Recently while working with one of the databases I came across a method that is widely used by many databases to take a snapshot of the memory into a disk. One of the most famous that you have heard of is Redis. The method is called copy on write. Let’s see what is a copy
In this article, we are going to start learning system programming by first of all creating a copy program like cp using low-level IO functions and not the standard IO functions. Now first let’s see what is system programming and what is low-level IO functions in C. System Programming: System programming aims at producing software
BPF also known as Berkeley Packet Filters was introduced first in 1992 by Steven McCanne and Van Jacobson in their paper The BSD packet filter: A New architecture for user-level packet capture. In this paper, they presented about BPF architecture and how it interfaced with the rest of the system and a new mechanism for
Monitoring is very important when you want your systems to work properly. Monitoring helps you identify the issues while they are happening or before them. So it is very important to implement your monitoring properly. Let’s see what is black box monitoring. Now when you see any issue how you should approach your debugging. First
In linux environment when you run any piece of code, any application or software. The piece of code actually maps to the some set of instructions in kernel level. To see those instructions that are being executed for that piece of code we can use this tool called strace. We will see what system calls
Recently I came to know about the runlevels in linux while going through initd. So I thought of writing about it and here it is what are runlevels in linux systems? Run-levels are the mode in which you unix system boots up. These modes can be from single user with no networking to full fledge
Linux is a very powerful Operating system and it has many flavors. Its always your choice which one to use but making them work faster and according to your need is something you will need. Here we will talk about alias and write a simple alias file to help you be more productive.Lets see how
When it comes to servers it is really important to keep track of memory, cpu utilization, which processes are taking what amount of CPU, what process are orphan processes etc. All these are required to take necessary step like kill a process if it is taking a lot of CPU or trigger autoscaling when CPU
Linux is always tough for newbies but trust me if you treat linux more than OS at the initial stages, you will be so intimated by its power that you may not get use to it easily. So my suggestion linux is just an operating System. Linux is one of the must to know things