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Chris Evans

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Top Stories by Chris Evans

One of the benefits of delivering Infrastructure as a Service (IaaS) through the cloud is an abstraction from the underlying hardware delivering the service.  There’s no requirement to understand what technology is being used to deliver, for example, cloud servers.  The specification of a cloud-based server is based on a few simple metrics, CPU, memory and disk space. CPU or processor power is described by most vendors in terms of cores, which translate to some abstract definition of physical computing power.  Only Amazon Web Services (AWS) reference physical CPU architecture, with processing assigned EC2 Compute Units (ECUs).  You can find more details here, but summarizing, an ECU is approximately the power of a 1.2Ghz 2007 Intel Xeon Processor.  Memory is a more tangible quantity and simply expressed in megabytes or Gigabytes.  Storage references purely disk c... (more)

Storage Old, New and Past Due?

It’s been an interesting day of contrasts in the world of storage, one that shows storage is a diverse and wide ranging segment of IT. The Old Tape has been part of the discussion on the twitterverse and despite everyone’s best attempts, is not dead yet.  Tape and backup may not be seen as cool  - but data protection is an essential requirement of sustainable data management and tape still provides the one of the most cost effective methods of data protection and of course archive.  This has happened because tape continues to innovate.  Tape drive speeds and media capacities con... (more)

APIs: Essential for Delivering Storage in Enterprise Cloud Infrastructures

It’s pretty easy to pick holes in the current legacy storage products, especially when it comes to integration within both public and private cloud deployments.  However it’s worth discussing exactly what is required when implementing cloud frameworks, as the way in which storage is deployed is radically different from the traditional model of storage operations.  In this post we will look at why traditional methods of storage management need to change and how that affects the way in which the hardware itself is used.  This leads to a discussion on APIs and how they are essential... (more)

How Viable Is Cloud Storage?

This week has seen announcements from two companies I’ve been interested in and following for some time. Nasuni Nasuni makes a storage appliance that stores all of a customer’s data in “the cloud”.  It’s available either as a physical device (effectively a server running their software) or as a virtual machine.  What makes their product interesting is that both the data and filer configuration reside on the cloud and can be reconstituted anywhere if for some reason the filer is lost (for example if the appliance is down or power was lost).  The only piece of data the customer ne... (more)

Amazon Delivers Cloud Archive Storage with Glacier

At the end of August 2012, Amazon Web Services released their latest service offering – a long-term archive service called Glacier.  As a complement to their existing active data access service S3, Glacier provides long term storage for “cold” data – information that has to be retained for a long time but doesn’t require frequent access. What Exactly is Glacier? Many organisations need to retain data in archive format for extended periods of time.  This is for regulatory or compliance purposes or may simply be part of their normal business process.  Good examples are medical, h... (more)