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Async I/O on Linux in databases

news.ycombinator.com Jeremy Tregunna 2025-07-20 06:20:02

I've been working on a complex multi-model database for a few weeks now, and recently I took time to simplify and test out an idea I had on a simple key-value database. I started with the basics: A hash table in memory, a simple append-only log for persistence and durability, and the classic fsync() call after every write to the log for durability. It worked, but wasn't as fast as it could be. In Kevo, that's the approach I use, but in Klay (not public yet, but will be open sourced when ready)

Topics: completion intent io_uring operations wal

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Microsoft mistakenly tags Windows Firewall error log bug as fixed

bleepingcomputer.com Unknown 2025-07-21 02:34:59

Microsoft has mistakenly tagged an ongoing Windows Firewall error message bug as fixed in recent updates, stating that they are still working on a resolution. Earlier this month, Microsoft warned that, starting with the June 2025 Windows 11 preview update, users would see Windows Firewall errors in the Event Viewer. These events would be labeled as event ID 2042 for the Windows Firewall With Advanced Security, and would be generated every time you restart Windows. "The error is found in Event

Topics: event firewall issue microsoft windows

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The best MagSafe accessories of 2025 for your new iPhone

zdnet.com Kayla Solino 2025-07-21 14:13:00

Anker's MagGo 3-1 Wireless Charging Station for iPhone is still a wireless charging dream almost seven months after my initial purchase, and it's also ZDNET's pick for best wireless charger. This MagSafe charger features 15W charging, offers a stand component for my iPhone, charges all of my Apple devices at once, and folds up easily for quick transport and storage. It also comes with a wall adapter, which isn't always a guarantee. Also: I found a Qi2 charging station that can do it all (and Ap

Topics: anker charger charging wall wireless

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A New Study Finds That Walking 14 More Steps Per Minute Can Support Healthy Aging

cnet.com See Full Bio 2025-07-23 05:07:00

If you've been under the impression that walking has no benefits and doesn't count as exercise, a brand new study might change your mind. Published on Wednesday, the study focused on 102 prefrail and frail older adults over 12 weeks, randomly splitting them into two groups: casual speed walking and high-intensity walking. What the authors discovered is that those who were able to increase their walking cadence by 14 steps per minute had a 10% increase in the odds of improvement during a 6-minute

Topics: health lower minutes walk walking

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Best AirTag wallets 2025: I tested the best options to track your cards and cash

zdnet.com Kayla Solino 2025-07-23 22:25:00

Apple's AirTag is perhaps the most popular Bluetooth tracker on the market. While AirTags can be easily attached to keys, cutting-edge accessories let you use them on luggage, pet collars, remotes, and wallets. We've compared the best AirTag wallets from brands like Ridge and Titan X for card capacity, design, and overall value. We've also provided alternative Bluetooth tracker options like Bluetooth wallet cards. What's the best AirTag wallet right now? The accessory market is flooded with d

Topics: airtag card cash like wallet

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Hackers are trying to steal passwords and sensitive data from users of Signal clone

techcrunch.com Lorenzo Franceschi-Bicchierai 2025-07-24 02:42:48

Hackers are targeting a previously reported bug in the Signal clone app TeleMessage in an effort to steal users’ private data, according to security researchers and a U.S. government agency. TeleMessage, which earlier this year was revealed to be used by high-ranking officials in the Trump administration, already experienced at least one data breach in May. The company markets modified versions of Signal, WhatsApp, and Telegram for corporations and government agencies that need to archive chats

Topics: according hackers signal telemessage waltz

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9 Best MagSafe Wallets, Tested and Reviewed (2025)

wired.com Brenda Stolyar 2025-07-24 23:37:00

Other Good MagSafe Wallets Photograph: ESR ESR Magnetic Wallet HaloLock With Find My for $36: Like Apple's MagSafe wallet, this one has Find My support. You can use the flap on the back as a grip and fit two cards easily. It does require recharging, which is annoying, but after six months, it didn't lose much battery life. Still, recharging requires a proprietary cable, so don't lose it. And do you really want to recharge your wallet? OtterBox Symmetry Series Cactus Leather MagSafe Wallet for

Topics: cards grip leather magsafe wallet

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Team AA: Here are our favorite phone wallpapers

androidauthority.com Unknown 2025-07-27 05:00:35

Hadlee Simons / Android Authority Whether it’s our weekly Wallpaper Wednesday series or backgrounds from specific devices, we’re all about sharing wallpapers with you folks. But what are our favorite wallpapers that we use on our own Android phones? Well, I asked the Android Authority team for their favorite backgrounds. Some team members used wallpapers showing their loved ones and were thus unable to share their backgrounds. Fortunately, we still had more than a few cool submissions from oth

Topics: like says taken wallpaper wallpapers

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How Disneyland’s New Walt Animatronic Helps Celebrate the Past

gizmodo.com Sabina Graves 2025-07-27 18:00:22

Walt Disney—A Magical Life finally joins the Disneyland 70 anniversary festivities at the Disneyland Resort. The long-anticipated docu-style attraction featuring Walt Disney himself in audio-animatronic form is set to become a permanent feature at the Opera House on Main Street, USA, at the park’s entrance. io9 was on hand for the media preview of the show ahead of its premiere July 17, the day the park turns 70. As part of the new show, the lobby gallery inside the Opera House has a new exhibi

Topics: disney disneyland life park walt

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4 ways Google Wallet can make your life easier (and more organized)

zdnet.com Jack Wallen 2025-07-28 10:42:00

NurPhoto / Getty Images Imagine this: You're on vacation and you're asked for a ticket, a card, or some other form of identification. You rifle through your purse or wallet to find it, only to realize you're holding up the line. Suddenly, a group of angry travelers is getting frustrated -- and that frustration is aimed squarely at you. The more frustrated you get, the less likely you are to find what you're looking for. The struggle only worsens, and you end up looking like you have no idea wh

Topics: cards google ll save wallet

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I found an AirTag dupe that lasts twice as long (and works with Android)

zdnet.com Adrian Kingsley-Hughes 2025-07-28 10:47:55

ZDNET's key takeaways Ugreens Finder Tag is on sale now for $16, and the Slim Wallet Finder is available for $30. The battery in the tag for keys is purpose-built to be hard to remove, making it safer around children. They don't have the high-precision capabilities as more expensive finder tags. $16.59 at Amazon Apple AirTags been a game changer in my life, saving me countless hours searching for my keys, wallet, and passport. But as handy as they are, they're not without their flaws. From a

Topics: battery finder tag wallet zdnet

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Charge on the go: Satechi launches new GaN wall charger and lanyard cable

androidauthority.com Unknown 2025-07-28 14:00:40

Satechi TL;DR Satechi is launching two new additions to its OntheGo collection. These additions include the 67W Slim Wall Charger and USB-C Lanyard Cable. Both items are available in Black, Sand, and Desert Rose. When you’re on the road, you never know when you’ll need to stop to charge your various devices. That’s why it’s crucial to always pack a charger and cable. And the more travel-friendly those items are, the better. On this front, Satechi has a whole line of products designed to be c

Topics: cable charger lanyard usb wall

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My favorite accessory brand finally made a MagSafe wallet with FindMy built-in, and it's super sleek

zdnet.com Kayla Solino 2025-07-28 18:17:32

ZDNET's key takeaways The Nomad Leather Mag Wallet is an $80 MagSafe wallet with built-in Apple Find My technology. It's sleek, holds up to four cards, is made of Horween leather, and is Qi rechargeable. It lacks storage for cash, and the four-card storage might not be enough for some. View now at Nomad Goods Here at ZDNET, we're no strangers to Nomad's top-notch accessories. The brand makes some of my favorite accessory products, including the Slim Sport Apple Watch Band, the Universal Cable

Topics: cards leather magsafe nomad wallet

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Review: SwitchBot Wallet Finder is an incredibly useful accessory to track your wallet with iPhone Find My

9to5mac.com Benjamin Mayo 2025-07-29 13:09:48

I have an AirTag on my keychain to keep track of my keys, but obviously an AirTag is too big and bulky to fit inside a wallet. That’s what the SwitchBot Wallet Finder is for. Disguised inside a thin, credit-card form factor, the SwitchBot Wallet Finder connects to the Find My app on your iPhone, so you can follow its location, and it even houses a speaker so you can make it beep to help you find your wallet when it inevitably gets lost somewhere in your home. Read on for my review … Setup Set

Topics: app card finder item wallet

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Walt Disney Returns as a Surreal Animatronic for Disneyland’s 70th Anniversary

gizmodo.com Sabina Graves 2025-07-29 18:30:57

As of this week, Walt Disney returns to his original Magic Kingdom, with a little help from the magic-makers at Imagineering. Through the audio-animatronics technology Walt Disney introduced when he opened Disneyland 70 years ago, the evolution of the show robots has gone from static positioning with some movements, as first seen on the singing birds in the Enchanted Tiki Room, to a roaming animatronic of Uncle Walt. Stationed in the Main Street Opera House, the (m)animatronic is the crown jewe

Topics: animatronic disney figure life walt

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Stone–Wales Transformations

news.ycombinator.com Unknown 2025-07-31 13:07:12

Buckminsterfullerene is a molecule shaped like a soccer ball, made of 60 carbon atoms. If one of the bonds between two hexagons rotates, we get a weird mutant version of this molecule: This is an example of a Stone-Wales transformation: a 90° rotation in a so-called ‘π bond’ between carbon atoms. Here’s how it works in graphene: Graphene is a sheet of carbon molecules arranged in hexagons. When they undergo a Stone–Wales transformation, we get a Stone–Wales defect with two pentagons and two he

Topics: graphene hexagons stone transformation wales

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Rian Johnson Feels Fine About ‘Star Wars: The Rise of Skywalker’

gizmodo.com Justin Carter 2025-07-31 15:25:20

The changeover from Star Wars: The Last Jedi to The Rise of Skywalker had everyone feeling some type of way, and it continues to this day. Was J.J. Abrams spitefully undoing Rian Johnson’s work in Jedi, or are the two more in conversation with one another than they appear? In Johnson’s eyes, it’s the latter, and something he harbors no ill will about. While chatting with Rolling Stone about Poker Face’s just-wrapped second season, he revealed he had “a great time” watching Skywalker and didn’t

Topics: jedi johnson skywalker star wars

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The best Plex alternative in 2025 is Jellyfin, and you really should try it

androidauthority.com Unknown 2025-07-31 05:40:39

Robert Triggs / Android Authority Self-hosting is an increasingly popular alternative for those looking to escape the convoluted (and expensive) content-streaming landscape and return to a more traditional personal ownership approach to their media collection. Once you’ve bought your fancy new Network Attached Storage (NAS) and filled it with your favorite movies, the next step is to figure out what software to run on it. There are at least two solid options for serving up your media collectio

Topics: jellyfin paywalled plex transcoding yes

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Download the stock Samsung Galaxy Z Flip 7 and Z Fold 7 wallpapers here

androidauthority.com Unknown 2025-07-31 20:28:40

The Samsung Galaxy Z Flip 7 and Z Fold 7 are finally here, and although you’ll have to wait until the end of the month to get your hands on one. If you want to get in on the action early, you can now download Galaxy Z Flip 7 and Galaxy Z Fold 7 wallpapers to add them to your existing device, thanks to X user Raven. This year’s stock wallpapers feature a distinct Z design in four different colors. As always, there are matching wallpapers for the interior and exterior screens of both device, so y

Topics: download galaxy set wallpaper wallpapers

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I finally found a wall charger than can replace my AirTag when I travel - and it's still on sale (but hurry)

zdnet.com Allison Jewell 2025-08-02 02:43:28

ZDNET's key takeaways Twelve South's PlugBug is a wall charger optimized for iOS, offering native Find My support. It's especially convenient for frequent flyers who are prone to misplacing their vital charging cables. The device is pricey but worth it for its bulk, versatility, and convenience. $129.95 at Apple The PlugBug Travel 120W is currently on sale during the last day of Amazon Prime Day for $85, which is $35, or 29% off its original price of $120. On my first trip abroad, one of my

Topics: 120w charger plugbug travel wall

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The Walking Dead is coming to Dead by Daylight

engadget.com Unknown 2025-08-09 02:32:15

Play as Rick Grimes, Michonne, or Daryl Dixon as you try to escape the Trials of The Entity. Behaviour Interactive never misses an opportunity to bring great crossover content to its crown jewel multiplayer survival game, Dead by Daylight. The latest chapter will bring major characters and set pieces from the world of AMC's The Walking Dead to the game. New survivors enter the fold, as players will be able to select from two iconic Walking Dead characters. You could choose to play as Rick Grim

Topics: behaviour daryl dead rick walking

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Narwal Freo Z Ultra robot plummets to a new all-time low price

androidauthority.com Unknown 2025-08-09 23:23:34

Jonathan Feist / Android Authority Here at Android Authority, we’ve been on a quest to test all the worthy robot vacuums available, and we have a list of the best robot vacuums here. The Narwal Freo Z Ultra is the top contender, but that thing is usually really pricey! If you’ve been looking for a good deal on it, this is the best one we’ve seen so far. Buy the Narwal Freo Z Ultra for just $849.99 ($650 off) This offer is available from Amazon. That said, it’s only available to Amazon Prime su

Topics: deal freo narwal robot ultra

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Walmart Deals 2025 are live with a bunch of anti-Prime Day sales to shop now

engadget.com Unknown 2025-08-10 02:01:47

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . Amazon Prime Day is usually met with competing sales from other retailers, and this year is no different. Walmart’s summer sale is back this year, competing with Prime Day and running for an extra two days. You can shop the sale at Walmart from July 8 through July 13, snagging discount

Topics: best day deals prime walmart

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Walmart Plus membership is 50% off, and has something Amazon doesn't: the Nintendo Switch 2

zdnet.com Kayla Solino 2025-08-10 02:38:00

With Prime Day kicking off, consumers are flocking to Amazon for all the best deals. But one of the best things about Prime Day is all the other major retailers looking to cash in on the shopping palooza, offering similar (or better) deals on top products -- and even membership opportunities. Also: The best Prime Day deals live now Right now, Walmart is discounting its Walmart+ membership program by 50% ahead of its Walmart Deals event, starting on July 7 for Walmart+ members. To sweeten the d

Topics: best deal deals membership walmart

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I found an AirTag dupe that lasts twice as long (and is far cheaper with this discount)

zdnet.com Adrian Kingsley-Hughes 2025-08-10 10:20:59

ZDNET's key takeaways Ugreens Finder Tag is on sale now for $10, and the Slim Wallet Finder is available for $26. The battery in the tag for keys is purpose-built to be hard to remove, making it safer around children. They don't have the high-precision capabilities as more expensive finder tags. $16.59 at Amazon Amazon is discounting the Ugreen Smart Finder tag by 50% right now, taking the price of this AirTag alternative down to only $10. That's a dang good deal, if we say so ourselves. Als

Topics: battery finder tag wallet zdnet

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macOS 26 beta 3 features a new ‘Tahoe Day’ aerial screen saver, get it here

9to5mac.com Marcus Mendes 2025-08-10 18:14:13

Alongside today’s bug fixes and under-the-hood improvements, macOS 26 beta 3 introduces a new “Tahoe Day” aerial screen saver and wallpaper. Here’s what it looks like. New ‘Tahoe Day’ option among Landscape wallpaper selection Much like on tvOS, Apple recently introduced native video screen savers on macOS that transition smoothly into the wallpaper upon unlocking. With today’s beta seed, Apple included a new “Tahoe Day” screen saver that glides across the surface of Lake Tahoe’s rocky shorel

Topics: beta macos new tahoe wallpaper

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iOS 26 beta 3 adds new color options for default iPhone wallpaper

9to5mac.com Ryan Christoffel 2025-08-11 02:48:31

iOS 26 is launching to all users this fall, but during the summer Apple is continually refining the update through a beta process. Today, iOS 26 beta 3 arrived, and one change is an expanded array of color options for the new default wallpaper. New iOS 26 wallpaper now available in four colors Every year, iOS introduces a new default wallpaper for users. Often, that wallpaper includes several color variants. With iOS 26, previous betas only had a single blue version of the default wallpaper.

Topics: 26 beta ios new wallpaper

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My favorite accessory brand made a MagSafe wallet with FindMy built-in, and it's on sale for the first time

zdnet.com Kayla Solino 2025-08-11 06:22:08

ZDNET's key takeaways The Nomad Leather Mag Wallet is an $80 MagSafe wallet with built-in Apple Find My technology. It's sleek, holds up to four cards, is made of Horween leather, and is Qi rechargeable. It lacks storage for cash, and the four-card storage might not be enough for some. View now at Nomad Goods Nomad's new Leather Mag Wallet was just released in June. Now, it's on sale for 15% off. Here at ZDNET, we're no strangers to Nomad's top-notch accessories. The brand makes some of my f

Topics: cards leather magsafe nomad wallet

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Bitcoin Bought in 2011 Suddenly Springs to Life After 13 Million Percent Increase In Value

futurism.com Unknown 2025-08-11 22:30:38

Two Bitcoin wallets that remained untouched for more than a decade just sprang back to life — and whoever owns them is now filthy rich in crypto. As MarketWatch reports, each Bitcoin was worth just 78 cents back when the unknown buyer purchased 20,000 tokens in 2011 for just under $16,000. Due to the digital currency's inexorable rise over the subsequent years, the extremely patient owner of the two "Sleeping Beauty" wallets where the Bitcoin was stored now holds more than $2 billion worth — a

Topics: 000 bitcoin crypto wallets years

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The War on the Walkman

news.ycombinator.com Louis Anslow 2025-08-08 10:33:43

🗓️ On this day in 1979 the Sony Walkman was first released, marking its 46th anniversary The Sony Walkman is now an icon of the 1980s, eliciting nostalgia for the ‘good old days’ of owning music, rather than renting it. Affection for the device is now universal, but that wasn’t always the case… The sudden rise of headphone wearing pedestrians - spurred by Sony’s lightweight headsets (17% the weight of others) - caused unease about an unfamiliar new world quickly coming into view. Some said it

Topics: gross headphones jail new walkman

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Latest Tech News

Async I/O on Linux in databases

Microsoft mistakenly tags Windows Firewall error log bug as fixed

The best MagSafe accessories of 2025 for your new iPhone

A New Study Finds That Walking 14 More Steps Per Minute Can Support Healthy Aging

Best AirTag wallets 2025: I tested the best options to track your cards and cash

Hackers are trying to steal passwords and sensitive data from users of Signal clone

9 Best MagSafe Wallets, Tested and Reviewed (2025)

Team AA: Here are our favorite phone wallpapers

How Disneyland’s New Walt Animatronic Helps Celebrate the Past

4 ways Google Wallet can make your life easier (and more organized)

I found an AirTag dupe that lasts twice as long (and works with Android)

Charge on the go: Satechi launches new GaN wall charger and lanyard cable

My favorite accessory brand finally made a MagSafe wallet with FindMy built-in, and it's super sleek

Review: SwitchBot Wallet Finder is an incredibly useful accessory to track your wallet with iPhone Find My

Walt Disney Returns as a Surreal Animatronic for Disneyland’s 70th Anniversary

Stone–Wales Transformations

Rian Johnson Feels Fine About ‘Star Wars: The Rise of Skywalker’

The best Plex alternative in 2025 is Jellyfin, and you really should try it

Download the stock Samsung Galaxy Z Flip 7 and Z Fold 7 wallpapers here

I finally found a wall charger than can replace my AirTag when I travel - and it's still on sale (but hurry)

The Walking Dead is coming to Dead by Daylight

Narwal Freo Z Ultra robot plummets to a new all-time low price

Walmart Deals 2025 are live with a bunch of anti-Prime Day sales to shop now

Walmart Plus membership is 50% off, and has something Amazon doesn't: the Nintendo Switch 2

I found an AirTag dupe that lasts twice as long (and is far cheaper with this discount)

macOS 26 beta 3 features a new ‘Tahoe Day’ aerial screen saver, get it here

iOS 26 beta 3 adds new color options for default iPhone wallpaper

My favorite accessory brand made a MagSafe wallet with FindMy built-in, and it's on sale for the first time

Bitcoin Bought in 2011 Suddenly Springs to Life After 13 Million Percent Increase In Value

The War on the Walkman

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