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Cake day: September 14th, 2023

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  • There is a much cheaper way that doesn’t use hard drives. It uses magnetic tapes, LTO-9 tapes specifically.

    Each LTO-9 tape cassette can hold up to 45TB of data (compression is used to store it on the raw 18TB).

    An LTO-9 tape drive can cost $10,000. Assuming you get the full 45TB per tape, you’ll need 2223 LTO-9 tape cassettes to store 100PB. Assuming you buy in bulk, you can get each tape cassette for $150 which puts you at $333,450 for the tapes.

    Since the tapes don’t use power when not in use, this concludes the total cost. None of this accounts for storing all 2223 tapes or maintenance to ensure data is still intact on them but this comes out to $343,450 in total to store 100PB using magnetic tapes. While the cost is much cheaper, it’s much harder to access the data as it’s not immediately available since you have to fish out the drive you need and plop it into the tape drive then wait for it to read.


  • Let’s assume you have all hard drives and in a setup with absolutely zero redundancy in case a drive fails.

    We’re using the Seagate Exos X24 (24TB) drive which is roughly $700 each brand new.

    You’ll need 4167 of them to store 100PB. Which puts you at $2,916,900 just for the drives.

    Let’s assume you already have the enclosures, racks, and servers for a small datacenter ready to go.

    A drive can use 4-9w of power when spinning so assuming all drives are active (to ensure quick data access and data repair) that’ll be roughly 27086w for all the drives at 6.5w per drive. Every month (30 days), that is 19502kWh of electricity used. 40 years is roughly 349,680 hours so that comes out to around 9,471,433kWh used.

    Assuming you get some damn good electricity rates at $0.12USD per kWh, it’ll cost $1,136,572 to run just the drives.

    So in total, assuming you already have a datacenter with the capacity to install all the drives that runs on absolutely zero power, you’ll spend roughly $4,053,472 over the course of 40 years.






  • ralakus@lemmy.worldto3DPrinting@lemmy.world3D Printing is Fun!
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    3 months ago

    I’ve a massive blob like this one time when the nozzle got clogged and the extruder created enough pressure to push the filament through the threads of the hotend block. It was on an Anet A8 and I ripped a lead off the thermistor trying to get the plastic off so I ended up replacing the entire hotend.

    You can try to heat up the hotend to a fair bit under the melting point of the filament to where it’s soft and somewhat pliable but not runny or sticky and then trying to peel it off. Though you’d risk damaging any leads to the thermistor, heater, or your hands if you’re not careful.

    Good luck on fixing the printer and getting back to printing again. 3D printing is a really time consuming hobby






  • In small datasets, the speed difference is minimal; but, once you get to large datasets with hundreds of thousands to millions of entries they do make quite a difference. For example, you’re a large bank with millions of clients, and you want to get a list of the people with the most money in an account. Depending on the sorting algorithm used, the processing time could range from seconds to days. That’s also only one operation, there’s so much other useful information that could be derived from a database like that using sorting.






  • I think the main issue is too much fragmentation within Linux. There’s the whole choosing the distro, choosing a desktop environment (or window manager), figuring out how to use the packages for your distro, etc. Then you have issues like some software being too outdated for your distro or not packaged at all so you look into Flatpak but it’s a whole other system on your computer to have to keep track of and maintain or the software you need is not there either so you have to compile from source. There also comes the issue of getting help when something breaks. There’s hundreds of different little bits in every single distro that makes it a pain in the ass to fix sometimes unless you’re using one of the few large distros where the guides actually work.

    I really don’t think Linux will become truly mainstream for the every day user until there is a proper “default” experience like what Windows and MacOS provide. Sure some people will say use this distro and this desktop environment and it’d just work but that forces the common person to trust the other person online and that common person has to make a choice. If their first experience on Linux is bad, they’ll just throw it off altogether and go back to Windows or MacOS. Everyone has a different first experience with Linux.

    I’m not saying strip Linux of all configurability. I’m saying there needs to be a focus on a standard Linux distro with a standardized desktop environment and standardized overall user experience. If the user wants to change any of it, they’re free to do so like anyone can with Linux right now. Also, the user should be able to manage the system entirely through a simple GUI. If the user has to for any reason go into a terminal, Linux has failed at being usable by the common person.

    I say this as a person who uses Arch (btw) on my laptops and desktop and Debian 12 and Proxmox 8 for my servers and RHEL 8 at work. I really love Linux but I just can’t in good faith recommend it to a person who wants to just use their damn computer unless they’re willing to put up with the massive fragmentation and lack of support in the community.

    Tl;dr Linux doesn’t have a “default” experience like Windows or MacOS so a common user will struggle to even get started or look for help/advice