https://tabsoverspaces.com/feed.xml

Wow, time flies. This week Techorama in Antwerp is going to happen. And I’m looking forward to medieval edition. I was lucky and 2 of my sessions were selected.

It’s been almost a year since I put my NTP server on the public internet. Since then I’ve changed a few things, so I’m due for a write-up.

Příští týden ve čtvrtek, 30. dubna, se koná GitHub Copilot Dev Days 2026 v Praze. I já přispěju trochu do mlýna s tématem Jak jsme začali používat Copilot v dotnet/runtime.

Tento týden v pátek, 17. dubna, se koná Global Azure 2026 v Praze. I já přispěju trochu do mlýna s tématem Cloud design patterns for better architecture (even without cloud).

Over the last couple of years, I’ve spent a lot of time studying, experimenting, and learning about clocks, NTP, PTP, and time synchronization in general. It’s a fascinating area that brings together software, hardware, math, and networking – and I’ve thoroughly enjoyed going down this rabbit hole.

Step forward for FbNetExternalEngine today – version 7.0 is ready, you can go and download it right now.

I’m very excited to be speaking at the Adriatics Tech Summit 2026 in about two weeks. It will be my first time speaking there, so I’m both thrilled and a little nervous.

I was today years old when I discovered DnsEndPoint. How is it possible that I never came across it in over two decades of working with .NET?

I run my personal AS 215777 and as part of learning – and because I consider BGP security important – I wanted to start validating routes using RPKI. Here’s steps I did to enable it on RouterOS 7.21.

While working on a PR in Microsoft.Extensions.Logging I saw two variations of code and I wanted to check which one is faster. Not that it mattered in this piece of code, but every little counts and also, I like to explore random things.

Assume you have some numbers (zero-based) that represent predefined strings. And you want to convert those numbers.

I’m excited to announce the release of Entity Framework Core 10 provider for Firebird.

I recently spent great amount of time dealing with the error Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/foo/bar/data.json" to rootfs at "/app/data.json": mount src=/foo/bar/data.json, dst=/app/data.json, dstFd=/proc/thread-self/fd/11, flags=MS_BIND|MS_REC: not a directory: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type. I guess I’ll share and maybe this will save some time to somebody.

WUG Days jdou i letos do Prahy. Jedna moje session byla vybrána, takže se společně podíváme na parameterized collections v EF Core.

As I’m running my time.cincura.net timeserver I have some monitoring in place. But one thing was missing: checking the certificate for NTS. Although the renewal is semi-automated, having an additional layer of verification provides peace of mind. The challenge is that most monitoring tools do not support NTS, so I decided to create my own tool – which you can now use as well.

Už za dvacet dní, přesně, se bude konat CODECON #Žilina. Nikdy jsem na této konferenci nebyl, ale Žilina je rozhodně město, které mám rád. A když vidím, na jakých místech se akce koná, nemůžu se dočkat. Moje session je How I put .NET into Firebird database engine. Ano, název je v angličtině (protože jsem hlupák a nedošlo mi, že CfP můžu vyplnit v češtině), ale jinak vám vše samozřejmě řeknu v češtině.

In about two weeks a .NET Developer Conference is going to happen in Köln. I’ll have one session Autoincrement (identity) is not the only option for primary keys.

We’re close to that time of year – time of .NET DeveloperDays in Warsaw. I’m really excited to be there, so let’s talk about what you can listen to from me.

Následující týden se koná, dneska už tradiční dvojboj konferencí, WUG Days a SQL Server Bootcamp v Brně. A tak jako obvykle, připravil jsem několik přednášek.

I have a small .NET application that manages some specific parts of my Software Defined House aka Smart home. Recently, I decided to transition from Application Insights and I found an unexpected behavior when using pure Open Telemetry exporter.

Ever since I started building my homelab and started playing with networking I wanted to give something back. Something that’s a valuable service. And although I’m self-hosting a bunch of my websites and providing data from my weather stations publicly, it was not it. Until I stumbled upon timekeeping and time servers.

Next week Techorama in Antwerp is going to happen. And I’m looking forward to all-star sports edition. I was lucky and 2 of my sessions were selected.

I was writing some code in EF Core’s codebase and saw different way of writing condition on nullable bool.

Příští týden se bude konat Gopas TechEd. Letos jsem připravil 3 přednášky.

I’m excited to announce the release of Entity Framework Core 9 provider for Firebird.

Purely out of curiosity I decided to test latencies to a few Azure datacenters around me. Specifically, Germany West Central (Frankfurt), Poland Central (Warsaw) and West Europe (Amsterdam). I wanted to test Azure DC in Austria as well, but it is not yet available.

In couple of days Techorama in Utrecht is going to happen. This year’s theme is funfair. This I was lucky and 2 of my sessions were selected.

We are couple of weeks from .NET DeveloperDays 2024. Really excited to be there. My main “show” there is going to be Mastering Entity Framework Core workshop.

Tento týden se koná, dneska už tradiční dvojboj konferencí, WUG Days 2024 a SQL Server Bootcamp 2024 v Brně. A tak jako obvykle, připravil jsem několik přednášek.

I’ll be speaking this Thursday about Tips and tricks for VS debugger in Vienna for DotNetDevs.at. You can register here.

One of my favourite conferences – .NET Developer Days – that happens in Warsaw in fall is now having also a Berlin edition. And I’m a big fan of Berliner Fernsehturm. Looks like a perfect combination (well, perfect combination would be to have the conference in Fernsehturm 😉). Anyway, I’ll have two sessions there and I hope to see you there.