Net Speed, Disk Write, and Disk Used graphs are reporting inflated numbers
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Ken Moore August 13, 2021 at 12:10 PM
No, this ticket is not about supporting SMB multichannel.
Once that functionality lands in TrueNAS, then we will make tickets specifically about that functionality and assign it to an appropriate version target.
Basil Hendroff August 13, 2021 at 2:10 AM(edited)
Thanks for the clarification. I'm just wondering whether the status should be changed to 'TO DO' and the fix version set to 2.1 so it can at least be reviewed then. From Andrew's comments, it seems that multichannel SMB isn't that far off.
Andrew Walker August 12, 2021 at 12:33 PM(edited)
I updated the old forums post. At that time official multichannel support upstream was scheduled for a version that was scheduled for TN 12. The intention of that post was to explain why there was no multichannel feature in the webui – it's not supported. The implication was to be – there will be webui feature when it is supported. My post was to caution users that there were edge-case data corruption bugs.
Things got bumped back upstream. Currently multichannel is coming out of "experimental" state in 4.15 (which is in RC2 now). This means that eventually SCALE will have multichannel support officially at some point after we have updated to that Samba version.
That said, the primary indicators that multichannel is supported will be (1) webui feature and (2) documentation.
Basil Hendroff August 12, 2021 at 3:46 AM
I've added post #32 to community resource Setting up SMB 3 multichannel on FreeNAS letting the community know that this is not supported. Post #20 though is misleading as @anados suggests that it is expected to be supported under TN 12.
Ken Moore August 11, 2021 at 5:18 PM
So I just had a talk with our resident SMB expert, and found out 2 important pieces of info:
1. Multichannel SMB is not a supported configuration in TrueNAS. To get it working on TrueNAS right now would require some large changes to configs which could adversely impact all sorts of underlying subsystems.
2. Multi-channel SMB should not be creating any virtual interfaces on the NAS if done properly.
The end result is that this NAS appears to be in a highly-customized/unsupported configuration. Since we cannot reproduce the issues the OP mentions, the only conclusion we can come to is that it is an artifact of that particular NAS configuration and not something that TC will ever run into with supported TrueNAS configurations.
Feel free to open a new ticket later if this issue appears again on supported TrueNAS configurations or if you are able to diagnose the issue on this specific NAS yourself and give us more specifics.
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I am using TC 2.0.1 connected to a TrueNAS core 12.0-U4.1 system and I am noticing that the Net Speed, Disc Read/Write and Disk Used Graph metrics appear to be much too high sometimes. It seems most of the time the reported numbers are 2-3x too high.
I have confirmed that the issue is still present in the latest nightly build (Master-20210720).
Multi-channel SMB is correctly setup on my TrueNAS core system and I have no trouble achieving a multi-link speed when transferring to/from the system from two other systems on my network that also have a dual link connection. Performance is not the concern here, the numbers being reported by TC are the concern.
The TrueNAS system details are as follows:
Motherboard: ASUS P5K-VM
CPU: Intel Core 2 Quad Q9550 @ 2.83GHz
RAM: 6GB DDR2
Hard Drives:
5x 4tb drives drives in RAID-Z1
2x Hitachi 4tb 5700 RPM drives (model HDS5C4040ALE630)
2x WD Red 4tb 5400 RPM drives (model WDC WD40EFRX)
1x WD Red Plus 4tb 5400 RPM drive (model WDC WD40EFZX)
OS Drive: 64GB mSata SSD (model JAJMS600M64G )
HD Controllers:
On board SATA controller in AHCI mode (OS drive and 3 platter drives)
I/O Crest 4 Port SATA III PCI-e 2.0 x1 Controller (chipset: Marvell 9215) (other 2 platter drives)
Network cards:
On-board Marvell Yukon 88E8056 Gigabit Ethernet
PCI Intel(R) PRO/1000 Network Connection
I have attached a few screenshots to show the issue I am seeing. With only a single transfer being made to this system from a windows system, the network speed and disk write speed are both inflated.
Here is a screenshot of the copy in progress from the Windows machine, you can see that the TrueNAS box is having no trouble sustaining ~170MiB/s write speed, which is perfectly acceptable for my use case and honestly, higher performance than I expected from this underpowered build (yay TrueNAS!)
Now, during this same transfer, you can see what TC is reporting:
On the left, Net Speed shows 11.8Gb/s and Disk Write shows 483MiB/s . The Disk Used graph is also reporting the inflated write speed values, whereas Net Used appears to be accurate.
Now, I don't expect the numbers between Windows and TC to be exact by any means, but I would figure within +/- 10% or so would be expected.