|By Peter Velikin||
|May 2, 2012 07:00 AM EDT||
Dr Dog Says “You Need More RAM In Your Cache Diet”
Well, I am not really a doctor, but I play one on TV. You may remember (if you are old enough) that line from the 1986 Vicks-44 TV commercial. Anyway, while I may not be a real doctor, I can certainly tell you about why you need more RAM in you cache diet.
“I Think My Cache Diet Is Great”
If you were happily running your IT system but needed some additional performance, chances are you turned to some kind of SSD caching solution to improve performance at a lower cost point than adding more servers or storage. You went on what I am calling a “cache diet” (no, not the “crash diet” you went on last year to lose a few lbs). You may think your cache diet is great. “Dog, we got some performance improvement and the applications guys are not bothering me anymore, at least for now.” And it is true, you did see some performance improvement when you went to an SSD caching solution….but now, things are starting to slow down again and the applications guys are making noise again. You are experiencing IO bottlenecks and higher latency times for data access or you just never really got all the improvements you expected. “So what do I do now, Dr. Dog?” Well, the problem is the SSD cache solution you implemented does not have any RAM in it and the solution from the good doctor is “you need more RAM in your cache diet.”
We Call It “Hybrid Caching”
SSD caching is a combination of an SSD device and SSD caching software. It is being sold by many vendors and comes in many flavors. It can be installed in many different locations in the computer system storage architecture. This was discussed in a recently posted blog where the pros/cons of each location were discussed. What was not talked about in that blog, however, was what types of caching algorithms actually used RAM as part of their solution. At Velobit, we use a combination of SSD and RAM to implement our SSD caching software; a solution we refer to as “hybrid caching.”
“So What Does More RAM In My Cache Diet Actually Do?”
“Doctor” Dog shall explain: Using RAM with SSD cache hardware makes the life of the SSD better. Even a small amount of RAM is effective in reducing IO loads on the SSD. Obviously, if RAM is used for cache, a RAM cache hit is going to respond faster than any SSD and frees the SSD to perform other essential tasks such as garbage collection and complete pending writes. SSDs perform poorly with mixed read/write IOs. A RAM cache helps limit mixed writes/reads, improving SSD performance and overall cache performance.
Velobit HyperCache SSD caching software uses RAM efficiently so even a small amount of RAM allocated to caching can impact performance. Velobit uses compression algorithms based on content locality caching to reduce the amount of physical data stored in RAM. The impact of this is to effectively increase the virtual cache size without dedicating excessive RAM resources to cache. And, while some file system caching software can use RAM to improve performance, those techniques do not use data compression to maximize the performance of the allocated RAM.
Finally, using RAM in the caching algorithm allows the Velobit SSD caching software to do selective SSD writes – it does not write data to the SSD unless the data needs to go there. Sequential data is written directly to HDD, completely bypassing the SSD.
“I Feel Better Already”
So, if your SSD caching system seems a little, shall we say, constipated, you can probably fix that by adding a little RAM to your SSD cache diet.
“All our customers are looking at the cloud ecosystem as an important part of their overall product strategy. Some see it evolve as a multi-cloud / hybrid cloud strategy, while others are embracing all forms of cloud offerings like PaaS, IaaS and SaaS in their solutions,” noted Suhas Joshi, Vice President – Technology, at Harbinger Group, in this exclusive Q&A with Cloud Expo Conference Chair Roger Strukhoff.
Oct. 4, 2015 12:45 PM EDT Reads: 279
SYS-CON Events announced today that JFrog, maker of Artifactory, the popular Binary Repository Manager, will exhibit at SYS-CON's @DevOpsSummit Silicon Valley, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Based in California, Israel and France, founded by longtime field-experts, JFrog, creator of Artifactory and Bintray, has provided the market with the first Binary Repository solution and a software distribution social platform.
Oct. 4, 2015 12:30 PM EDT Reads: 425
SYS-CON Events announced today that Agema Systems will exhibit at the 17th International Cloud Expo®, which will take place on November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Agema Systems is the leading provider of critical white-box rack solutions to data centers through the major integrators and value added distribution channels.
Oct. 4, 2015 12:30 PM EDT Reads: 608
Clearly the way forward is to move to cloud be it bare metal, VMs or containers. One aspect of the current public clouds that is slowing this cloud migration is cloud lock-in. Every cloud vendor is trying to make it very difficult to move out once a customer has chosen their cloud. In his session at 17th Cloud Expo, Naveen Nimmu, CEO of Clouber, Inc., will advocate that making the inter-cloud migration as simple as changing airlines would help the entire industry to quickly adopt the cloud wit...
Oct. 4, 2015 12:30 PM EDT Reads: 367
Learn how Backup as a Service can help your customer base protect their data. In his session at 17th Cloud Expo, Stefaan Vervaet, Director of Strategic Alliances at HGST, will discuss the challenges of data protection in an era of exploding storage requirements, show you the benefits of a backup service for your cloud customers, and explain how the HGST Active Archive and CommVault are already enabling this service today with customer examples.
Oct. 4, 2015 12:30 PM EDT Reads: 640
SYS-CON Events announced today that Interface Masters Technologies, provider of leading network visibility and monitoring solutions, will exhibit at the 17th International CloudExpo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Interface Masters Technologies is a leading provider of high speed networking solutions focused on Gigabit, 10 Gigabit, 40 Gigabit and 100 Gigabit Ethernet network access and connectivity products. For over 20 ye...
Oct. 4, 2015 12:30 PM EDT Reads: 618
Docker is hot. However, as Docker container use spreads into more mature production pipelines, there can be issues about control of Docker images to ensure they are production-ready. Is a promotion-based model appropriate to control and track the flow of Docker images from development to production? In his session at DevOps Summit, Fred Simon, Co-founder and Chief Architect of JFrog, will demonstrate how to implement a promotion model for Docker images using a binary repository, and then show h...
Oct. 4, 2015 12:30 PM EDT Reads: 644
Secure Cloud through Automated Compliance | @CloudExpo @CloudRaxak #Cloud #BigData #DevOps #Microservices
Cloud computing delivers on-demand resources that provide businesses with flexibility and cost-savings. The challenge in moving workloads to the cloud has been the cost and complexity of ensuring the initial and ongoing security and regulatory (PCI, HIPAA, FFIEC) compliance across private and public clouds. Manual security compliance is slow, prone to human error, and represents over 50% of the cost of managing cloud applications. Determining how to automate cloud security compliance is critical...
Oct. 4, 2015 12:15 PM EDT Reads: 178
Learn how IoT, cloud, social networks and last but not least, humans, can be integrated into a seamless integration of cooperative organisms both cybernetic and biological. This has been enabled by recent advances in IoT device capabilities, messaging frameworks, presence and collaboration services, where devices can share information and make independent and human assisted decisions based upon social status from other entities. In his session at @ThingsExpo, Michael Heydt, founder of Seamless...
Oct. 4, 2015 12:00 PM EDT Reads: 599
SYS-CON Events announced today that VividCortex, the monitoring solution for the modern data system, will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. The database is the heart of most applications, but it’s also the part that’s hardest to scale, monitor, and optimize even as it’s growing 50% year over year. VividCortex is the first unified suite of database monitoring tools specifically desi...
Oct. 4, 2015 12:00 PM EDT Reads: 326
Culture is the most important ingredient of DevOps. The challenge for most organizations is defining and communicating a vision of beneficial DevOps culture for their organizations, and then facilitating the changes needed to achieve that. Often this comes down to an ability to provide true leadership. As a CIO, are your direct reports IT managers or are they IT leaders? The hard truth is that many IT managers have risen through the ranks based on their technical skills, not their leadership ab...
Oct. 4, 2015 12:00 PM EDT Reads: 815
Interested in leveraging automation technologies and a cloud architecture to make developers more productive? Learn how PaaS can benefit your organization to help you streamline your application development, allow you to use existing infrastructure and improve operational efficiencies. Begin charting your path to PaaS with OpenShift Enterprise.
Oct. 4, 2015 12:00 PM EDT Reads: 302
SYS-CON Events announced today that Harbinger Systems will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Harbinger Systems is a global company providing software technology services. Since 1990, Harbinger has developed a strong customer base worldwide. Its customers include software product companies ranging from hi-tech start-ups in Silicon Valley to leading product companies in the US a...
Oct. 4, 2015 12:00 PM EDT Reads: 709
SYS-CON Events announced today that Machkey International Company will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Machkey provides advanced connectivity solutions for just about everyone. Businesses or individuals, Machkey is dedicated to provide high-quality and cost-effective products to meet all your needs.
Oct. 4, 2015 11:45 AM EDT Reads: 244
Apps and devices shouldn't stop working when there's limited or no network connectivity. Learn how to bring data stored in a cloud database to the edge of the network (and back again) whenever an Internet connection is available. In his session at 17th Cloud Expo, Bradley Holt, Developer Advocate at IBM Cloud Data Services, will demonstrate techniques for replicating cloud databases with devices in order to build offline-first mobile or Internet of Things (IoT) apps that can provide a better, ...
Oct. 4, 2015 11:00 AM EDT Reads: 340
As more and more data is generated from a variety of connected devices, the need to get insights from this data and predict future behavior and trends is increasingly essential for businesses. Real-time stream processing is needed in a variety of different industries such as Manufacturing, Oil and Gas, Automobile, Finance, Online Retail, Smart Grids, and Healthcare. Azure Stream Analytics is a fully managed distributed stream computation service that provides low latency, scalable processing of ...
Oct. 4, 2015 11:00 AM EDT Reads: 704
You have your devices and your data, but what about the rest of your Internet of Things story? Two popular classes of technologies that nicely handle the Big Data analytics for Internet of Things are Apache Hadoop and NoSQL. Hadoop is designed for parallelizing analytical work across many servers and is ideal for the massive data volumes you create with IoT devices. NoSQL databases such as Apache HBase are ideal for storing and retrieving IoT data as “time series data.”
Oct. 4, 2015 10:45 AM EDT Reads: 349
SYS-CON Events announced today that Alert Logic, the leading provider of Security-as-a-Service solutions for the cloud, has been named “Bronze Sponsor” of SYS-CON's 17th International Cloud Expo® and DevOps Summit 2015 Silicon Valley, which will take place November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Alert Logic provides Security-as-a-Service for on-premises, cloud, and hybrid IT infrastructures, delivering deep security insight and continuous protection for cust...
Oct. 4, 2015 10:15 AM EDT Reads: 2,342
Cloud Foundry open Platform as a Service makes it easy to operate, scale and deploy application for your dedicated cloud environments. It enables developers and operators to be significantly more agile, writing great applications and deliver them in days instead of months. Cloud Foundry takes care of all the infrastructure and network plumbing that you need to build, run and operate your applications and can do this while patching and updating systems and services without any downtime.
Oct. 4, 2015 10:00 AM EDT Reads: 4,399
Redis is not only the fastest database, but it has become the most popular among the new wave of applications running in containers. Redis speeds up just about every data interaction between your users or operational systems. In his session at 17th Cloud Expo, Dave Nielsen, Developer Relations at Redis Labs, will share the functions and data structures used to solve everyday use cases that are driving Redis' popularity
Oct. 4, 2015 10:00 AM EDT Reads: 261