:
4 x ST4000VN008 - Seagate IronWolf 4TB (CMR)
1 x ST4000DM004 - Seagate BarraCuda 4TB (SMR) -> figured out it is SMR and took it offline...

Bootdrive:
WD Blue SN570 NVMe 500GB

 

[Fondly1054]

I've also seen a lot about bad realtek nic's so I've tried with an intel gb ct, same transfer speeds...

iperf is a little faster:

Code:

onboard realtek:
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec   953 MBytes   800 Mbits/sec
------------------------------------------------------------

Intel® Gigabit CT Desktop Adapter:
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.01 GBytes   871 Mbits/sec

TCP window size:  246 KByte (default)

 

[Aurabolt]

Can you post the bash script used for testing please?

 

[Fondly1054]

solnet-array-test

Back in the late '90's, I was managing a bunch of large whitebox storage servers. For the largest of these, I had the pleasure of building and deploying a massive storage server, 8 shelves of 9 drives each, Seagate ST173404LW 73GB drives, a...

www.truenas.com

 

[Fondly1054]

Is is possible for my situation to get better performance out of scale instead of core?

 

[jgreco]

Is is possible for my situation to get better performance out of scale instead of core?

Unlikely. SCALE primarily exists because some technologies that the devs want to use just aren't available for FreeBSD. Linux has the craptacular memory management whereas FreeBSD has the well-integrated one. The developers have been performance tuning TrueNAS on FreeBSD for more than a decade while they're still finding their footing on Linux. Anything's possible, I suppose, but so far it hasn't really been the case.

 

[Fondly1054]

Are there any debug or test scripts that could help me diagnose this any further?

 

[Fondly1054]

For anyone stumbeling onto this Thread in the future, I solved my problems by simply putting a switch and firewall inbetween truenas and the client. Got ~115MB/s after that. Don't blindly trust iperf I guess?