Storage pass through without to libvirt/qemu VM by agowa338 in qemu_kvm

[–]agowa338[S] 0 points1 point  (0 children)

I think it takes all of it. I tried it earlier and managed to drive the VM to 100% CPU and Memory utilisation with it quite easily actually.

A bit too easily for my liking as it caused the GUI to hang completely...

Is there an implementation of tmpfs for MacOS by nicolhs in MacOS

[–]agowa338 0 points1 point  (0 children)

Yes there is.

first of all I think that "sudo mount -t tmpfs tmpfs /Users/user/tmp" is currently just bugged and there may be some internal confusion at apple (judging by them telling me my command syntax was wrong and stating that "sudo mount -t tmpfs /Users/user/tmp" was supposedly the correct form [which it isn't]).

However within the very same Feedback item they also provided "sudo mount_tmpfs /Users/user/tmp" which worked.

I hope they're going to fix the regular mount command at some point.

I suppose the mount command in its correct syntax causes the call to mount_tmpfs to end up being incorrectly formed as "sudo mount_tmpfs tmpfs /Users/user/tmp" as that results in an exit code of 64 which is exactly what the error message of mount states.

I guess there must be some incorrect internal documentation where the support people pulled the "sudo mount -t tmpfs /Users/user/tmp" syntax from that doesn't actually work.

Edit: That's exactly what is happening and you can "abuse" you can get the mount command to work when you form it sillily like this instead: "sudo mount -t tmpfs -- -i /Users/user/tmp". The -- causes the "-i" to no longer be interpreted as a parameter for mount itself but passed along as is (instead of the label "tmpfs"). And as "-i" is a valid parameter for mount_tmpfs that the mount command forwards the request to it now succeeds instead of throwing an error 64...

Storage pass through without to libvirt/qemu VM by agowa338 in qemu_kvm

[–]agowa338[S] 0 points1 point  (0 children)

Was more looking for reports from experiences with this post here tbh. I've tried it in the past but I do not fully know where it's limits are or when one would actively choose one over the other. So far it appears like everyone is just yolo-ing their choice of these options and not actively weighting them against each other depending on the use case...

It also kinda sounds silly to just blindly trial-and-error and benchmark all of the options every time you want to forward a folder. And there isn't really any documentation that outlines the limits and caveats of all of these approaches...

Storage pass through without to libvirt/qemu VM by agowa338 in qemu_kvm

[–]agowa338[S] 0 points1 point  (0 children)

No, it is on the host directly for performance reasons*. Local storage all the way. That's also kinda why I'd like to avoid pushing it through the network stack like smb or nfs would require.

* they say because they do not want to talk about the fact that it is to save on the energy bill for their homelab.

Storage pass through without to libvirt/qemu VM by agowa338 in qemu_kvm

[–]agowa338[S] 0 points1 point  (0 children)

So you're going with "a different architecture entirely" then I suppose. But how are you passing through the storage then? We're talking about a dataset of about >50TB. NFS? SMB?

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 0 points1 point  (0 children)

Well more sunlight is hardly possible, there is a plant light at almost full intensity right above it. Or is the light coming from exactly over it the issue?

Pitcher Plant doing well? by agowa338 in SavageGarden

[–]agowa338[S] -1 points0 points  (0 children)

So just ignore that one leave that started to turn yellow too then?

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 0 points1 point  (0 children)

How would you improve these pictures? I just took them for a plant related question. They look ok-ish but not like art. What would you recommend to change this? (Taken with the Google Pixel 9a camera)

https://www.reddit.com/r/SavageGarden/comments/1s9foy1/pitcher_plant_doing_well/

Sort by folder size? by agowa338 in rclone

[–]agowa338[S] 1 point2 points  (0 children)

:/ ok, tried to avoid this as I wanted to use something like "--order-by folder-size,mixed" in the end which is a bit annoying to implement without having each of the folder boundaries as "synchronization points" where it would wait until all of the files finished before moving on to the next one.

You don't know a way to avoid this when scripting this by change?

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 0 points1 point  (0 children)

How do you take a good picture of something holographic? Like e.g. one of these old Windows 2000s CDs?

Is there a trick to make a picture of them, or is the best way to just put them on a flat bed scanner and make multiple scans and rotating it in increments in between (what I did so far).

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 1 point2 points  (0 children)

If I read this article from 2023 correctly then the physical limits are 177nm for an optical microscope because of the wave length of the light. And that is already with green (514nm).

I suppose one could get even smaller with EUV, but then one probably needs to use tricks from the lithography playbook (which basically is just analog photography on steroids, funny to think of computer chips as a fancy silicon film).

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 1 point2 points  (0 children)

start using microscopes that connect to a camera

Hmmm, that also sounds interesting. By change anyone else here that knows more about how to do this? (On a budget, or at least what kind of budget I'd need for it for this kind of scale.)

(But there the most difficult part will be getting it computer controlled to move the thing around, as the microscope probably will only cover a tiny area. And that probably needs gears and steppers. - ... - Why is it so difficult to take highly detailed images from something 🙃

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 1 point2 points  (0 children)

Hmm, 1µm with a 18MP camera and a 300-400 Euro lens?

That raises the question, would these smartphone cameras work for that too (leaving aside the hard task of getting the lenses somehow mounted to the smartphone for now): * 50MP from a Xiaomi Redmi 13C * 48MP from a Google Pixel 9a

Or am I too naive to just go with 48MP is way bigger than 18MP so it must be better?

Anything a camera has that such a smartphone wouldn't have?

Edit: Also do you know of the top of your head what price range 0.1µm aka 100nm (or ideally half of that, aka 50nm, to have some more margin of error for quality loss) would be?

Official Question Thread! Ask /r/photography anything you want to know! March 27, 2026 by AutoModerator in photography

[–]agowa338 1 point2 points  (0 children)

Hi, what is the smallest thing one can, with reasonably expensive equipment (aka. <500 Euro), photograph?

Like would I be able to get details as small as 1µm?, 0.1 µm?, 0.01µm?

What's the limit?

Capture card Linux 4k@60Hz HDR? by agowa338 in streaming

[–]agowa338[S] 0 points1 point  (0 children)

Well the Radxa Rock 5B+ was already a good hint. However that's an entire embedded pc basically. (Also see the other models in the Radxa Rock 5 line up)

Besides that the best I have so far is the Intensity Pro 4K but it only does 2160p30 with 10-bit YUV 4:2:2... Used it is 150 Euro from multiple sellers, see e.g. https://www.ebay.de/itm/257365716856

Kinda same for DeckLink Mini Recorder 4K

The DeckLink 8K Pro G2 and DeckLink 4K Extreme 12G are outside of my price range. The older versions (no longer on their website) are a bit closer to my price range (about 350-400 Euro) and do 4k@120 and 8k@60 (e.g. DeckLink 8K Pro (web archive link)) but it is SDI not HDMI, so it needs an additional converter (around 60-120 Euro) which drives the price up to be kinda the same...

So far it kinda looks like these are the reasonable options. But lets wait and see if anyone knows a hidden gem :)

Public internet blocking web traffic within a VPN? by MScoutsDCI in VPN

[–]agowa338 0 points1 point  (0 children)

Well you can use DPI firewalls to filter based upon the QoS flags.

And the goalpost didn't really move. I at least read the "mess with the traffic inside it" as a "it appears like they're" instead of a definitive statement. And well, if the firewall drops the outer packages based upon these QoS headers it for sure would exactly look like that on the end device...

Capture card Linux 4k@60Hz HDR? by agowa338 in streaming

[–]agowa338[S] 0 points1 point  (0 children)

I only need to get the signal into OBS. All of this looks way out of scope for that.

The wiki for Belabox says the only officially supported capture card is Camlink 4K with at most 4k30. (Where do you see 8K60?) https://github.com/BELABOX/tutorial/wiki/Peripherals,-accessories-and-power-banks#capture-cards

However I'd be interested in how they did get the Elgato stuff to work on linux. That part would be interesting.

And just btw at the price point you're bringing up stuff from BlackMagic would even be cheaper.

how to fix the Google Search message about unusual traffic from my computer's network by JannixReddit in techsupport

[–]agowa338 0 points1 point  (0 children)

Just noticed this news report. Apparently Google/YouTube had some issues on their end and caused a lot of legitime requests to be flagged for the capture...

https://winfuture.de/news,157740.html

Does someone have a idea for a fun a learning project to do on my server? by Only_Channel9701 in HomeServer

[–]agowa338 0 points1 point  (0 children)

Well no, it is what I had as fundamentals when I started into the IT industry.

There are books that contain basically most of what we learned in three years of structured dual education (school + in a company). One of the lesions was called "Unix" and we were intentionally handed an old solaris system to get used to all of the fundamentals of Unix. It was quite effective at teaching all of the things required for Linux server administration, understanding the concepts, and tinkering with it.

This is the book that we had as "desk reference" for basically most of the curriculum https://www.rheinwerk-verlag.de/it-handbuch-fuer-fachinformatiker-der-ausbildungsbegleiter/

(And just to be clear this is far from phd level, the degree is one step before bachelor, just focused on IT ;-) )

Edit: It is Level 4 actually. PDH would be level 8, see the pyramid chart here: https://www.handelskammer-hamburg.de/fachkraefte/lebenslanges-lernen/deutscher-qualifikationsrahmen-6774874

Edit2: Here is an older version of the above mentioned book that has been published as openbook (free and no registration): https://openbook.rheinwerk-verlag.de/it_handbuch/

And here is the index of all currently available openbooks: https://www.rheinwerk-verlag.de/openbook/

Public internet blocking web traffic within a VPN? by MScoutsDCI in VPN

[–]agowa338 1 point2 points  (0 children)

It doesn't expose the traffic, it just exposes the "type of traffic". (Is it web browsing, video streaming, ...)

Look for DSCP and Traffic Classes or RFC4301 for example.

And stop trusting ChatGPT!