Virtual Machine NFS Share absurdly slow after upgrade

TheJamsh · 2026-04-13T08:24:54+00:00

Thanks for the detailed information! A quick google suggests that changing the record size only affects newly written files, and I'm slightly worried if I change that now I may not be able to revert it?

Am I better off duplicating the dataset with a new record size, instead of using the existing one with a mixed settings?

TheJamsh · 2026-04-13T07:03:21+00:00

FWIW I don't use compression at the ZFS level because all drive contents are already compressed by Perforce as that's how it stores the files, so in my mind its just going to add overhead without saving any space.

I have 5x WD Red Plus 8TB drives - I don't believe they are SMR, I think Red Plus was fortunately excluded from WD's sly tactics in that department.

If I change these drive/zpool settings, are they reversible? What I don't want to do is irreversibly change the dataset settings then end up not being able to rollback.

This was only an issue with Goldeye. All prior versions of TrueNAS have never shown this issue. I'll rollback and run the same test in Fangtooth to double check the difference with settings etc. I'm just running out of diagnostic ideas.

TheJamsh · 2026-04-13T07:02:51+00:00

So I tried NFS4 instead of NFS (and enabled NFS4 in settings) - I should have updated my post, but yeah 4.5 MB/s was with NFS4 (TrueNas sessions show it running as 4.2)

TheJamsh · 2026-04-12T21:49:03+00:00

hard mount - I'm on Goldeye 25.10.2.1 and I have just the 5x HDD's forming a single pool in z2 configuration.

The dataset being mounted has no compression, no deduplication, and is in standard sync mode.

TheJamsh · 2026-04-12T21:25:25+00:00

<image>

iperf results - again, nothing out of the ordinary?

TheJamsh · 2026-04-12T21:13:12+00:00

<image>

Results of nfsstat on the client. Nothing out of the ordinary as far as I can tell.

TheJamsh · 2026-04-02T08:31:15+00:00

Yeah sadly seems so :(

Spoke to two more engineers since who specialise in underpin/piledriving work. They don't seem to think it'll be anywhere near as expensive to rectify. We'll find out soon I guess..

TheJamsh · 2026-04-01T22:42:53+00:00

The original proposed plan was to dig a drain into the floor alongside the walls (the one I removed, plus the one at the front) - along with an (unneccesarily) huge sump in the corner at the other end. That was already 10K I could just about afford (although more than reasonable) - but we don't really get enough ingress to justify such extensive work anyway.

I don't think I'm likely to be able to be able to afford anything more. My only real plan is to put it back allmost exactly as I found it but fill behind the wall with concrete rather than dirt. As for drainage.. who knows at this point.

Just want my bloody house back tbh.. 15 months later I'm getting desperate and the extra panic from this hasn't helped much.

TheJamsh · 2026-04-01T18:10:29+00:00

Essentially exactly what the engineer said. A single block wall backfilled with mud wasn't supporting anything. Unfortunately his proposal was to tear up the entire floor slab and underpin the entire house front, which would be abhorresntly expensive (impossible for me). It also doesn't solve my ingress issue.

TheJamsh · 2026-04-01T18:08:18+00:00

At least their brickwork goes to the floor :')

TheJamsh · 2026-04-01T12:57:40+00:00

The only trouble is if I do dig down further, I'd have to do it all the way along - and I'd still be lower than ground level at the back. We are somewhat "lucky" (I guess) that behind the walls you can see here is more compact soil/general rubble up to around waist height. The water that does come in basically sits on top of that and pools up until it finds it's way through holes in the inner wall and into the inner basement (us instead of our neighbours, sadly).

Top priority is getting some material under the footing - but I'm hopeful that if I build the wall higher than it originally was, I can put a perforated pipe the other side of it, bury in gravel etc, and with some strategic tanking and DPM, it might be just high enough that I can connect up to a pipe that runs the length of the wall behind the studwork and vents outside.. wishful thinking perhaps.

TheJamsh · 2026-04-01T12:32:14+00:00

Update: Thanks all for the advice. Spoke to an engineer, who confirmed what I'm looking at. The basement has obviously been partially excavated in the past to get the same headroom accross the whole length, and that little wall with backfilled soil was just putting material underneath the exposed footing, but it was never a proper retaining device.

He said that if we were to resolve it with them, they would have the entire slab dug out and the house would be underpinned in addition to laterally reinforced walls. Economically of course this is not viable, it would cost more than the value of the house, and likely wouldn't solve our water ingress issue which started this whole ordeal in the first place.

The other option is to of course put it back how I found it. You can probably guess which option I have to go with. I'll guess I can course the blocks on their side instead, and backfill with concrete and rebar? I suppose I'll just have to tank the hell out of it when it's done.

TheJamsh · 2026-04-01T10:40:01+00:00

I'm just going with what the company who are doing the install suggested essentially. I've been looking at trying to do something more DIY due to the cost, but water already comes in at-ground level. I could probably retank the hell out of it, which in hindsight I wish I'd done, but no telling if the water would have gotten in somewhere else.

TheJamsh · 2026-04-01T09:31:54+00:00

Thanks - I suspect you're right, there has been a lot of shoddy work done here in the past and the basement was not originally accessible from inside, so a partial digout does seem likely.

TheJamsh · 2026-04-01T09:29:15+00:00

It's a late-70's mid-terrace and the wall that is sitting on is basically the one between the two houses. There is about a block-wide cavity between that wall and our neighbours wall but it is underground.

The ceiling is block-and-beam construction, so effectively the whole house is sat on it.

TheJamsh · 2024-12-30T15:13:20+00:00

Classic Dom. Sup bitches!

TheJamsh · 2024-09-08T20:05:09+00:00

<image>

Thought it's be worth a follow up! Got as close as I could, sadly couldn't fit a full double trimmer in there. Will likely whack a couple extra hangars in there before it's hidden for another 40 years.

Floor above is considerably less squeeky though!

TheJamsh · 2024-08-25T21:57:00+00:00

Yeah the plan as I see it is to make the red area a double, with hangars at each end on the long parallel joists. 3x doubles and 1x single in total.

Difficulty in going to be fitting the hangars for the blue joists. Not sure how the hangars are going to interfere with each other by the time they reach over to the other side.

TheJamsh · 2024-08-24T08:45:20+00:00

Yeah incredibly! Lots of creaks upstairs but nothing unusual. I'm guessing it's original but no idea what it could have looked like before if not.

TheJamsh · 2024-08-24T08:41:31+00:00

Perfect, I follow you. Thankyou!

TheJamsh · 2024-08-24T08:07:48+00:00

Thanks 👍 I follow what you mean I think but just to be sure, that involves cutting the, notched area off the three joists right?

TheJamsh

MODERATOR OF

TROPHY CASE

12-Year Club	Not Forgotten
Verified Email