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.

How to donate your old PCs to a great cause... more info to come.

by Colleen Toumayan 23. February 2011 11:39

Diskeeper Corporation Supports Outlook Foundation Programs that Provide Computers to Students in Need and Military Personnel Being Deployed 

Diskeeper Corporate Office Is One of the Sites Where Computers Will Be Distributed 

BURBANK, Calif. and LAS VEGAS, Feb. 22, 2011Diskeeper Corporation announces its active participation in the Outlook Foundation’s programs to repurpose computers and give them to children in need, as well as to military personnel being deployed and their families. The Diskeeper Corporation corporate office is one of the sites where computers will be distributed to recipients. 

“We are very pleased to make this commitment to such a worthy cause,” said Colleen Toumayan, PR and Media Relations Executive for Diskeeper. “John Iasiuolo, president of the foundation, is also host of the Computer Outlook Radio Talk Show, for which we’ve been a corporate sponsor for the past eight years. Our participation in the Outlook Foundation is an extension of the trust and respect we have for John, and is one way we can show our support for his efforts to help others.” 

The student and military recipients of the Outlook Foundation computers being presented at Diskeeper Corporation will be announced soon.  For more information on Diskeeper Corporation visit their website at www.diskeeper.com . 

“The Outlook Foundation, which is based in Las Vegas, supports students and military personnel across the country, and I am very grateful to Diskeeper for stepping up as the first corporation to play an active role in our programs,” Iasiuolo said. “Technology is so critical to children’s education, because a computer gives them access to a world of information and opportunity that can change their lives. And for military personnel being deployed, computers keep the family in touch, even though they may be a world apart.”

There will also be computers given to student and military recipients in Las Vegas on March 2, 2011 at New Horizons Computer Learning Center of Las Vegas. 

About Diskeeper Corporation

Innovators in Performance and Reliability Technologies®: CIOs, IT Managers and System Administrators of Global Fortune 1000 and Forbes 500 enterprises rely on Diskeeper® performance software to provide unparalleled performance and reliability to their business laptops, desktops and servers. Diskeeper® 2010 includes the breakthrough IntelliWrite™ fragmentation prevention technology. V-locity 2.0 virtual platform disk optimizer for VMware and Hyper –V eliminates the barriers to full virtual efficiency and maximum I/O performance on virtual servers. Diskeeper Corporation further provides real-time data protection and real-time data recovery with Undelete® data recovery software (www.undelete.com). InvisiTasking® technology enables any process to run completely invisibly in the background, fully tapping the power of otherwise unused idle resources (www.invisitasking.com).  

About Outlook Foundation

The Outlook Foundation has submitted for its 501(C)(3) status as a non-profit organization created to refurbish and repurpose computers; providing them to children whose economic background prevents them from having the equal educational opportunities, as well as U.S. service personnel and their stateside families in an effort to help maintain communication during deployments. For more information, please visit www.outlookfoundation.org or call 888-782-3610.

Tags:

corporate giving

IBM's Watson would get this one right too...

by Michael 18. February 2011 07:54

On April 10, 2002, Diskeeper enjoyed 15 seconds of TV game-show fame on the TV show Jeopardy with the answer: "Diskeeper is software to do this, reorganize your computer’s files."  The contestant won $2,000 by correctly providing the question, "What is defragment?"

 

Tags:

Defrag | Diskeeper | Diskeeper TV

All Around the World (part deux)

by Colleen Toumayan 18. February 2011 07:07

 

“I am the person who proposed Diskeeper a few years ago in our company because we had some people who were complaining about slow machines. Most of the times the problem was related to the hard disks that were non-stop reading/writing. I tried a few times the internal defragmenter; it helped in reducing the slowness of the machine but it was always for a short time. So I looked for a better product and found Diskeeper.  

I made contact with Diskeeper UK and we had the pleasure to deal with an employee who arranged for an evaluation version of Diskeeper and Diskeeper Administrator to test in our company. 

We have a high number of computers, 16000, which are now running smoothly. The IntelliWrite does a good job preventing fragmentation. The number of calls for slow machines have dropped but we never had real measurements about the performance of Diskeeper. I am very curious about Diskeeper 2011 and what it can bring more so than this version. Diskeeper works and it is a good product. The price is also very good." 

Marc Vanderhaegen, SNCB (Société nationale des Chemins de fer belges)

Desktop Management

Brussels, Belgium

Tags:

IntelliWrite | Success Stories

Helping Customers All Across the Globe

by Colleen Toumayan 17. February 2011 08:54

“The initial feedback we're getting from our end users is that the performance improved after we implemented Diskeeper. End users had been suffering from slow access to the databases and the huge systems images. This is much better lately due to using the Diskeeper EnterpriseServer. Our main goal for using the Diskeeper has been achieved and people are feeling the difference."

“We are mainly a Health Sector solutions provider for the whole Middle East and soon North Africa, for variety vendors with high focus on Philips solutions. We are vendor free when it comes to IT products, so we use different brands like IBM, HP with Microsoft platforms only, and on top of all that the medical and health solutions like Cardiac Pictures and Archiving solutions, CPACK, and patients monitoring.

 

 

“Please feel free posting my comments. This is the least thing we can afford in paying back your reputable company for availing this fine product.” 

Ayman A. Nimer

Technology Services Segment Manager

Al Faisaliah Medical Systems

Tags:

Defrag | Success Stories

Do you need to defragment a Mac?

by Michael 2. February 2011 05:54

The purpose of this blog post is to provide some data about fragmentation on the Mac, that I've not seen researched/published elsewhere.

Mac OSX has a defragmenter in the file system itself. Given Mac is open-source, we looked at the code.

During a file open the files get defragmented if the following conditions are met:

1. The file is less than 20MB in size

2. There are more than 7 fragments

3. System has been up for more than 3 minutes

4. A regular file

5. File system is journaled

6. And the file system is not read-only.

So what's Apple's take on the subject? An Apple technical article states this:

Do I need to optimize?

You probably won't need to optimize at all if you use Mac OS X. Here's why:

  • Hard disk capacity is generally much greater now than a few years ago. With more free space available, the file system doesn't need to fill up every "nook and cranny." Mac OS Extended formatting (HFS Plus) avoids reusing space from deleted files as much as possible, to avoid prematurely filling small areas of recently-freed space.
  • Mac OS X 10.2 and later includes delayed allocation for Mac OS X Extended-formatted volumes. This allows a number of small allocations to be combined into a single large allocation in one area of the disk.
  • Fragmentation was often caused by continually appending data to existing files, especially with resource forks. With faster hard drives and better caching, as well as the new application packaging format, many applications simply rewrite the entire file each time. Mac OS X 10.3 Panther can also automatically defragment such slow-growing files. This process is sometimes known as "Hot-File-Adaptive-Clustering."
  • Aggressive read-ahead and write-behind caching means that minor fragmentation has less effect on perceived system performance.

For these reasons, there is little benefit to defragmenting.

Note: Mac OS X systems use hundreds of thousands of small files, many of which are rarely accessed. Optimizing them can be a major effort for very little practical gain. There is also a chance that one of the files placed in the "hot band" for rapid reads during system startup might be moved during defragmentation, which would decrease performance.

If your disks are almost full, and you often modify or create large files (such as editing video, but see the Tip below if you use iMovie and Mac OS X 10.3), there's a chance the disks could be fragmented. In this case, you might benefit from defragmentation, which can be performed with some third-party disk utilities. 
 

Here is my take on that information:

While I have no problem with the lead-in which states probably, the reasons are theoretical. Expressing theory and then an opinion on that theory is fine, so long as you properly indicate it is an opinion. The problem I do have with this is the last sentence before the notation, "For these reasons, there is little benefit to defragmenting.", or more clearly; passing off theory as fact.

Theory, and therefore "reasons" need to be substantiated by actual scientific processes that apply the theory and then either validate or invalidate it. Common examples we hear of theory-as-fact are statements like "SSDs don't have moving parts and don't need to be defragmented". Given our primary business is large enterprise corporations, we hear a lot of theory about the need (or lack thereof) of defragmenting complex and expensive storage systems. In all those cases, testing proves fragmentation (files, free space or both) slows computers down. The reasons sound logical, which dupes readers/listeners into believing the statements are true.

On that note, while the first three are logical, the last "reason" is most likely wrong. Block-based read-ahead caching is predicated on files being sequentially located/interleaved on the same disk "tracks". File-based read-ahead would still have to issue additional I/Os due to fragmentation. Fragmentation of data essentially breaks read-ahead efforts. Could the Mac be predicting file access and pre-loading files into memory well in advance of use, sure. If that's the case I could agree with the last point (i.e. "perceived system performance), but I find this unlikely (anyone reading this is welcome to comment).

They do also qualify the reason by stating "minor fragmentation", to which I would add that that minor fragmentation on Windows may not have "perceived" impact either.

I do agree with the final statement that states "you might benefit from defragmentation" when using large files, although I think might is too indecisive.

Where my opinion comes from:

A few years ago (spring/summer of 2009) we did a research project to understand how much fragmentation existed on Apple Macs. We wrote and sent out a fragmentation/performance analysis tool to select customers who also had Macs at their homes/businesses. We collected data from 198 volumes on 82 Macs (OSX 10.4.x & 10.5.x). 30 of those systems were in use between 1 – 2 years. 

                               

While system specifics are confidential (testers provided us the data under non-disclosure agreements) we found that free space fragmentation was particularly bad in many cases (worse than Windows). We also found an average of a little over 26,000 fragments per Mac, with an average expected performance gain from defrag of about 8%.Our research also found that the more severe cases of fragmentation, where we saw 70k/100k+ fragments, were low on available free space (substantiating that last paragraph in the Apple tech article).

This article also provide some fragmentation studies as well as performance tests. Their data also validates Apple's last paragraph and makes the "might benefit" statement a bit understated.

Your Mileage May Vary (YMMV): 

So, in summary I would recommend defragmenting your Mac. As with Windows, the benefit from defragmenting is proportionate to the amount of fragmentation. Defrag will help. The question is "does defrag help enough to spend the time and money?". The good thing is most Mac defragmenters, just like Diskeeper for Windows, have free demo versions you can trial to see if its worth spending money.

 

Here are some options: 

+ iDefrag (used by a former Diskeeper Corp employee who did graphic design on a Mac)

+ Drive Genius suite (a company we have spoken with in the past)

+ Stellar Drive Defrag (relatively new)

Perhaps this article begs the question/rumor "will there be a Diskeeper for Mac?", to which I would answer "unlikely, but not impossible". The reason is that we already have a very full development schedule with opportunities in other areas that we plan to pursue.

We are keeping an "i" on it though ;-).

Month List

Calendar

<<  May 2017  >>
MoTuWeThFrSaSu
24252627282930
1234567
891011121314
15161718192021
22232425262728
2930311234

View posts in large calendar