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7:28 AM
@AndrasDeak like that, yes, but shown permanently for all the selected tags, not just in a pop-up when choosing tags.
@AndrasDeak I get that pop-up too; I suspect it’s not (only) tied to rep, but also to the number of questions asked
@StephenKitt I see
@StephenKitt yeah, I realised I have 170 rep which is more than the 111 threshold on SO
4 hours later…
11:44 AM
@ilkkachu the idea of slurm is that you pass it a script to run. In the OP's original example, that script had a hardcoded header and the two run time parameters and they wanted the header to reflect what the parameters are. Since the header is in a comment and only read by slurm, this isn't possible.
With my wrapper script, they can make sure the header and the content changes based on the parameters. So instead of running "slurm slurm_script.sh" they can now run "make_slurm.sh foo bar > slurm_script.sh; slurm slurm_script.sh" or even "slurm <(make_slurm.sh foo bar)".
12:31 PM
partial for slurm, then?
12:55 PM
@ilkkachu I'd add what seems to be missing for you: there's a scheduler that runs some program. The comments in the job file concern the scheduler, you tell it things like number of CPU cores to allocate, max runtime of the job etc. The actual shell code inside the job file is the job itself normally: it sets up things if necessary and executes the worker (in my case, there's always an mpirun ./executable at the end that does the work that's being scheduled by slurm)
the scheduler and the worker don't even usually run on the same machine
(sorry if I misunderstood your comment)
@terdon @AndrasDeak, yes... and editing the file to embed the values works, if the values are fixed (like I said two times already). But that's not a really interesting case, IMO, it doesn't help in getting dynamic values in the job name. Dynamic values that would be provided by the job manager in whatever ways it provides, e.g. Parallel could give them as command line args, and Slurm seems to have e.g. sbatch -a which sets some SLURM_ARRAY_* envvars.
it does appear to show the array values in the job id, but it doesn't help with dynamically changing the job name.
(which is what I meant with not getting the point of the command line args, since to me, it would make sense that they might change dynamically. And for that, displaying it would need to be done by the manager)
Anyway if you're going to submit the jobs as independent ones, why not just run for x in foo bar; do sbatch --job-name="$x" somejob.sh "$x"; done, instead of modifying the file for every run? The SBATCH lines are an alternative way of passing args to sbatch, right?
@ilkkachu yeah, I was about to say. If you're going to pass the parameters as command line args then you could use the same slurm switches directly. If that's your point then yes, I agree.
I thought you were asking why these arguments in the header were necessary in the first place, when instead you're saying that it's an XY problem
@AndrasDeak mm, no. I get the point of having the header to pass some metadata to the manager. But I was assuming that the command line args would possibly be used to pass dynamically varying data, as in that you could tell the manager to "run this thing a hundred times, with the command line args set to one of the numbers between 1 and 100, one for each invocation". Or "...using this list of words, one for each".
And for that, it's the manager that needs to support embedding the data in the name, or where ever, if that's considered useful. Might be that in this context, it's not considered useful.
1:28 PM
Oh, yeah, slurm has to support batched execution like that, but I've never used it like that so no experience there
all major schedulers support that I think
1:42 PM
Following on the text-processing meta-question and the discussion around tools v. tags, I shall henceforth recommend Make (but won’t tag questions with ).
A: Using wildcard elegantly

Stephen KittYou can’t do it directly with wildcards, but a for loop can get you there: for epub in ./*.epub; do ebook-convert "${epub}" "${epub%%.epub}.mobi"; done Zsh supports a more elegant form of this loop. Instead of a shell script, you can use Make; put this in a Makefile: all: $(patsubst %.epub,%.mob...

cough make it so cough
make: *** No rule to make target 'it'. Stop.
ha ha
actually I could just write my Makefiles here so that make it so does something useful ;-)
I mean, that should be a default, if I was in charge
2:09 PM
You mean if you were in charge, there would be a default?
surely a disaster ;)
@ilkkachu yeah, that's how I'd probably do it too. Unless I was in a situation where I need to keep separate scripts so I can easily repeat an experiment. I've written things like this when I was in academia, so that I could then have a folder with all the scripts needed for a project.
2:59 PM
@StephenKitt At this point make is just a glorified interpreter
3:53 PM
@Braiam yes, it interprets Makefiles
Hi folks. I have a question about scanning. It's too vague for the site, I think. It may not even be on-topic.
The other possibility, I suppose, is SuperUser.
If I scan at 200dpi the file is nice and small, but the words are a bit misshapen. Being the freak I am, this sometimes bothers me a little. At 600dpi, the words look good, but the file size is substantially larger.
But it occurred to me that a lot of the file size (even in "outline" mode) is probably bits that represent scans of the white area. I should have mentioned that these scans all all exclusively paper documents with the Roman alphabet on them, and not much else.
So it one could get rid of all the surplus white area scanning, the file might come down quite a bit. But I'm not sure how to do that.
4:09 PM
How large are your files?
For a B&W 600dpi scan of an A4 page of text I reckon on around 500KiB. There’s no white to remove, it’s taken care of by compression.
Just make sure to save in a compressed format... Probably JPG in particular, since it's no use storing all the noise losslessly.
I should have mentioned that the files are PDF.
Yes, I use PDFs too.
@StephenKitt My B&W Fujitsu ScanSnap runs between 130 and 250 Kb for a single page. At least for the relatively unbusy documents I'm currently looking at. But a 200dpi one is 70Kb.
@ilkkachu JPGs aren't ideal for printing. And AFAIK you can't trivially stick them together like you can with PDFs.
@FaheemMitha I can tell you that the norm I've seen in scientific journals is that they require images at 300dpi and my experience with that has been that 300 is more than enough for it to be clear.
4:24 PM
@terdon Hmm, I've not tried 300dpi. Can you avoid the misshapen text issue at that resolution?
Dunno, but I guess you'll find out :)
30dpi has been fine for publication quality PDFs anyway, so I expect it will be OK.
@terdon OK. I'll try 300dpi. Thank you for the suggestion.
1 hour later…
5:39 PM
250 Kb for a scanned page seems OK to me...
@AndrasDeak For large documents it adds up.
1 hour later…
7:01 PM
@terdon (and other U&L mods) does this seem like a good fit here?
Q: Install oracle on an AIX VM virtualizing with QEMU

Luis HenriqueI installed a Linux VM in the virtual box, and inside it I installed the QEMU package and virtualized an AIX 7.2 image. The entire installation went correctly. But when I try to install an Oracle inside the AIX VM that is virtualized by QEMU, I get a Segmentation fault message. Start VM Qemu: ppc...

nevermind, I see they crossposted it.
@HannahVernon I can't find any reason of segfault.
Also, it's already posted here.
@Braiam seems weird to run AIX inside virtualized QEMU on a virtualized linux inside AIX.
@Braiam yes, I noticed that
@HannahVernon Sounds like a good reason to run solaris instead
7:24 PM
hi, i had a question about wsl - i have wsl 1 installed, and am trying to update it to wsl 2. i've checked and i have sufficient base versions and so forth to update, and i'm following the instructions in the microsoft docs. i have run dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart, and it says operation completed successfully.
however, when i try to switch the default version for wsl to 2, it gives Please enable the Virtual Machine Platform Windows feature and ensure virtualization is enabled in the BIOS. For information please visit https://aka.ms/wsl2-install
the link simply leads right back to the documentation instructions i'm following.
i'm honestly not sure what i'm missing here.
Control Panel>Programs>Turn Windows Features on or off
to check for the virtual machine platform windows feature
The bios feature would be in your bios under cpu settings most likely
yeah the virtual machine platform windows feature shows as on
let me check the bios feature
Hi @HannahVernon, yes that looks fine be. Our scope is quite broad: if it's about a *nix system, chances are it's on topic. Thanks!
cheers, @terdon - they already crossposted it, so I've closed the one at our end.
okay yeah, i checked bios, and it shows intel (vmx) virtualization technology, which is what i assume they mean, as already enabled
oh wack i just reran the command and it worked
huh, idk why it wasn't working earlier
well thank you @jesse_b
7:40 PM
:) microsoft things don't always make sense
very true lol
@HannahVernon yeah, I saw. I was just on mobile and hadn't realized the original you'd shown me was on another site. I was even wondering why it'd been closed! :)
Also, hey @AudenYoung, nice to see you 'round these parts!
@jesse_b microsoft things don't always make sense
yeah it probably got fixed by turning it off and on again
3 times
7:51 PM
@terdon o/ good to see you :)
wow all the diamonds are here xD
mod abuse
8:09 PM
Hey, Auden
8:23 PM

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