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ayende

Re:Designing APIs for Agents on Wednesday July 15, 2026 @06:25PM (#48927931)
> Defaults are bad. Agents can be expected to read the documentation, register what good starting values are, and fill them all in, in place.

That is pretty bad, when you now need to look at this code, and you have 95% of the output being craft, but sometimes it isn't, and you need to understand the difference between each.

A great example of that is:

    int fd = open("log.txt", O_RDONLY);

Versus:

    // 1. Manually build and initialize the Security Attributes structure
    SECURITY_ATTRIBUTES sa;
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.lpSecurityDescriptor = NULL; // Explicitly no custom security descriptor (inherits default)
    sa.bInheritHandle = FALSE;       // Explicitly state this handle cannot be inherited by child processes

    // 2. We need a handle for the template file parameter. 
    // Win32 requires this to be an active file handle opened with GENERIC_READ, or explicitly INVALID_HANDLE_VALUE.
    HANDLE hTemplateFile = INVALID_HANDLE_VALUE; 

    // 3. Now we call CreateFile with every single parameter fully populated
    HANDLE hFile = CreateFile(
        "log.txt",                 // 1. lpFileName: The file we want to open
        GENERIC_READ,              // 2. dwDesiredAccess: Read-only access
        FILE_SHARE_READ,           // 3. dwShareMode: Prevents any other process from writing to it
        &sa,                       // 4. lpSecurityAttributes: Pointer to our explicitly defined struct
        OPEN_EXISTING,             // 5. dwCreationDisposition: Only open if it already exists
        FILE_ATTRIBUTE_NORMAL,     // 6. dwFlagsAndAttributes: Normal file, no special caching or async flags
        hTemplateFile              // 7. hTemplateFile: Passing our explicit invalid handle instead of NULL
    );
An agent can output the second just as well, sure. However... which one do you think is better to read or understand?

Did you catch the fact that this is blocking concurrent writers? Or that we expected the file to exist?

Or what about:

    HFONT hFont = CreateFont(
        12, 0, 0, 0, FW_NORMAL, TRUE, FALSE, FALSE, 
        DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, 
        DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, "Arial"
    );
Versus:

    const char* fontPath = "/usr/share/fonts/truetype/msttcorefonts/arial.ttf";
    FT_New_Face(library, fontPath, 0, &face);
    FT_Set_Pixel_Sizes(face, 0,16  );
Same thing, but actually understanding what is going on is orders of magnitude different.
Re:Anthropic is expanding to Colossus2. Will use GB200 on Thursday May 21, 2026 @07:19AM (#48220803)
Nevertheless, you are still talking about 15B / year - when the initial investment was < 30B. That investment also probably covers things like power, salaries, etc.

So you are still covering all of that.

Re:What Does a Database for SSDs Look Like? on Saturday December 20, 2025 @10:48AM (#46336982)
All financial systems don't care about time.

Prety much all financial transactions are settled with a given date, not instantly. Go sell some stocks, it takes 2 days to actually settle. (May be hidden by your provider, but that how it works).

For that matter, the ultimate in BASE for financial transactions is the humble check.

That is a great example of "money out" that will only be settled at some time in the future.

There is a reason there is this notion of a "business day" and re-processing transactions that arrived out of order.

Re:What Does a Database for SSDs Look Like? on Saturday December 20, 2025 @10:43AM (#46336952)
Committing to NVMe drive properly is really costly. I'm talking using O_DIRECT | OSYNC or fsync here. Can be in the order of whole milliseconds, easily. And it is much worse if you are using cloud systems.
Re:Rust GCC back end: Why and how on Tuesday December 16, 2025 @08:59AM (#46288546)
Isn't that very much intentional on the part of GCC?
That suffer from a serious issue

You must have the data upfront, you cannot build this in an incremental fashion

There is also bo mention on how this would handle updates, and from the description, even if updates are possible, this will degrade over time, requiring new indexing batch

Re:Why is Zig so Cool? on Saturday November 08, 2025 @06:03AM (#45855831)
Not this is explicitly marked as Not Planned
Re:The Case Against PGVector on Monday November 03, 2025 @10:48AM (#45800352)
> maintenance_work_mem

That kills the indexing process, you cannot let it run with limited amount of memory.

> How do you think a B+tree gets updated?

In a B+Tree, you need to touch log H of the pages. In HNSW graph - you need to touch literally thousands of vectors once your graph gets big enough.

Re:Linux VM Without VM Software – User Mode Linux on Tuesday October 28, 2025 @06:03AM (#45730981)
Probably avoid zero write optimizations. This force actual allocation of disk space for the data, instead of pretending to do so.
Re:AWS Service Availability Updates on Monday October 13, 2025 @05:33PM (#45573571)
Amazon Glacier on the list is a pretty big surprise to me.
Re:The email they shouldn't have read on Wednesday October 08, 2025 @05:59PM (#45521094)
That isn't spying. That is called doing code review on a shared depenendcy
Re:Improved Gemini 2.5 Flash and Flash-Lite on Friday September 26, 2025 @01:39AM (#45383055)
OpenAI, Ollama, DeepSeek all do that.

And wanting to programmatically work with the result + allow tool calls is super common.

Re:Rails on SQLite: new ways to cause outages on Friday September 12, 2025 @02:26AM (#45219191)
Even with very small number of requests - what happens when you have two concurrent ones?
Re:Memory is slow, Disk is fast – Part 2 on Friday September 05, 2025 @01:57AM (#45135399)
This is wrong, because your mmap code is being stalled for page faults (including soft page faults that you have when the data is in memory, but not mapped to your process).

The io_uring code looks like it is doing all the fetch work in the background (with 6 threads), then just handing the completed buffers to the counter.

Do the same with 6 threads that would first read the first byte on each page and then hand that page section to the counter, you'll find similar performance.

And you can use both madvice / huge pages to control the mmap behavior

Another way to do that is to look at the tech empower benchmarks. It tests on big machines, but you can get > 1 M req/sec across a wide variety of environments.
Re:AI models need a virtual machine on Saturday August 30, 2025 @11:59AM (#45075710)
That is the wrong abstraction to think at. The problem is not _which_ tools you give the LLM, the problem is what action it can do.

For example, in the book-a-ticket scenario - I want it to be able to check a few websites to compare prices, and I want it to be able to pay for me.

I don't want it to decide to send me to a 37 hour trip with three stops because it is 3$ cheaper.

Alternatively, I want to be able to lookup my benefits status, but the LLM should physically not be able to provide me any details about the benefits status of my coworkers.

That is the _same_ tool cool, but in a different scope.

For that matter, if I'm in HR - I _should_ be able to look at the benefits status of employees that I am responsible for, of course, but that creates an audit log, etc.

In other words, it isn't the action that matters, but what is the intent.

LLM should be placed in the same box as the user it is acting on-behalf-of.

Re:Buypass Discontinues Issuance of TLS/SSL Certificates on Monday August 25, 2025 @05:18PM (#45019153)
FWIW, I once got a cease and desist letter because "company-xyz" found that we were using a subdomain "company-xyz.customers.our-service.com".

They discovered that because they were monitoring the CT logs. And they were concerned about trademark issues. It ended up being one of the teams in "company-xyz" that had opened an account (under the company name, of course).

But that is just a small note that people _are_ monitoring those.

Re:Buypass Discontinues Issuance of TLS/SSL Certificates on Monday August 25, 2025 @05:16PM (#45019138)
If you are checking the cert logs, it is a very tiny bit to validate the key as well. If you aren't checking... well, that isn't a concern anyway, now is it?

And the whole _point_ of the cert transparency log is that it only take _one_ such instance to ruin the credibility of a CA.

The fact that you do that in the public, and that it is _forever_, make it very hard to do in the shadows.

Re:Buypass Discontinues Issuance of TLS/SSL Certificates on Monday August 25, 2025 @06:53AM (#45012481)
Sure you can, you know what your public key _should_ look like
One thing that is ignored here is that for crypto, there are additional concerns

For example, are the instructions cost depend on the data? If so, you have a timing leak and a hole in your system

One of the reasons to use assembly is specifically to avoid timing dependency and the compiler being "smart" about things and thus leading to timing attacks

Human accountants also have a very important property: liability.

If a certified accountant told me to do X, I'm covered (at least to the point they would assist in recovering, or I can get compensation through their insurance). If LLM tells me, I'm in a bigger problem.

Re:Why English doesn't use accents on Sunday July 06, 2025 @06:51PM (#44484851)
French was the lingua franca for a very long time (pun intended)
Re:AI Saved My Company from a 2-Year Litigation Nightmare on Tuesday June 10, 2025 @07:01AM (#44235246)
The interesting question - if the AI is provided via my lawyer's office - is there privilege in this case?
Too likely that this would not work because silent conversion to number along the way

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