DRS, Distributed Resource Scheduler

VMware DRS (Distributed Resource Scheduler), sums up computing capacity across a collection of servers and is allocated to the VM’s based on its needs and requirements. This allows the VM’s to recieve the resources dynamically, when it is required. If in case a VM experiences an increase in load, DRS automatically allocates additional resources, without affecting other VM’s. This is done by continous monitoring of resources by VMware DRS.
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How FT Works?

FT or Fault Tolerance, provides continuous availability for the protected virtual machines, in the event of a VM/hardware failure. It ensures zero downtime preventing data loss and here’s where FT differs from HA. This is done by creating a live shadow instance of a VM (running on another host), referred as the Secondary VM, that is always up-to-date with the original VM, referred as the Primary VM. FT works as below:

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Could not add object property – Icinga Error

Sharing this bit of information to help someone who is worried with this same error. While configuring or modifying Icinga, you may experience an issue like

Warning: Duplicate definition found for host ‘env_servers’ (config file ‘/etc/icinga/conf.d/hostgroups.cfg’, starting on line 19)
Error: Could not add object property in file ‘/etc/icinga/conf.d/hostgroups.cfg’ on line 20.
Error processing object config files!
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Windows Task Scheduler Error 2147943730 Reported

We all might have used task scheduler in Windows. It is a simple job to create a scheduled task. But I experienced an unexpected error, while scheduling. As you can see in the image below, it doesn’t gave me an idea on what the real issue is. Googling doesn’t displayed helpful results except for an article. This article will give you an idea on how to find the real issue, if ever you find such errors with task scheduler.

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Load Balancer – An Overview

Load balancer is a device that distributes network or application traffic across a number of servers. This improves application capacity and reliability.
Load balancer decreases burden on servers, thereby improving the overall performance of application. Before looking into how load balancer works, we will
meet some terminologies that might be useful. And for this, we will consider f5 load balancer.

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