SOURCE: Diskeeper Corporation

October 01, 2009 14:02 ET

Fully Automatic Defrag: Cures Basic Performance Barrier in SAN Technology

BURBANK, CA--(Marketwire - October 1, 2009) - If there's one important element that makes a business run -- aside from money -- it would be data. In the old days, data was stored in filing cabinets, and file clerks would run files back and forth between users of the data and their storage location. Later, into the computer age, data was stored electronically on hard drives, and saved there and retrieved by users.

Since data is so vital to a company, its protection became paramount. Backup technologies quickly evolved to ensure that disk corruption or crashes would not mean permanent data loss; these continue to evolve. Since access to backups could be slow and cumbersome -- and usually that data was needed yesterday -- redundant technologies such as RAID were evolved so that fast access could still be obtained in the event of a failure.

Another major advance was soon seen to be needed, as access to data storage was competing for server time and network bandwidth with all the other traffic of the enterprise -- and thus evolved Storage Area Networks (SANs). SAN was seen as a brilliant way to move much of this traffic off of servers. Because stored data does not reside directly on any of those servers, server power is now used strictly for business applications and network capacity is freed up for other purposes.

As advanced as it is, SAN technology still suffers from a very basic performance barrier: file fragmentation. In fact, because there are additional steps to accessing files from -- and saving files to -- a SAN, fragmentation can even have more of an impact with SAN than with a local or server drive. A SAN is "seen" by the file system as a local drive; a file request must go through the extra step of being passed to the logical drive and then again to the physical drive where the data is actually located. Retrieval must go through the same steps in reverse. When a file is fragmented, many extra I/Os must be accomplished to account for the fragments.

The only way to fully utilize the full benefit of a SAN is with the completely automatic defrag provided by Diskeeper® defragmentation software.

"Diskeeper is definitely a vital tool that increases and improves performance, especially in database environments. We utilize Diskeeper on all of our servers. It works well, does the job and we are pleased with the results. I'm no longer worried about file fragmentation and I know that my servers operate at peak performance," said Nasim Mansurov, Vice President of Information Technology at Stonebridge Companies. "We use EMC Clarion SAN and Diskeeper defragments 200 GB of data from the SAN very efficiently, without impacting the server performance."

Utilizing otherwise-idle resources, Diskeeper Corporation's proprietary InvisiTasking® technology allows defrag to occur whenever and wherever possible so that performance is constantly maintained, and there is never a negative performance impact from defrag. Scheduling is never required.

Data is fundamental to the operation of an enterprise. Make sure that SAN-stored data is always accessible, at the fastest transfer rates possible.

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