Virtualization Technology News and Information
Improve Disk Performance and Reduce Energy Consumption

PerfectDisk 12, the leader in disk defragmentation and optimization software, is the only technology available today that can prevent up to 100% of file fragmentation while minimizing free space fragmentation for increased disk performance and reduced energy consumption.   

PerfectDisk 12, released earlier this month, introduces OptiWrite, a new file system filter that eliminates fragmentation in real-time by ensuring that up to 100% of files are written to the file system in a single continuous stream. OptiWrite detects when Windows is going to fragment files and intelligently redirects I/O so that most fragmentation does not occur. As a result, the need to utilize CPU and Disk I/O resources to defragment files is greatly reduced.

In addition, OptiWrite ensures maximum sequential write performance for storage devices, effectively eliminating slow random write behavior. Because less work is needed to optimize the drive, there is a direct benefit in the form of energy saved in both CPU usage and in the reading and writing to a disk. It saves users both in energy costs and in the time required to optimize the drive.

"PerfectDisk 12 delivers real value with the OptiWrite fragmentation-prevention technology," says Dr. Steven Gurgevich, Clinical Assistant Professor of Medicine, University of Arizona College of Medicine. "I've seen the perfect combination of faster systems yet reduced system resources and costs. And with enhanced support for thin provisioned drives, virtualization performance also benefits significantly."

OptiWrite - Fragmentation Prevention Done Intelligently

If you simply prevent file fragmentation at the expense of creating free space fragmentation, a volume will:

  • inevitably be forced to fragment files regardless of any prevention method
  • sacrifice fast sequential reads for slow random reads
  • require that additional system resources and energy costs be spent to fully restore performance.

In order to attain the best performance and energy savings, the fragmentation prevention solution must factor in the placement of data and avoid excessive free space fragmentation.

Any form of fragmentation prevention that creates excessive amounts of free space fragmentation negatively affects thin provisioned systems that use high water marking. This is because such solutions artificially push files down the volume to higher LCN ranges by creating large free space gaps between files. The use of such a solution will promote the rapid provisioning of a thin provisioned volume and should be avoided.

OptiWrite performs above and beyond its competition because it was designed to prevent file fragmentation in a way that does not negatively impact the performance of subsequent reads. For a detailed explanation and testing results, see the new white paper Real-time Fragmentation Prevention with OptiWrite.

Not all data, hardware and workloads are created equal. OptiWrite is designed with these considerations in mind and provides sufficient flexibility and customization to meet the task at hand.

Published Wednesday, June 22, 2011 5:31 AM by David Marshall
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