GitHub announced a new redundancy-based technology built on core git version control techniques for a more reliable, highly available and performance oriented storage to repositories – DGit. While git is distributed by design (any copy of a repository contains the entire history), it doesn’t support mirroring by itself. DGit stores the data of each repo in 3 different servers. Continue reading DGit: GitHub’s distributed, sw-defined storage
When I was studying Computer Science in an engineering institution in India 15 years earlier, there weren’t too many resources to check out. Lab computers were shared in tiny slots. They were tortoises compared to today’s regular smartphones. We accessed internet on a 64Kbps modem. Most of the academic subjects were studied by referring the text and a little bit of hands-on development. For many students, these didn’t reflect well on their careers. Continue reading Introducing dslib: academic data structures library
If you are a developer you must have come across StarUML at some point or another. It is a very old and popular UML modelling software. However, for years, it was available only for Windows. Hunting for a good alternative we just noticed that StarUML has a native Linux client for almost a year now! However, from the Google search results it seems there wasn’t enough noise. Continue reading StarUML is available for Ubuntu
After Ethernet and Wi-Fi, scientists have come up with Li-Fi. The working principle is very simple: blinking LED lights can work as signals with different meanings and the signals can be fed into a bunch of LED lights by a single controller. Continue reading Li-Fi: data transmission via light
The Linux kernel supports 4 I/O schedulers for disks:
Deadline: minimizes disk seeks in order to provide best possible response time Default on Ubuntu.
Anticipatory: Adds an anticipation heuristic on top of deadline I/O scheduler. It spends a few milliseconds in anticipation that new requests in the same area might appear. However, if there are no further requests, the time is wasted in waiting. Not very common.
Completely Fair Queueing: Assigns the requests to multiple queues based on the process requesting the I/O. Services the queues round-robin. Default on RHEL.
We wrote about the risks of using cloud based password managers in an earlier article. To speak the truth, password managers installed locally on your system are not safe either, IF the system is compromised. KeeFarce is a new tool that proves the point. However, the principles of KeeFarce work only when you are allowing it to run on your system. Continue reading KeeFarce: extract KeePass secrets at runtime
Did you ever encounter a situation where you need to share a directory which multiple users can access and create files in, but can’t delete each other’s files? Sounds familiar? We are talking of the Restricted Deletion Flag aka Sticky Bit. Continue reading Restricted Deletion Flag