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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)

HP Cloud Now Available In Beta – A First Look

HP have joined the Infrastructure as a Service (IaaS) market and released their HP Cloud service in public beta.  Here’s the announcement press release.  The services on offer are: Available Now as Public Beta Compute – on-demand server instances. Cloud Object Storage – object-based storage using RESTful APIs. Content Delivery Network – local distribution of web content. Still in Private Beta Cloud Block Storage – persistent data for compute images Relational Database for MySQL – managed cloud databases There’s also the HP Identity Service for managing key & token access managem... (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)

The Evolution of Solid State Arrays

In the first wave of solid-state storage arrays, we saw commodity style SSDs (solid state drives) being added to traditional storage arrays. This solution provided an incremental benefit in performance over spinning hard drives, however the back-end technology in these arrays was developed up to 20 years ago and was purely focused around driving performance out of the slowest part of the infrastructure – the hard drive.  Of course SSDs are an order of magnitude faster than HDDs so you can pretty much guarantee SSDs in traditional arrays results in underused resources, but is prem... (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)