Welcome!

Agile Computing Authors: Corey Roth, Pat Romanski, Elizabeth White, Yeshim Deniz, Liz McMillan

Related Topics: Java IoT, Microservices Expo, Microsoft Cloud, Machine Learning , Agile Computing, @CloudExpo

Java IoT: Article

Let's Not Play Blame Games

Could it be that it is neither the ISP nor the application provider?

When the operations team gets an alert about potential performance problems that users might be experiencing, it is usually either the infrastructure or the actual application that is causing those problems. Things get interesting when neither the ISP nor the application provider is willing to admit fault. Can we tell who is to blame? Could it be that it is neither the ISP nor the application provider?

The IT department of our customer, SerciaFood, a food production company from Sercia (names changed for commercial reasons), received complaints about the performance of one of its applications. The IT department suspected network problems while the local ISP stood firmly behind its infrastructure and blamed the solution provider.

It Is Not Our Infrastructure
The SerciaFood IT team recently tested a new application before rolling it into production. During the tests the team complained about the performance of that application; the most likely cause of the poor performance was attributed to network problems.

SerciaNet, a big name not only in Sercia but also worldwide, was delivering the network infrastructure for SerciaFood. The ISP began to monitor the network with manual traces and other techniques; the company could not, however, provide any strong evidence that it was not their issue.

The pperations team at SerciaFood was appointed to look into the problem using a real user monitoring tool.

Its first observation was that network performance, i.e., the percentage of traffic that did not encounter network-related issues (Server Loss Rate, Client RTT and Errors), was varying between different regions where SerciaFood services were used.

Figure 1 shows a report where both network and application performance metrics for EMEA are good. EMEA is the most active region on the report since it is where the core business operations of SerciaFood are focused. Other distant regions reported performance problems; the second most active "third-party" region reported high Client RTT and Server Loss Rate. Client RTT is the time of the SYN packet (sent by a server) to travel from APM probe to client and back again. Server Loss Rate is the percentage of total packets sent from a server that were lost and needed to be retransmitted.

Figure 1: Overview of KPIs across all monitored regions

How Is the Network Performance in EMEA?
The Operations team decided to first confirm what was indicated in Figure 1: the key business region, EMEA, was not affected by network problems.

Figure 2 shows a report with all areas monitored within the EMEA region. According to this report the performance is consistently good with about 2.5 sec of operation time and no network-related problems (100% network performance) for all areas within EMEA region.

Figure 2: Performance across all areas appears consistent with operation time at around 2.5 sec for all operations. Network Performance is good across all areas.

After a drill-down to one of user sites (Switzerland), the report shows that the operation time is spent almost entirely on the server side and that the network performance is good too (see Figure 3).

Figure 3: Operation time is spent almost entirely on the server. Network performance is good at this location.

Another drill down to the report with transactions executed at that site (see Figure 4) shows that although server time varies between transactions, the network time remains consistently below 400 ms. The differences in server time between transactions are a result of the different computational complexity between these transactions. For example, responding to Query is likely to be more demanding than responding to Get File.

Figure 4: Server time varies across transactions between 0.5-4 sec. network time is consistently below 400ms

The operations team decided to further investigate two transactions: one that should be heavy on network (Get File) and one that might be heavy on the server side (Query). The former was mostly responsible for merely delivering files to the client application while the latter required more computational power of the server to execute the query. The performance of the former is good with an almost even split between server and network time (see Figure 5), which does not indicate any network-related problems. The operation time for the latter is almost exclusively spent on the server, with negligible network impact (see Figure 6).

Figure 5: Performance is good for the Get File transaction, which by its nature would be more impacted by network time

Figure 6: Performance is poor for the Query transaction with time spent almost exclusively on the server

The operations team concluded, based on the analyzed traffic in the EMEA region, that at least in that region the performance was good and that it was not affected by network infrastructure delivered by SerciaNet.

Who Is Really Affected?
The question remained: why were some users reporting performance problems? From the overview report (see Figure 1) the operations team decided to drill down through third party, the region with the lowest network performance and highest server loss rate.

This region reported poor network performance below 50% and a significant contribution of network component in the operation time (see Figure 7).

Figure 7: Network performance is degraded at third-party locations

Figure 8 shows the report with a list of transactions for the affected user site. Although server and network time varies between transactions, the application performance for all transactions is low, down to 0% for Get File and Query transactions.

Figure 8: Server and network time varies between transactions likely due to the nature of the transactions

Further analysis of the Get File operation across different users shows significant contribution of the network time (see Figure 9). The network time for both operations is inconsistent; it took 4x more time to deliver results of the Query operation to the second user than to the first one (see Figure 10). This might indicate that users represented in this report connect to the SerciaFood applications through different ISPs.

Figure 9: Performance is inconsistent for the Get File transaction with network time being the main contributor

Figure 10: Performance is improved for the Query transaction but network time again showing inconsistency

Based on that analysis the operations team could determine that some users did in fact experience performance problems caused by network issues. Further investigation revealed that those users who were experiencing poor performance were not connecting to the SerciaFood application using the SerciaNet infrastructure but were instead working remotely through VPN using various ISPs.

Conclusion
When operating a service accessed by users from various locations it is important to remember that the end user experience may vary, sometimes significantly. In the case of SerciaFood its most active users were coming from the EMEA region that was implemented on the SerciaNet infrastructure. However, the second most active users were connecting to the SerciaFood services via VPN. Since these users relied on the general Internet connection, their experience was affected by poor network quality. Different users were connected from different ISPs; as a result the network performance in the third-party region was inconsistent.

Using Compuware dynaTrace Data Center Real User Monitoring (DCRUM) the operations team was able to show evidence, which SerciaNet could not gather otherwise, that the problems were neither caused by SerciaNet infrastructure nor by the application itself. They were, in fact, only experienced by remote users connecting via VPN, who were negatively impacted by ISPs network performance problems.

More Stories By Sebastian Kruk

Sebastian Kruk is a Technical Product Strategist, Center of Excellence, at Compuware APM Business Unit.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
Amazon started as an online bookseller 20 years ago. Since then, it has evolved into a technology juggernaut that has disrupted multiple markets and industries and touches many aspects of our lives. It is a relentless technology and business model innovator driving disruption throughout numerous ecosystems. Amazon’s AWS revenues alone are approaching $16B a year making it one of the largest IT companies in the world. With dominant offerings in Cloud, IoT, eCommerce, Big Data, AI, Digital Assista...
Organizations planning enterprise data center consolidation and modernization projects are faced with a challenging, costly reality. Requirements to deploy modern, cloud-native applications simultaneously with traditional client/server applications are almost impossible to achieve with hardware-centric enterprise infrastructure. Compute and network infrastructure are fast moving down a software-defined path, but storage has been a laggard. Until now.
Digital Transformation is much more than a buzzword. The radical shift to digital mechanisms for almost every process is evident across all industries and verticals. This is often especially true in financial services, where the legacy environment is many times unable to keep up with the rapidly shifting demands of the consumer. The constant pressure to provide complete, omnichannel delivery of customer-facing solutions to meet both regulatory and customer demands is putting enormous pressure on...
In his general session at 19th Cloud Expo, Manish Dixit, VP of Product and Engineering at Dice, discussed how Dice leverages data insights and tools to help both tech professionals and recruiters better understand how skills relate to each other and which skills are in high demand using interactive visualizations and salary indicator tools to maximize earning potential. Manish Dixit is VP of Product and Engineering at Dice. As the leader of the Product, Engineering and Data Sciences team at D...
DXWorldEXPO LLC announced today that All in Mobile, a mobile app development company from Poland, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. All In Mobile is a mobile app development company from Poland. Since 2014, they maintain passion for developing mobile applications for enterprises and startups worldwide.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
IoT is at the core or many Digital Transformation initiatives with the goal of re-inventing a company's business model. We all agree that collecting relevant IoT data will result in massive amounts of data needing to be stored. However, with the rapid development of IoT devices and ongoing business model transformation, we are not able to predict the volume and growth of IoT data. And with the lack of IoT history, traditional methods of IT and infrastructure planning based on the past do not app...
DXWorldEXPO LLC announced today that the upcoming DXWorldEXPO | CloudEXPO New York event will feature 10 companies from Poland to participate at the "Poland Digital Transformation Pavilion" on November 12-13, 2018.
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
@DevOpsSummit at Cloud Expo, taking place November 12-13 in New York City, NY, is co-located with 22nd international CloudEXPO | first international DXWorldEXPO and will feature technical sessions from a rock star conference faculty and the leading industry players in the world.
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smart...
As data explodes in quantity, importance and from new sources, the need for managing and protecting data residing across physical, virtual, and cloud environments grow with it. Managing data includes protecting it, indexing and classifying it for true, long-term management, compliance and E-Discovery. Commvault can ensure this with a single pane of glass solution – whether in a private cloud, a Service Provider delivered public cloud or a hybrid cloud environment – across the heterogeneous enter...
DXWorldEXPO LLC announced today that ICC-USA, a computer systems integrator and server manufacturing company focused on developing products and product appliances, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. DXWordEXPO New York 2018, colocated with CloudEXPO New York 2018 will be held November 11-13, 2018, in New York City. ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of ...
Michael Maximilien, better known as max or Dr. Max, is a computer scientist with IBM. At IBM Research Triangle Park, he was a principal engineer for the worldwide industry point-of-sale standard: JavaPOS. At IBM Research, some highlights include pioneering research on semantic Web services, mashups, and cloud computing, and platform-as-a-service. He joined the IBM Cloud Labs in 2014 and works closely with Pivotal Inc., to help make the Cloud Found the best PaaS.
Headquartered in Plainsboro, NJ, Synametrics Technologies has provided IT professionals and computer systems developers since 1997. Based on the success of their initial product offerings (WinSQL and DeltaCopy), the company continues to create and hone innovative products that help its customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business or per...
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
In an era of historic innovation fueled by unprecedented access to data and technology, the low cost and risk of entering new markets has leveled the playing field for business. Today, any ambitious innovator can easily introduce a new application or product that can reinvent business models and transform the client experience. In their Day 2 Keynote at 19th Cloud Expo, Mercer Rowe, IBM Vice President of Strategic Alliances, and Raejeanne Skillern, Intel Vice President of Data Center Group and ...
Founded in 2000, Chetu Inc. is a global provider of customized software development solutions and IT staff augmentation services for software technology providers. By providing clients with unparalleled niche technology expertise and industry experience, Chetu has become the premiere long-term, back-end software development partner for start-ups, SMBs, and Fortune 500 companies. Chetu is headquartered in Plantation, Florida, with thirteen offices throughout the U.S. and abroad.
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
From 2013, NTT Communications has been providing cPaaS service, SkyWay. Its customer’s expectations for leveraging WebRTC technology are not only typical real-time communication use cases such as Web conference, remote education, but also IoT use cases such as remote camera monitoring, smart-glass, and robotic. Because of this, NTT Communications has numerous IoT business use-cases that its customers are developing on top of PaaS. WebRTC will lead IoT businesses to be more innovative and address...