Just a dad with a sysadmin hobby … leaving reddit

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Cake day: June 22nd, 2023

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  • L2ARC only does metadata out of the box. You have to tell it to do data & metadata. Plus for everything in L2ARC there has to be a memory page for it. So for that reason it’s better to max out your system memory before doing L2ARC.

    It’s also not a cache in the way that LVMCACHE and BCACHE are.

    At least that’s my understanding from having used it on storage servers and reading the documentation.


  • I used to do this all the time! So in terms of speed bcache is the fastest, but it’s not as well supported as lvm cache. IMHO lvm cache is plenty fast enough for most uses.

    Is it going to be as fast as a NVME ssd? Nope. But it should be about as fast as a SATA ssd if not a little slower depending on how it’s getting the data. If you’re willing to take that trade off it’s worth it. Though anything already cached is going to be accessed at NVME speeds.

    So it’s totally worth it if you need bigger storage but can’t afford the SSD. I would go bigger in your HDD though, if you can. Because unless you’re accessing more than the capacity of your SSD frequently; the caching will work extremely well for both reads and writes. So your steam games will feel like they’re on a SSD, most of the time, and everything else you do will “feel” snappy too.










  • Restic, it has native S3 compatibility and when you combine with something like B2 it makes amazing offsite storage so you can enjoy the tried and true 3-2-1 backup strategy.

    Also fedora magazine did a few posts on setting it up with systemd that makes it SUPER EASY to get going if you need a guide.

    I have an ansible role that configures it on everyone’s laptops so that they have local, NAS, and remote, B2, backup locations.

    Works like a charm for the past 8+ years.




  • NinetoTechnology@lemmy.world*Permanently Deleted*
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    48 months ago

    In the HAM Radio world we use them. But we also use our own infrastructure. I have mine set to let me know when something happens that needs my attention asap. Only works around my stuff or other HAMs that have stuff tied into our system. So not useful outside narrow circumstances.


  • Waaaaay better.

    Restic allows you to make dedupe snapshots of your data. Everything is there and it’s damn hard to loose anything. I use backblaze b2 as my long term end point / offsite… some will use AWS glacier. But you don’t have to use any cloud services. You can just have a restic repository on some external drives. That’s what I use for my second copy of things. I also will do an annual backup to a hard disk that I leave with a friend for a second offsite copy.

    I’ve been backing up all of my stuff like this for years now. I used to use BORG which is another great tool. But restic is more flexible with allowing multiple systems to use a single repository and has native support for things like B2 that BORG doesn’t.

    We also use restic to backup control nodes for some of supercomputing clusters I manage. It’s that rock solid imho.