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OpenZFS
  • Mirror problem

    February 22nd, 2024

    update
    :: Synchronizing package databases…
    kde-unstable is up to date
    core is up to date
    extra is up to date
    error: failed retrieving file ‘kde-unstable.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    error: failed retrieving file ‘core.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    error: failed retrieving file ‘extra.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    warning: too many errors from pkg.fef.moe, skipping for the remainder of this transaction
    :: Starting full system upgrade…
    there is nothing to do
    :: Synchronizing package databases…
    kde-unstable is up to date
    core is up to date
    extra is up to date
    error: failed retrieving file ‘kde-unstable.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    error: failed retrieving file ‘core.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    error: failed retrieving file ‘extra.db’ from pkg.fef.moe : SSL certificate problem: certificate has expired
    warning: too many errors from pkg.fef.moe, skipping for the remainder of this transaction
    :: Searching AUR for updates…
    :: Searching databases for updates…
    there is nothing to do

    Installing reflector and updating my mirror by download rate just solved the issue completely:

    reflector –verbose -l 5 –sort rate –save /etc/pacman.d/mirrorlist

  • February 21st, 2024
  • C vs Assembly vs Python speed comparison

    February 21st, 2024

    First video is the computation of Fibonacci (42) and seconds the prime numbers < 250.001

  • Average USMLE Step 2CK score in Nepal was 259!!!

    February 21st, 2024
  • USA vs Nepal statistical analysis and performance in USMLE Steps

    February 21st, 2024
  • USMLE cheaters responded to questions in under 20 seconds …

    February 21st, 2024

    They also identified cheaters by their very unusual response times and accuracy.

    For instance, although USMLE questions typically require ~90 seconds to answer, the plaintiff answered many USMLE Step 1 questions in <20 seconds – and did so with 100% accuracy. pic.twitter.com/A7IbUogEW5

    — Bryan Carmody (@jbcarmody) February 19, 2024
  • 832 candidates had their USMLE scores invalidated

    February 21st, 2024

    First, the NBME confirmed the number of examinees involved.

    According to their filing, 832 examinees have had at least one of their USMLE scores invalidated… so far. pic.twitter.com/LQbh80EJ0x

    — Bryan Carmody (@jbcarmody) February 19, 2024
  • NBME court ruling

    February 21st, 2024

    UPDATE:

    Last week, a Nepali doctor filed a class action lawsuit against the National Board of Medical Examiners, alleging discrimination based upon national origin and requesting that invalidated USMLE scores be restored while examinees appeal.

    Today, the NBME responded.

    (🧵) https://t.co/Cm8PS6c0wA

    — Bryan Carmody (@jbcarmody) February 19, 2024
  • USMLE cheaters from Nepal

    February 21st, 2024

    A screenshot from a Telegram group by another anonymous reddit user

  • February 21st, 2024
  • February 20th, 2024
  • Starting using Weblate for FreeBSD localization

    February 18th, 2024

    https://github.com/freebsd/freebsd-doc-translate/commit/a40088fd18c9c02c1395795084fe8efabce79bc8

  • Uber – Database model

    February 18th, 2024

    Uber uses Docstore an in-house, distributed database built on top of MySQL, serving 40 Million Reads Per Second in a dataset of tens of Petabytes.

    https://www.uber.com/en-IN/blog/how-uber-serves-over-40-million-reads-per-second-using-an-integrated-cache

  • GNOME 46 beta

    February 18th, 2024

    With Variable Refresh Rate (VRR) support by Mutter

    https://discourse.gnome.org/t/gnome-46-beta-released/19505

  • OpenZFS – Fast Dedup

    February 18th, 2024

    Fast Deduplication was developed by Klara Inc and iXsystems and offers up to x20 greater performance.

    “With the introduction of Fast Dedup, there have been several major innovations including:

    • The size of metadata is now dynamically sized to fit in either RAM or dedicated flash devices to avoid hitting the performance penalty wall.
    • The metadata structure has been completely re-engineered to enable efficient updates using a log append process, greatly improving performance for large updates such as deletions.
    • The dedup table will favor dedup-able data and prune blocks that show no dedup potential.
    • Combining metadata improvements with properly configured storage, including dedicated metadata flash devices, will improve the sustained dedup performance by over an order of magnitude for larger systems.”

    Some users are sceptical about potential data loss issues, as with any filesystem technologies..

    https://www.ixsystems.com/blog/fast-dedup-is-a-valentines-gift-to-the-openzfs-and-truenas-communities

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