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.

The Revolution of Our Technology

by Rick Cadruvi, Chief Architect 18. October 2017 12:38

I chose to use the word “Revolution” instead of “Evolution” because, with all due modesty, our patented technology has been more a series of leaps to stay ahead of performance-crushing bottlenecks. After all, our company purpose as stated by our Founder, Craig Jensen, is:

“The purpose of our company is to provide computer technology that enormously increases

the production and income of an area.”

We have always been about improving your production. We know your systems are not about having really cool hardware but rather about maximizing your organization’s production. Our passion has been about eliminating the stops, slows and stalls to your application performance and instead, to jack up that performance and give you headroom for expansion. Now, most of you know us by our reputation for Diskeeper®. What you probably don’t know about us is our leadership in system performance software.

We’ve been at this for 35 years with a laser focus. As an example, for years hard drives were the common storage technology and they were slow and limited in size, so we invented numerous File System Optimization technologies such as Defragmentation, I-FAAST®1 and Directory Consolidation to remove the barriers to getting at data quickly. As drive sizes grew, we added new technologies and jettisoned those that no longer gave bang for the buck. Technologies like InvisiTasking® were invented to help maximize overall system performance, while removing bottlenecks.

As SSDs began to emerge, we worked with several OEMs to take advantage of SSDs to dramatically reduce data access times as well as reducing the time it took to boot systems and resume from hibernate. We created technologies to improve SSD longevity and even worked with manufacturers on hybrid drives, providing hinting information, so their drive performance and endurance would be world class.

As storage arrays were emerging we created technologies to allow them to better utilize storage resources and pre-stage space for future use. We also created technologies targeting performance issues related to file system inefficiencies without negatively affecting storage array technologies like snapshots.

When virtualization was emerging, we could see the coming VM resource contention issues that would materialize. We used that insight to create file system optimization technologies to deal with those issues before anyone coined the phrase “I/O Blender Effect”.

We have been doing caching for a very long time2. We have always targeted removal of the I/Os that get in your applications path to data along with satisfying the data from cache that delivers performance improvements of 50-300% or more. Our goal was not caching your application specific data, but rather to make sure your application could access its data much faster. That’s why our unique caching technology has been used by leading OEMs.

Our RAM-based caching solutions include dynamic memory allocation schemes to use resources that would otherwise be idle to maximize overall system performance. When you need those resources, we give them back. When they are idle, we make use of them without your having to adjust anything for the best achievable performance. “Set It and Forget It®” is our trademark for good reason.

We know that staying ahead of the problems you face now, with a clear understanding of what will limit your production in 3 to 5 years, is the best way we can realize our company purpose and help you maximize your production and thus your profitability. We take seriously having a clear vision of where your problems are now and where they will be in the future. As new hardware and software technologies roll out, we will be there removing the new barriers to your performance then, just as we do now.

1. I-FAAST stands for Intelligent File Access Acceleration Sequencing Technology, a technology designed to take advantage of different performing regions on storage to allow your hottest data to be retrieved in the fastest time.

2. If I can personally brag, I’ve created numerous caching solutions over a period of 40 years.

Recently Discovered SSD Vulnerabilities Could Cripple Global Markets with Data Corruption if Exploited by Attackers

by Brian Morin 15. June 2017 10:38

Recently discovered multi-level cell (MLC) solid-state drive (SSD) vulnerabilities by researchers from Carnegie Mellon University, Seagate, and the Swiss Federal Institute of Technology in Zurich, reveal the first-ever security weakness of its kind against MLC SSDs that store much of the world’s data. Two different types of malicious attacks are reported to corrupt data, leaving much of the world’s data currently exposed while organizations search for answers.

If security experts and data protection experts didn’t have enough to worry about already, the latest discovery from Carnegie Mellon University has set off brand new alarms that could be far more crippling than the recent WannaCry virus or any ransomware attack. In this case, data is not infected or held hostage, but is lost entirely - not even the host SSD hardware can be salvaged after such an attack. This is not simply alarming to organizations that stand the most to lose like financial institutions, but we’re talking about real lives here if patient care is compromised as we saw earlier this month at hospitals across the UK.

In a recently published report by researchers from Carnegie Mellon University, Seagate, and the Swiss Federal Institute of Technology in Zurich, there are two types of malicious attacks that can corrupt data and shorten the lifespan of MLC SSDs – a write attack (“program interference”) and a read attack (“read disturb”). Both attacks inundate the SSD with a large number of operations over a short period of time, which can corrupt data, shorten lifespan, and render an SSD useless to store data in a reliable manner into the future. However, both attacks rely upon native read and write operations from the operating system to the solid-state drive, which is circumvented by Condusiv® I/O reduction software on Windows systems (V-locity®, SSDkeeper®, Diskeeper® 16).

The only reason this story has been covered lightly by the media and not sensationalized across headlines is because no one has died yet or lost a billion dollars. This is a new and very different kind of vulnerability. Protection from this kind of an attack is not something that can be addressed by traditional lines of defense like anti-virus software, firmware upgrades, or OS patches. Since it is cost prohibitive for organizations to “rip-and-replace” multi-cell SSDs with single-cell SSDs, they are forced to rely on data sets that have been “backed-up.” However, what good is restoring data to hardware that can no longer reliably store data?

By acting as the “gatekeeper” between the Windows OS and the underlying SSD device, Condusiv I/O reduction software solutions perform inline optimizations at the OS-level before data is physically written or read from the solid-state drive. As a result, Condusiv’s patented technology is the only known solution that can disrupt “program interference” write operation attacks as well as “read disturb” read operation attacks that would attempt to exploit SSD vulnerabilities and corrupt data. While most known for boosting performance of applications running on Windows systems while extending the longevity of SSDs, Condusiv solutions go a step further as the only line of defense against these malicious attacks.

Condusiv’s patented write optimization engine (IntelliWrite®) mitigates the first vulnerability, “program interference,” by disrupting the write pattern that would otherwise generate errors and corrupt data. IntelliWrite eliminates excessively small writes and subsequent reads by ensuring large, clean contiguous writes from Windows so write operations to solid-state devices are performed in the most efficient manner possible on Windows servers and PCs. An attack could only be successful in the rare instance of limited free space or zero free space on a volume that results in writes occurring natively, circumventing the benefit of IntelliWrite.

Condusiv’s second patented engine (IntelliMemory®) disrupts the second vulnerability, “read disturb,” by establishing a tier-0 caching strategy that leverages idle, available memory to serve hot reads. This renders the “read disturb” attack useless since the storage target for hot reads becomes memory instead of the SSD device. A “read disturb” attack could only be successful in the rare instance that a Windows system is memory constrained and has no idle, available memory to be leveraged for cache.

While organizations use Condusiv software on Windows systems to maintain peak performance and extend the longevity of their SSDs, they can trust Condusiv to protect against malicious attacks that would otherwise corrupt user data and bring great harm to their business and service to customers.

Condusiv Launches SSDkeeper Software that Guarantees “Faster than New” Performance for PCs and Physical Servers and Extends Longevity of SSDs

by Brian Morin 17. January 2017 09:30

The company that sold over 100 Million Diskeeper® licenses for hard disk drive systems, now releases SSDkeeper™ to keep solid-state drive systems running longer while performing “faster than new.”

Every Windows PC or physical server fitted with a solid-state drive (SSD) suffers from very small, fractured writes and reads, which dampen optimal SSD performance and ultimately erodes the longevity of SSDs from write amplification issues. SSDkeeper’s patented software ensures large, clean contiguous writes and reads for more payload with every I/O operation, reduced Program/Erase (P/E) cycles that shorten SSD longevity, and boosts performance even further with its ability to cache hot reads within idle, available DRAM.

Solid-state drives can only handle a number of finite writes before failing. Every write kicks off P/E cycles that shorten SSD lifespan otherwise known as write amplification. By reducing the number of writes required for any given file or workload, SSDkeeper significantly boosts write performance speed while also reducing the number of P/E cycles that would have otherwise been executed. This enables individuals and organizations to reclaim the write speed of their SSD drives while ensuring the longest life possible.

Patented Write Optimization

SSDkeeper’s patented write optimization engine (IntelliWrite®) prevents excessively small, fragmented writes and reads that rob the performance and endurance of SSDs. SSDkeeper ensures large, clean contiguous writes from Windows, so maximum payload is carried with every I/O operation. By eliminating the “death by a thousand cuts” scenario of many, tiny writes and reads that slow system performance, the lifespan of an SSD is also extended due to reduction in write amplification issues that plague all SSD devices.

Patented Read Optimization

SSDkeeper electrifies Windows system performance further with an additional patented feature - dynamic memory caching (IntelliMemory®). By automatically using idle, available DRAM to serve hot reads, data is served from memory which is 12-15X faster than SSD and further reduces wear to the SSD device. The real genius in SSDkeeper’s DRAM caching engine is that nothing has to be allocated for cache. All caching occurs automatically. SSDkeeper dynamically uses only the memory that is available at any given moment and throttles according to the need of the application, so there is never an issue of resource contention or memory starvation. If a system is ever memory constrained at any point, SSDkeeper's caching engine will back off entirely. However, systems with just 4GB of available DRAM commonly serve 50% of read traffic. It doesn't take much available memory to have a big impact on performance.

Enhanced Reporting

If you ever wanted to know how much Windows inefficiencies were robbing system performance, SSDkeeper tracks time saved due to elimination of small, fragmented writes and time saved from every read request that is served from DRAM instead of being served from the underlying SSD. Users can leverage SSDkeeper’s built-in dashboard to see what percentage of all write requests are reduced by sequentializing otherwise small, fractured writes and what percentage of all read requests are cached from idle, available DRAM.

SSDkeeper is a lightweight file system driver that runs invisibly in the background with near-zero intrusion on system resources. All optimizations occur automatically in real-time.

While SSDkeeper provides the same core patented functionality and features as the latest Diskeeper® 16 for hard disk drives (minus defragmentation functions for hard disk drives only), the benefit to a solid-state drive is different than to a hard disk drive. Hard disk drives do not suffer from write amplification that reduces longevity. By eliminating excessively small writes, IntelliWrite goes beyond improved write performance but extends endurance as well.

Available in Professional and Server Editions

>SSDkeeper Professional for Windows PCs with SSD drives greatly enhances the performance of corporate laptops and desktops.

>SSDkeeper Server speeds physical server system performance of the most I/O intensive applications such as MS-SQL Server by 2X to 10X depending on the amount of idle, unused memory.  

>Options include Diskeeper Administrator management console to automate network deployment and management across hundreds or thousands of PCs or servers.  

>A free 30-day software trial download is available at http://www.condusiv.com/evaluation-software/

>Now available for purchase on our online store:  http://www.condusiv.com/purchase/SSDKeeper/

 

How Can I/O Reduction Software Guarantee to Solve the Toughest Performance Problems?

by Brian Morin 14. January 2017 01:00

The #1 request I’ve been getting from customers is a white board video that succinctly explains the two silent killers of VM performance and how our I/O reduction guarantees to solve performance problems, so applications run perfectly on every Windows server.

Expensive backend storage upgrades should ONLY take place when needing more capacity – not more performance. Anytime I tell someone our I/O reduction software guarantees to solve their toughest performance problems…the very first response is invariably the same…HOW? Not only have I answered this question hundreds of times, our own customers find themselves answering this question repeatedly to other team members or new hires.

To make this easier, I’ve answered it all here in this 10-min White Board Video ->, or you can continue reading.

 Most of us have been upgrading hardware to get more performance ever since we can remember. It’s become so engrained, it’s often times the ONLY approach we think of when needing a performance upgrade.

For many organizations, they don’t necessarily need a performance boost on EVERY application, but they need it on one or two I/O intensive applications. To throw a new all-flash array or new hybrid array at a performance problem ends up being the most expensive and disruptive way to solve a performance problem when all you have to do is the same thing thousands of our customers have done: simply try our I/O reduction software on any Windows server and watch the application run at least 50% faster and in many cases 2X-10X faster.

Most IT professionals are unaware of the fact that as great as virtualization has been for server efficiency, the one downside is how it adds complexity to the data path. On top of that, Windows doesn’t play well in a virtual environment (or any environment where it is abstracted from the physical layer). This means I/O characteristics that are a lot smaller, more fractured and more random than they need to be – the perfect trifecta for bad storage performance.

This “death by a thousand cuts” scenario means systems are processing workloads about 50% slower than they should. Condusiv’s I/O reduction software solves this problem by displacing many small tiny writes and reads with large, clean contiguous writes and reads. As huge as that patented engine is for our customers, it’s not the only thing we’re doing to make applications run smoothly. Performance is further electrified by establishing a tier-0 caching strategy - automatically using idle, available memory to serve hot reads. This is the same battle-tested technology that has been OEM’d by some of the largest out there – Dell, Lenovo, HP, SanDisk, Western Digital, just to name a few.

Although we might be most known for our first patented engine that solves Windows write inefficiencies to HDDs or SSDs, more and more customers are discovering just how important our patented DRAM caching engine is. If any customer can maintain even just 4GB of available memory to be used for cache, they most often see cache hit rates in the range of 50%. That means serving data out of DRAM, which is 15X faster than SSD and opens up even more precious bandwidth to and from storage for everything else. Other customers who really need to crank up performance are simply provisioning more memory on those systems and seeing >90% cache hit rates.

See all this and more described in the latest Condusiv I/O Reduction White Board video that explains eeevvvveeerything you need to know about the problem, how we solve it, and the typical results that should be expected in the time it takes you to drink a cup of coffee. So go get a cup of coffee, sit back, relax, and see how we can solve your toughest performance problems – guaranteed.

 

Overview of How We Derive Storage I/O Time Saved

by Rick Cadruvi, Chief Architect 11. January 2017 01:00

The latest versions of V-locity® (for virtual servers) and Diskeeper® (for physical servers and PCs) both contain built-in dashboards that show the exact benefit of the product to any one system or group of systems by showing how much and what percentage of read/write traffic is offloaded from storage and how much “I/O Time” that saves.

To understand the computation on “I/O Time Saved,” in its simplest form, the formula is essentially:

       Storage I/O Time Saved = Total I/Os Eliminated * Average I/O Response Time

In essence, if you take Total I/Os Eliminated from the dashboard Benefits screen and multiply it times the average latency from the I/O Performance dashboard screen, you will generally end up in the ballpark of the “I/O Time Saved.”

I/O counts and I/O times are accumulated on a per I/O basis. Every I/O that goes to storage is timed using Windows High Performance Counters for accuracy.  That timing is from when the I/O is sent down the stack until it comes back up. In essence we time I/O response time (IORT) or latency that the application sees, not the storage device.  We also track reads and writes separately as they impact the storage “I/O Time Saved” differently.

The data is accumulated and calculated during periods of time rather than across the entire reporting period. In the long term, that period of time ends up being hourly. Very active I/O periods will have longer IORTs and therefore the amount of I/O storage time saved per I/O eliminated will likely be greater than during relatively light periods. 

If there is a high queue depth, the IORT we time will be larger than the per I/O storage IORT.  We look at the effective IORT the application would see rather than the time the underlying storage takes to process any single I/O.  After all, the user only cares about how long the application took to process an I/O he/she requested, not how long a HDD or SSD took for any single I/O when it got around to processing it.

Let’s talk for a moment about storage “I/O Time Saved” versus clock time because they are not the same and our technologies can, in some cases, save far more storage I/O time than clock time.

If all storage I/O was sequential for the entire instance of the operating system, then the maximum amount of storage “I/O Time Saved” would be the amount of time since installation, and you would expect it to be considerably less as we are unlikely to eliminate ALL I/Os. And you might expect some idle time. Of course, applications do not do pure sequential I/O.  Modern applications are almost always multi-threaded and most computer systems are running multiple applications or instances of them at the same time.  Also, other operations are happening on the system outside of the primary application.  Think of Outlook running in the background while you do some other work on your system. Outlook is constantly receiving updated data.  Windows is also processing lots of I/Os in the background just for it to be able to continue operations.  These I/Os happen in parallel to any I/Os that users may be doing with an application.

In general, there are lots of I/Os that are being processed at the same time.  You would not want to work on a computer system where only a single I/O was being processed at any one point in time as it would be VERY slow.  If the average queue depth would have been 5 without us but 2 with us, that means every time 2 I/Os go through to storage, we would have eliminated 3 I/Os.  The end result would be a storage “I/O Time Saved” of somewhere between 1.5-3x clock time, depending on how the underlying storage processed the I/Os. 

Another factor that contributes to the possibility of storage “I/O Time Saved” exceeding of clock time is the reduction of split I/Os.  Let’s say that without our product all I/Os actually end up being split into 3 I/Os due to Windows writing files in an excessively small, fragmented manner.  After installing our product, by displacing small, tiny writes with large, contiguous writes, each of those I/Os that had to be split into 3 are now being completed as a single I/O.  If that was the normal case, the storage “I/O Time Saved” for each I/O would be roughly 2x the actual storage I/O time due to prevention of fragmentation.

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