Condusiv Technologies Blog

Condusiv Technologies Blog

Blogging @Condusiv

The Condusiv blog shares insight into the issues surrounding system and application performance—and how I/O optimization software is breaking new ground in solving those issues.

Apples to Apples

by Michael 23. March 2006 20:55
Following up on Paul's recent posting on free space consolidation, I felt the following blog has some relevance. Please note that Paul's post has received quite a bit of feedback and I will respond to that in the next few days, time permitting, because it is a very involved subject. Just over three years ago Gartner, a leading IT Analyst group published a report on defragmentation, and specifically the impact of defragmentation methodologies on free space fragmentation. Gartner enjoys a well-earned reputation for quality and accuracy of its reports, and this typically is the case. However, they do on rare occasion make mistakes. I will play devil's advocate and argue a particular little misstep in this report. Keep in mind that the information about the built-in defragmenter is correct; however, the broader conclusion derived from data applies flawed logic.

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Microsoft and Diskeeper Agree on Free Space Defrag

by Helpdesk 17. March 2006 16:47
There has been some confusion in the past regarding free space defragmentation. Some people in the industry believed that after a defragmentation job free space should be consolidated into one pool. Here at Diskeeper Corporation we have long since maintained that this doesn't make sense (see our whitepaper on this very subject). Moving free space into one consolidated pool is a temporary condition that wastes resources and serves no purpose. Instead free space should be grouped in a few contiguous pools. I was happy to see Microsoft has recently validated our longstanding position. Checkout the section on free space fragmentation in the new Microsoft TechNet article, Maintaining Windows 2000 Peak Performance through Defragmentation: "Free Space Fragmentation A partially full disk contains unused space, known as free space. Ideally, this space would be available in a few contiguous portions of the disk." -Microsoft TechNet -Paul

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New Microsoft Defragmentation Recommendations

by Michael 15. March 2006 18:10
A new Microsoft TechNet article, Maintaining Windows 2000 Peak Performance through Defragmentation, was recently published. The article provides a very good overview on disk fragmentation. From 2005 to 2006 Microsoft has improved dramatically in their defrag schedule recommendations, switching from the outdated monthly rule of thumb to recommending a weekly schedule. While Microsoft's recent schedule recommendation is a big improvement, it doesn't go far enough. In this article Microsoft makes the observation that, "normal, day-to-day use of your computer will cause fragmentation". Even a desktop in a client-server environment (where the data resides on a file server) can see 1,000+ fragments build up on its local disk drive in a single day. Worse yet these fragmented files are probably among a small set of files you use the most. A daily schedule is really the way to go. A daily defrag schedule keeps your defragmentation jobs short and handles fragmentation as it occurs, ensuring no losses in performance.

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Defrag your virtual servers daily!

by Helpdesk 3. March 2006 19:04
Several months ago I blogged on the importance of defragmenting virtual servers. I was very pleased to see a recent article in Redmond Magazine discussing VMware, storage virtualization and defragmentation. The following is a choice quote from the article:
"Defragment the host's disks as often as possible. Members of the VMware community recommend doing so on a daily basis. With VMware's disk files often consuming gigabytes of space for a single file, even a little fragmentation can significantly impact performance."
More and more people are recognizing the need for daily defragmentation in today's storage environment. A daily schedule keeps defrag jobs short and handles fragmentation as it occurs. Have you defragged today? -Paul

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Diskeeper and Vista - February 9, 2006

by Michael 9. February 2006 19:09

Product News: We are a few short business days away from offering a free public beta of Diskeeper 10 for Windows Vista (build 5270). Keep your eyes on our official PR announcements for more information.

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