From the article:

When it comes to file systems, Linux® is the Swiss Army knife of operating systems. Linux supports a large number of file systems, from journaling to clustering to cryptographic. Linux is a wonderful platform for using standard and more exotic file systems and also for developing file systems. This article explores the virtual file system (VFS)—sometimes called the virtual filesystem switch—in the Linux kernel and then reviews some of the major structures that tie file systems together.

More here.


From the article:

CHICAGO — At the Data Center Decisions conference in Chicago on Monday, Oct. 22, controversial comments from Jon Toigo, CEO and managing principal of Dunedin, Fla.-based Toigo Partners International LLC, had attendees shaking their heads in bewilderment.

For one, Toigo advised attendees against using VMware in favor of mainframe systems, calling the virtualization software “shoddy” in comparison. But nearly all conference attendees were assembled to learn about implementing virtualization in their data center.

Toigo is knowledgeable about disaster recovery (DR) planning, which was the topic of his keynote session, but he warned users against ever feeling completely secure with their disaster recovery plans.

More here.

Sick of hearing about “Green” yet? Better learn to deal with it, “Green”‘s drumbeat is really just beginning and it’s not just a fad, it’s something that fits a condition we have in IT, and it’s a way to get more money and headcount for managers, so listen up.

What is “Green” computing? Here’s as good a definition as I could find, click through for more from Techtarget.

Green computing is the environmentally responsible use of computers and related resources. Such practices include the implementation of energy-efficient central processing units (CPUs), servers and peripherals as well as reduced resource consumption and proper disposal of electronic waste (e-waste).

One of the earliest initiatives toward green computing in the United States was the voluntary labeling program known as Energy Star. It was conceived by the Environmental Protection Agency (EPA) in 1992 to promote energy efficiency in hardware of all kinds. The Energy Star label became a common sight, especially in notebook computers and displays. Similar programs have been adopted in Europe and Asia.

How “Green” is your office environment? Take the Greening the Cube Farm quiz and see!

Last but not least, is buying “Green” storage for business continuity, disaster recovery and archival enough? Not nearly enough, according to the marketing director of Overland Storage.


A new Aberdeen Group study reports that as Virtualization keeps expanding both in it’s role in the datacenter and as a tool for consolidation of services/storage and cost savings, it’s becoming even more vital as a way to provide Business Continuity, High Availability and Disaster Recovery.

For us, virtualization is a given. Our system utilization was low and if there was a peak, it only happened for an hour.

The rest of the time our systems are idle. Our application servers are just not using enough of the physical resources.

— Manager of Portal Operations for a Consumer and Applications Portal Company

The report includes a number of case studies and significant findings, such as:

  • 54% of firms use virtualization to support DR plans
  • 48% use virtualization to support HA strategies
  • 50% use virtualization to support BC implementation

For the typical organization who suffers from excess capacity and the costs associated, virtualization is a must. Along with that move to enterprise level virtualization comes the need for enterprise level business continuity planning.

Since the use of virtualization for BC, HA, and DR purposes is still merging, it is imperative that companies make sure it is implemented with the careful planning and testing of systems. This also will help insure there are no unnecessary redundancies and more efficient process in data recovery management. This latter issue, which is just starting to take hold within the physical world, is certainly going to be the next big issue as more companies use virtualization to support BC, HA, and DR processes.

Recovering data generated from virtualized systems will become a crucial discussion in the coming months.

Register for a free copy of the report here.



Never one to do anything in a small way, CSFB has plans to continue their use of virtualization using rations of up to 15:1.

“With 20,000 servers to manage, financial services powerhouse Credit Suisse had a long list of reasons to consider server virtualization: reducing the number of physical servers to manage, cutting power needs, improving software provisioning time, and deferring expensive datacenter buildouts. But it also needed a clear set of guidelines to determine when to virtualize, plus a clear set of procedures for managing a virtualization initiative.”

More on Credit Suisse’s progress.

SANTA CLARA, Calif. September 12, 2007 Sun Microsystems, Inc. today announced a definitive agreement pursuant to which Sun will acquire the majority of Cluster File Systems, Inc.’s intellectual property and business assets, including the Lustre File System.

Full press release

Sure, there are many ways to explain it.  There are lots of additional technical details to cover, too.  But 30-seconds isn’t very long.  Here’s what I came up with.  What do you think?  The intended audience is someone who has heard of Linux, but is not necessarily technical… maybe even senior IT management?  Leave me some comments and give me your suggestions.

High quality, Enterprise-ready reliability and high availability doesn’t have to cost a fortune… SUSE Linux Enterprise Server from Novell delivers an outstanding value no matter what your workload, and includes features such as high-availability clustering and virtualization so that you can design a business continuity strategy with maximum flexibility and openness.

SUSE Linux Enterprise Server 10 includes the High Availability Storage Infrastructure (HASI) which provides high availability service and application clustering and the supporting components to make it all work. SUSE Linux Enterprise Server 10 also includes Xen virtualization. Similar to VMware, Xen is an open source virtualization technology which allows you to host Linux, Windows, or even NetWare virtual machines. You can even combine the High Availability Storage Infrastructure and Xen technologies together to create a flexible and highly available virtual machine infrastructure allowing you to move avirtual machine from one physical machine to another without impact to the end user – something similar to VMware’s Live Motion.

The best part is that unlike the high cost of proprietary solutions, these enterprise-class solutions leverage open source technologies, plus integration and support from Novell to ensure organizations large and small can afford these business continuity technologies.

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