Welcome!

Blog Feed Post

Berkeley Researchers Highlight Emergence of In-Memory Processing

Excellent paper released by researchers at University of California, Berkeley . They have analyzed data from Hadoop installation at Facebook (one of the largest as such in the world) looking at various metrics for Hadoop jobs running at Facebook datacenter that has over 3,000 computers dedicated to Hadoop-based processing.

They have come up with very interesting insights. I advise everyone read it firsthand but I will list some of the interesting bits.

Traditional quest for disk locality (a.k.a. affinity between the Hadoop task and the disk that contains the input data for that task) was based on two key assumptions:

  1. Local disk access is significantly faster than network access to remote disk
  2. Hadoop tasks spend significant amount of their processing time in disk IO reading input data

Through careful analysis of Hadoop system at Facebook (as their prime testbed) authors claim that both of these assumptions are rapidly loosing hold:

  1. With new full-bisection topologies in the modern data centers the local disk access is almost identical in performance to a network access even across the racks (with performance difference today between two is less than 10%).
  2. Greater parallelization and data compressions leads to lower disk IO demand on the individual tasks; in fact, Hadoop job at Facebook deal mostly with text-baed data that can be compressed dramatically.

Authors then argue that memory locality (i.e. keeping input data in memory and maintaining affinity between Hadoop task and its in-memory input data) produces much greater performance advantages because:

  • RAM access is up to three orders of magnitude faster than a local disk access
  • Even though memory size is significantly less than disk capacity it is large enough for most cases (see below)

Consider this fact: despite the fact that 75% of all HDFS blocks are accessed only once the 64% of Hadoop jobs at Facebook achieve the full memory locality for all their tasks (!). In case of Hadoop – full locality means that there is no outlier task that will have to access disk and delay the entire job. And this is all achieved utilizing rather primitive LFU caching policy and basic pre-fetching for input data.

With these facts authors conclude that disk locality is no longer worth while to vie for – and in-memory co-location is the way forward for high performance big data processing as it yields far greater returns.

Facebook’s case is a solid proof of this technology, and GridGain’s In-Memory Data Platform is a solid platform for the rest of us.

Read the original blog entry...

More Stories By Thomas Krafft

Over 15 years of experience in marketing and demand creation, with strategies driving over $500 million in revenue for a variety of companies in several high-growth and competitive markets, including consumer software and web services, ecommerce, demand creation through web and search, big data, and now healthcare.

Latest Stories
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and...
SYS-CON Events announced today that Taica will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Taica manufacturers Alpha-GEL brand silicone components and materials, which maintain outstanding performance over a wide temperature range -40C to +200C. For more information, visit http://www.taica.co.jp/english/.
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busine...
The session is centered around the tracing of systems on cloud using technologies like ebpf. The goal is to talk about what this technology is all about and what purpose it serves. In his session at 21st Cloud Expo, Shashank Jain, Development Architect at SAP, will touch upon concepts of observability in the cloud and also some of the challenges we have. Generally most cloud-based monitoring tools capture details at a very granular level. To troubleshoot problems this might not be good enough.
We all know that end users experience the Internet primarily with mobile devices. From an app development perspective, we know that successfully responding to the needs of mobile customers depends on rapid DevOps – failing fast, in short, until the right solution evolves in your customers' relationship to your business. Whether you’re decomposing an SOA monolith, or developing a new application cloud natively, it’s not a question of using microservices – not doing so will be a path to eventual b...
Enterprises have taken advantage of IoT to achieve important revenue and cost advantages. What is less apparent is how incumbent enterprises operating at scale have, following success with IoT, built analytic, operations management and software development capabilities – ranging from autonomous vehicles to manageable robotics installations. They have embraced these capabilities as if they were Silicon Valley startups. As a result, many firms employ new business models that place enormous impor...
SYS-CON Events announced today that SourceForge has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. SourceForge is the largest, most trusted destination for Open Source Software development, collaboration, discovery and download on the web serving over 32 million viewers, 150 million downloads and over 460,000 active development projects each and every month.
The next XaaS is CICDaaS. Why? Because CICD saves developers a huge amount of time. CD is an especially great option for projects that require multiple and frequent contributions to be integrated. But… securing CICD best practices is an emerging, essential, yet little understood practice for DevOps teams and their Cloud Service Providers. The only way to get CICD to work in a highly secure environment takes collaboration, patience and persistence. Building CICD in the cloud requires rigorous ar...
SYS-CON Events announced today that Dasher Technologies will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Dasher Technologies, Inc. ® is a premier IT solution provider that delivers expert technical resources along with trusted account executives to architect and deliver complete IT solutions and services to help our clients execute their goals, plans and objectives. Since 1999, we'v...
As popularity of the smart home is growing and continues to go mainstream, technological factors play a greater role. The IoT protocol houses the interoperability battery consumption, security, and configuration of a smart home device, and it can be difficult for companies to choose the right kind for their product. For both DIY and professionally installed smart homes, developers need to consider each of these elements for their product to be successful in the market and current smart homes.
In the fast-paced advances and popularity in cloud technology, one of the most critical factors revolves around concerns for security of your critical data. How to assure both your company and your customers they can confidently trust and utilize your cloud environment is most often top on the list. There is a method to evaluating and providing security that exceeds conventional modes of protecting data both within the cloud as well externally on mobile and other devices. With the public failure...
Transforming cloud-based data into a reportable format can be a very expensive, time-intensive and complex operation. As a SaaS platform with more than 30 million global users, Cornerstone OnDemand’s challenge was to create a scalable solution that would improve the time it took customers to access their user data. Our Real-Time Data Warehouse (RTDW) process vastly reduced data time-to-availability from 24 hours to just 10 minutes. In his session at 21st Cloud Expo, Mark Goldin, Chief Technolo...
SYS-CON Events announced today that MIRAI Inc. will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MIRAI Inc. are IT consultants from the public sector whose mission is to solve social issues by technology and innovation and to create a meaningful future for people.
Companies are harnessing data in ways we once associated with science fiction. Analysts have access to a plethora of visualization and reporting tools, but considering the vast amount of data businesses collect and limitations of CPUs, end users are forced to design their structures and systems with limitations. Until now. As the cloud toolkit to analyze data has evolved, GPUs have stepped in to massively parallel SQL, visualization and machine learning.
SYS-CON Events announced today that Massive Networks, that helps your business operate seamlessly with fast, reliable, and secure internet and network solutions, has been named "Exhibitor" of SYS-CON's 21st International Cloud Expo ®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. As a premier telecommunications provider, Massive Networks is headquartered out of Louisville, Colorado. With years of experience under their belt, their team of...