Sever management

Hangwatch – the watcher and the actor, all rolled into one.

Published on : May 7, 2019 by

Hangwatch – the watcher and the actor, all rolled into one.

NMI Watchdog is something you would have heard of. NMI or Non Maskable Interrupt, is a type of interrupt which the CPU cores canʼt ignore. Other type of interrupts, can be routed to different CPUs depending on its workload, while a NMI interrupt canʼt be passed on and has to be handled by the CPU […]

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SysAdmin Series – What is proc-buddyinfo?

Published on : May 4, 2019 by

SysAdmin Series – What is proc-buddyinfo?

Primary memory or Linux is not considered as a single block by Linux Kernel. Instead it is fragmented or may be a better word here would be divided or differentiated into different zones inside nodes. Zones can vary depending on the architecture. We will be considering only 64 bit for learning purposes. Nodes are how […]

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SysAdmin Series – What does ksoftirqd do ?

Published on : April 29, 2019 by

SysAdmin Series – What does ksoftirqd do ?

Operating System manages and controls I/O operations and I/O devices. Let’s have a quick overview of different ways of interacting with I/O devices, before we go through what a ksoftirqd does. Interrupts – The CPU issues commands to the I/O module then proceeds with its normal work until interrupted by I/O device on completion of […]

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cPanel: Find Duplicate Domains in Servers

Published on : April 24, 2019 by

cPanel: Find Duplicate Domains in Servers

One of our client needed to enable DNS cluster for his web servers. Before enabling cluster we have to make sure there are no duplicate accounts in the server. In many cases, accounts were migrated across the servers and the previous ones were not deleted. So, when enabling the cluster, the DNS of the first […]

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How to take RDS Snapshots using Lambda?

Published on : April 22, 2019 by

How to take RDS Snapshots using Lambda?

Amazon Relational Database Service (Amazon RDS) is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizable capacity and can manage common database administration tasks. If your site/application stores its sensitive data in the database, you will definitely want to back up […]

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