Summary This page documented the investigation of an issue: MongoDB Pod failed to lock mongod.lock on OpenShift/OKDv4. The problem was because NFSv3 was used to mount between OKDv4 Worker Nodes to the NFS server. MongoDB used internally flock/fcntl to lock the mongod.lock file descriptor. In a network file system like NFSv3, locking support was required … Continue reading MongoDB failed to lock file on OpenShift using NFS file system
Author: genzerhawker
The Collector’s Fallacy – Zettelkasten Method
On researching taking notes, speciffically the Zekkelkasten method, I learned The Collector's Fallacy. In its essenses: Saving links, copying or just reading a material does not mean that you have consumed the knowledge. You may have increased the knowlege for a short time, but it will fade away very soon after that. By taking notes, … Continue reading The Collector’s Fallacy – Zettelkasten Method
Goes back quicker in Terminal
When I was working on a Terminal, I used to type lots of cd and cd .. to go back and forth the directory. Too often, when I went to deep into the directory hierarchy, I got to type multiple times cd .. just to move up to parents, or a long command like cd … Continue reading Goes back quicker in Terminal
Less well-known uses of curl
When it comes to make HTTP calls, I always use curl as it is a ubiquitous tool for the job. Today, I discover that I can use curl for some other tasks. copying files curl supports the FILE protocol (file:/), therefore it is possible to "download" a file: $ curl file:/path/to/some/large/file -o /the/destination/file % Total … Continue reading Less well-known uses of curl
Convert Git to Git LFS
There are some Git repositories in the company contain mostly binary files (Words, Excel, PDFs, etc). As Git is not designed to track binary files effectively, eventually the repository ends up pretty large (over 2GB) and will become a PITA on git clone. In order to effectively solves this, switching a regular Git to Git … Continue reading Convert Git to Git LFS
Grokking Hard 