From the Chief Technology Officer at Marathon Technologies

Jerry Melnick

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Top Stories by Jerry Melnick

One of the promises of server virtualization is improved high availability and more efficient disaster recovery. But according to the Enterprise Strategy Group (ESG) to achieve these goals with virtualization requires the modification of existing processes. It also requires looking beyond the virtualization vendor's HA and DR products to achieve SLAs for all workloads. Mark Bowker and Lauren Whitehouse, analysts from ESG, recently put together an exclusive report on this topic called “Business Resilience in Virtual Environments” that explores: • The advantages and challenges of server virtualization for improved business resiliency • The limitations of the virtualization platform vendor's offerings for HA and DR • Misconceptions about common business resiliency terms such as high availability, fault tolerance and disaster recovery • How to use a combination of thir... (more)

Understanding XenServer HA

Following the XenServer HA announcement, we’ve been approached with questions like “How exactly does XenServer HA work?” and “How does XenServer HA and everRun VM work together.” Rather than respond ourselves we thought it would be best to point to a few fellow bloggers who have already answered these questions. First, here’s a good post written by Anil Madhavapeddy at Citrix discussing how the overall architecture of XenServer HA works. Second, Scott Lowe has put together a great summary of why Citrix and Marathon worked together to develop XenServer HA. If you want more detai... (more)

How Virtualization is Changing the Way We Think About Availability

Analyst firm The 451 Group has just released some very interesting findings about virtualization and availability in a recent report by Chief Analyst John Abbott. Some of the key take-aways include: • Virtual infrastructure can form the basis of fully automated availability processes. Availability becomes a default property of the virtual machine. • ‘Dial up’ levels of availability can be implemented, depending on the requirements of specific applications or departments. • If a system restore is required after a disaster, it’s usually much easier and much quicker to restore a virt... (more)

Three Steps to Better ROI from Server Virtualization

There are at least three straightforward steps that best practices companies are implementing to achieve aggressive costs savings with their server virtualization initiatives. I'll be reviewing these three steps in more detail, along with customer use cases, in a webinar on August 19th, "How to Get at least 2x Greater Cost Savings from Server Virtualization." To register for the webinar, go to: https://www1.gotomeeting.com/register/72241968 1. Expand Ratio of Virtual Machines to Physical Hosts - One of the simplest steps companies are taking to realize larger cost savings from ser... (more)

Q&A: Windows Server High Availability

Thanks again to those who joined us for last week’s webinar, "Windows Server 2008 High Availability: Technology Comparison." The on-demand recording of last week's webinar is now available to watch at your convenience (here). We had a lot of good questions from our attendees during the Q&A portion of the webinar, which are summarized below. Q: How do you determine when to use an HA solution vs. a DR solution? When it comes to availability vs. recovery, the most important question to ask is what are your recovery time objectives (RTO)? What is the amount of time your application c... (more)