|By Sebastian Kruk||
|March 19, 2013 11:00 AM EDT||
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.
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.
WebRTC is bringing significant change to the communications landscape that will bridge the worlds of web and telephony, making the Internet the new standard for communications. Cloud9 took the road less traveled and used WebRTC to create a downloadable enterprise-grade communications platform that is changing the communication dynamic in the financial sector. In his session at @ThingsExpo, Leo Papadopoulos, CTO of Cloud9, discussed the importance of WebRTC and how it enables companies to focus o...
Jan. 18, 2017 06:15 PM EST Reads: 4,177
Big Data engines are powering a lot of service businesses right now. Data is collected from users from wearable technologies, web behaviors, purchase behavior as well as several arbitrary data points we’d never think of. The demand for faster and bigger engines to crunch and serve up the data to services is growing exponentially. You see a LOT of correlation between “Cloud” and “Big Data” but on Big Data and “Hybrid,” where hybrid hosting is the sanest approach to the Big Data Infrastructure pro...
Jan. 18, 2017 05:30 PM EST Reads: 4,857
In his General Session at 16th Cloud Expo, David Shacochis, host of The Hybrid IT Files podcast and Vice President at CenturyLink, investigated three key trends of the “gigabit economy" though the story of a Fortune 500 communications company in transformation. Narrating how multi-modal hybrid IT, service automation, and agile delivery all intersect, he will cover the role of storytelling and empathy in achieving strategic alignment between the enterprise and its information technology.
Jan. 18, 2017 04:45 PM EST Reads: 4,554
Buzzword alert: Microservices and IoT at a DevOps conference? What could possibly go wrong? In this Power Panel at DevOps Summit, moderated by Jason Bloomberg, the leading expert on architecting agility for the enterprise and president of Intellyx, panelists peeled away the buzz and discuss the important architectural principles behind implementing IoT solutions for the enterprise. As remote IoT devices and sensors become increasingly intelligent, they become part of our distributed cloud enviro...
Jan. 18, 2017 04:30 PM EST Reads: 4,741
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place June 6-8, 2017, at the Javits Center in New York City, New York, is co-located with 20th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry p...
Jan. 18, 2017 03:30 PM EST Reads: 3,676
"LinearHub provides smart video conferencing, which is the Roundee service, and we archive all the video conferences and we also provide the transcript," stated Sunghyuk Kim, CEO of LinearHub, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Jan. 18, 2017 02:45 PM EST Reads: 1,587
Things are changing so quickly in IoT that it would take a wizard to predict which ecosystem will gain the most traction. In order for IoT to reach its potential, smart devices must be able to work together. Today, there are a slew of interoperability standards being promoted by big names to make this happen: HomeKit, Brillo and Alljoyn. In his session at @ThingsExpo, Adam Justice, vice president and general manager of Grid Connect, will review what happens when smart devices don’t work togethe...
Jan. 18, 2017 02:00 PM EST Reads: 387
"There's a growing demand from users for things to be faster. When you think about all the transactions or interactions users will have with your product and everything that is between those transactions and interactions - what drives us at Catchpoint Systems is the idea to measure that and to analyze it," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York Ci...
Jan. 18, 2017 01:00 PM EST Reads: 5,598
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal ...
Jan. 18, 2017 01:00 PM EST Reads: 5,098
Discover top technologies and tools all under one roof at April 24–28, 2017, at the Westin San Diego in San Diego, CA. Explore the Mobile Dev + Test and IoT Dev + Test Expo and enjoy all of these unique opportunities: The latest solutions, technologies, and tools in mobile or IoT software development and testing. Meet one-on-one with representatives from some of today's most innovative organizations
Jan. 18, 2017 12:15 PM EST Reads: 1,533
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in Embedded and IoT solutions, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 7-9, 2017, at the Javits Center in New York City, NY. Supermicro (NASDAQ: SMCI), the leading innovator in high-performance, high-efficiency server technology, is a premier provider of advanced server Building Block Solutions® for Data Center, Cloud Computing, Enterprise IT, Hadoop/Big Data, HPC and E...
Jan. 18, 2017 12:00 PM EST Reads: 5,758
SYS-CON Events announced today that Linux Academy, the foremost online Linux and cloud training platform and community, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Linux Academy was founded on the belief that providing high-quality, in-depth training should be available at an affordable price. Industry leaders in quality training, provided services, and student certification passes, its goal is to c...
Jan. 18, 2017 12:00 PM EST Reads: 1,945
20th Cloud Expo, taking place June 6-8, 2017, at the Javits Center in New York City, NY, 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 strategy.
Jan. 18, 2017 12:00 PM EST Reads: 4,228
WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web communications world. The 6th WebRTC Summit continues our tradition of delivering the latest and greatest presentations within the world of WebRTC. Topics include voice calling, video chat, P2P file sharing, and use cases that have already leveraged the power and convenience of WebRTC.
Jan. 18, 2017 10:30 AM EST Reads: 3,106
"Matrix is an ambitious open standard and implementation that's set up to break down the fragmentation problems that exist in IP messaging and VoIP communication," explained John Woolf, Technical Evangelist at Matrix, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Jan. 18, 2017 09:45 AM EST Reads: 11,555
WebRTC sits at the intersection between VoIP and the Web. As such, it poses some interesting challenges for those developing services on top of it, but also for those who need to test and monitor these services. In his session at WebRTC Summit, Tsahi Levent-Levi, co-founder of testRTC, reviewed the various challenges posed by WebRTC when it comes to testing and monitoring and on ways to overcome them.
Jan. 18, 2017 08:15 AM EST Reads: 5,980
"A lot of times people will come to us and have a very diverse set of requirements or very customized need and we'll help them to implement it in a fashion that you can't just buy off of the shelf," explained Nick Rose, CTO of Enzu, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jan. 18, 2017 07:45 AM EST Reads: 4,636
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
Jan. 18, 2017 06:45 AM EST Reads: 2,768
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, introduced the technologies required for implementing these idea...
Jan. 18, 2017 06:30 AM EST Reads: 4,638
Every successful software product evolves from an idea to an enterprise system. Notably, the same way is passed by the product owner's company. In his session at 20th Cloud Expo, Oleg Lola, CEO of MobiDev, will provide a generalized overview of the evolution of a software product, the product owner, the needs that arise at various stages of this process, and the value brought by a software development partner to the product owner as a response to these needs.
Jan. 18, 2017 06:30 AM EST Reads: 1,188