VMware Distributed Resource Scheduler

As we’ve discussed in previous posts, VMware can ensure uptime in the event of a hardware failure via its High Availability (HA) feature. HA detects when a VMware ESX host fails, and uses vMotion to move the virtual machines (VMs) on the failed host to an available host in the cluster. However, HA does not monitor VM performance and will not move VMs to a different host if they would perform better on that host. That’s where VMware’s Distributed Resource Scheduler (DRS) comes in.

Posted on: 22 June 2017 | 10:30 am

Server Performance Analysis Techniques

IT is tasked with resolving a variety of server performance issues; the techniques used to address the problems vary greatly depending on the nature of the issue. 

Posted on: 14 June 2017 | 10:31 am

Server Monitoring and Alerts - Getting past common obstacles

The technology stack continues to increase in both breadth and complexity, to the point where automated server monitoring and alerting is the only way IT organizations can effectively function.

Posted on: 8 June 2017 | 10:30 am

Monitoring for Availability

You’ve set up server monitoring, and your CPU, memory and disk I/O values are all within baselines. The server responds to a ping, and your web services are all running.  But when you try to pull up your company’s home page, you get a “

Posted on: 1 June 2017 | 2:21 pm

How to Monitor Server Performance

Server performance monitoring can be somewhat of an artform, especially as the server infrastructure and the surrounding network become increasingly dispersed and

Posted on: 25 May 2017 | 8:14 am

VMware – High Availability and Fault Tolerant Cluster Configurations

While virtualizing servers with VMware has the advantage of minimizing hardware monitoring requirements and saving on facilities costs, it does have the disadvantage of introducing a single point of failure for multiple servers:  the ESX host computer.  One hardware failure taking out an ESX host can take out all the Virtual Machines (VMs) on that host, rather than taking out one individual server.

Posted on: 22 May 2017 | 8:31 am

Configuring and Collecting Syslog

What is Syslog? Syslog is the message logging utility used on Unix, Linux and Network Device operating systems (e.g. Cisco, Juniper).  

Posted on: 18 May 2017 | 2:38 pm

Uptime Monitoring –  Calculating cost and ROI

Why: As an Information Technology professional, you have in all likelihood experienced an IT disruption that has affected application and server uptime. Information Technology is very much a metrics driven profession.  

Posted on: 11 May 2017 | 10:42 am

Linux Memory Use

Monitoring memory on Linux can be counter-intuitive if you’re accustomed to monitoring Windows.  On Windows, 95% used memory means that 95% of your memory is assigned to processes, and allocating memory for a new process will slow down performance as memory is swapped out to disk to free up enough memory for the new process.

Posted on: 4 May 2017 | 1:29 pm

Configuring Longitude to Monitor Servers and IT Infrastructure

The monitoring of servers and the network infrastructure need not be a daunting task.As the number of servers and network devices continue proliferate a common theme from many IT professionals is  “How do I best monitor for performance and availability issues and do it in a way that isn’t time consuming?” 

Posted on: 25 April 2017 | 7:46 am