Skip to main content

Erase HDP 2.x and Ambari

Image
By
Listen:
Struggling with delivery, architecture alignment, or platform stability?

I help teams fix systemic engineering issues: processes, architecture, and clarity.
→ See how I work with teams.


Since I hack now often with Hortonworks HDP, I also often need to completely clean out my lab environments to get fresh boxes. I figured to write a ugly shell script is more comfortable as bothering my infra guys to reset the VM's in Azure - which also reset all my modifications. Bad!

Anyhow, here's the script in the case anyone has some use, too.

https://github.com/alo-alt/shell/blob/master/rmhdp.bash

As usual, first stop all Ambari managed services. I remove Postgres too, since the setup of a new db done by the installer of Ambari is much more faster than dealing with inconsistencies later.

Side Note: The script is made for RHEL based distributions ;)


If you need help with distributed systems, backend engineering, or data platforms, check my Services.

Labels:

Popular posts from this blog

Why Is Customer Obsession Disappearing?

By
Summary: Many companies trade real customer-obsession for automated, low-empathy support. Through examples from Coinbase, PayPal, GO Telecommunications and AT&T, this article shows how reliance on AI chatbots, outsourced call centers, and KPI-driven workflows erodes trust, NPS and customer retention. It argues that human-centric support—treating support as strategic investment instead of cost—is still a core growth engine in competitive markets. It's wild that even with all the cool tech we've got these days, like AI solving complex equations and doing business across time zones in a flash, so many companies are still struggling with the basics: taking care of their customers. The drama around Coinbase's customer support is a prime example of even tech giants messing up. And it's not just Coinbase — it's a big-picture issue for the whole industry. At some point, the idea of "customer obsession" got replaced with "customer automation,...
Read more

MySQL Scaling in 2024

By
When your MySQL database reaches its performance limits, vertical scaling through hardware upgrades provides a temporary solution. Long-term growth, though, requires a more comprehensive approach. This involves optimizing the database strategically and integrating complementary technologies. Caching The implementation of a caching layer, such as Memcached or Redis , can result in a notable reduction in the load and an increase ni performance at MySQL. In-memory stores cache data that is accessed frequently, enabling near-instantaneous responses and freeing the database for other tasks. For applications with heavy read traffic on relatively static data (e.g. product catalogues, user profiles), caching represents a low-effort, high-impact solution. Consider a online shop product catalogue with thousands of items. With each visit to the website, the application queries the database in order to retrieve product details. By using caching, the retrieved details can be stored in Memcached (a...
Read more

What the Heck is Superposition and Entanglement?

By
Summary: This article explains superposition and interference in simple, intuitive terms. It describes how quantum states combine, how probability amplitudes add, and why interference patterns appear in systems such as electrons, photons and waves. The goal is to give a clear, non mathematical understanding of how quantum behavior emerges from the rules of wave functions and measurement. If you’ve ever heard the words superposition or entanglement thrown around in conversations about quantum physics, you may have nodded politely while your brain quietly filed them away in the "too confusing to deal with" folder.  These aren't just theoretical quirks; they're the foundation of mind-bending tech like Google's latest quantum chip, the Willow with its 105 qubits. Superposition challenges our understanding of reality, suggesting that particles don't have definite states until observed. This principle is crucial in quantum technologies, enabling phenomena li...
Read more