performances


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Outsourcing and insourcing

A couple of days ago I had a short conversation about a company insourcing IT systems previously outsourced. IT is like other professional environments. There are strategies changing not really for technical reasons but only because they look cool according to the fashion of the moment. I.e.: the very first […]


Being a Facilitator of Chaos

As described in one of my previous posts, being a system administrator in the IT business world is not like to supervise an assembly line.A software development factory or a data center offering IT services are very complex systems with many unpredictable events to manage and control. In my personal […]


Capacity Planning: Do Know (measure) your Environment

Continues from here. As I wrote in my previous post, capacity planning for IT business is a real challenge. There are no reasons to make it harder than it already is. For this reason, you have to keep in mind that capacity planning isn’t some kind of esoteric guess, but […]


Data integrity and the Time Machine Restore 1

Information Technology is all about data. We collect raw data to build inferences on them and then store results keeping logs. We make decisions on strategical policies using data trends. We bill our customers on their service consumption data. Our bank adds and subtracts cash amount data (not bucks), etc.  […]


Bandwidth, Round Trip Trime (RTT) and Latency

In a world wide distributed computing environment, the large scale in terms of users and transactions spread over the whole planet becomes the main factor for performances.Cheap hardware availability, strengthening of CPUs and growing sizes of RAM seem still have margins of growth, on another hand, network and disk spindles […]