Ceph monitor status switching due to slow IOs

I deployed a Ceph cluster (Nautilus, then upgraded to the Octopus release) to store my personal data a few months ago. So far it has been working pretty well, apart from a 1 hour partial outage that won't be covered there, most probably linked to the issue described.

That said …

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Attempting to mine Cryptocurrency with an old machine

This is the story of me attempting to convert an old machine into a Cryptocurrency miner. I basically tried to plug my AMD Radeon RX 480 graphic card into an old PC, a Core 2 duo with 4GB RAM and a GF7050T-M5 motherboard.

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AMD RX 480 GPU OpenCL benchmark

This post summarizes the results of my AMD GPU benchmark code to benchmark the computing power of an AMD Radeon RX 480 GPU against an Intel Core i5-7400 CPU.

The benchmarking code I am running on is the following code:

__kernel void kerntest(__global char* data, int loops_cnt) {
  size_t id …
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Installing a Vanilla Linux Kernel on Fedora

Updated on 2017-12-28

Installing a Vanilla Linux Kernel on Fedora is quite simple (once one knows how to do it..)

Configuring & Building Linux

One can start by cloning Torvalds' Linux repository to fetch the latest master (or we could fetch the latest stable release) :

$ git clone https://github.com/torvalds …
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A couple of statistics about Linux kernel documentation

There is a whole lot of files in the Documentation directory of the Linux kernel source. Is it possible for a single person to read the whole documentation ? Let's have a look at what's inside it.

$ pwd
/home/florent/src/linux/linux-4.10/Documentation

$ find . -type f | wc -l
5118 …
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