Welcome!

Industrial IoT Authors: Elizabeth White, Yeshim Deniz, William Schmarzo, Stackify Blog, SmartBear Blog

Related Topics: @CloudExpo, Industrial IoT, Microservices Expo, Agile Computing, Cloud Security

@CloudExpo: Blog Post

Amazon Outage

Alerting to catch infrastructure problems

You don’t have to be a pre-cog to find and deal with infrastructure and application problems; you just need good monitoring.  We had quite a day Monday during the EC2 EBS availability incident.  Thanks to some early alerts - which started coming in about 2.5 hours before AWS started reporting problems - our ops team was able to intervene and make sure that our customers’ data was safe and sound. I’ll start with screenshots of what we saw and experienced, then get into what metrics to watch and alert on in your environment, as well as how to do so in TraceView.

10:30 AM EST: Increased disk latency, data pipeline backup
Around 10 am, we started to notice that writes weren’t moving through our pipeline as smoothly as before.  Sure enough, pretty soon we started seeing alerts about elevated DB load and disk latency.  Here’s what it looked like:

Figure 1: At 10 AM, we saw elevated DB load and disk latency.

12:30 PM EST: Diverting pipeline to S3 instead of EBS, pulling out hair

1:30 PM EST: Frontend offline, AWS incident report

Our workload is very write-heavy, so we first noticed performance problems there, but pretty soon reads made by our frontend were also affected, as a growing fraction of our customer’s data became affected by the mounting EBS problems.  At a certain point, any file I/O to affected EBS volumes would cause processes to enter an uninterruptible state, causing our MySQL servers to hang.  Here’s a view of the impact on our query sharding service:

Figure 2: Impact on our query sharding service.

6 PM EST: Debate whether backup restore or AWS EBS recovery will finish faster

9 PM EST: Back online

AWS started bringing volumes back online that evening.  During the downtime, we continued to collect customer performance data, diverting the pipeline to S3 until our databases came back online. Once the disks were back, we were able to get frontend servers back online, and spun up more pipeline workers to plow through the queued trace backlog as we replayed it from S3. Latency: the functional test of performance metrics You might be surprised by this, but monitoring latency is often the easiest and surest way to catch serious problems.  It’s the functional test of system: if any of the gears in the system being monitored start getting jammed, it will likely manifest in increased latency. However, latency can be noisy—how can we make this measurement more controlled, or to extend my testing metaphor, closer to a unit test?  Using TraceView, you can set alerts not only on the latency of your application, but also on individual layers of the stack, or particular URLs/controllers.  The performance of a predictable query load over time is a great way to detect aberrant database performance, for instance.

Figure 3: Use alerting to detect aberrant database performance.

Alerting on All of the Metrics
When looking at cases of infrastructure degradation, host-level metrics is where the buck stops.  Configuration is usually a pain: install agents on each machine and set thresholds.  We think the best alerts are at the intersection of easy and actionable.  With TraceView, you can set up a single alert and have it cover all hosts in an app.

Related Articles

The 5 Critical Things You Need to Know to Assure Optimal Performance in the Cloud

Verifying Network Performance SLAs

Who’s Managing the Performance of Your Cloud Applications?

More Stories By Dan Kuebrich

Dan Kuebrich is a web performance geek, currently working on Application Performance Management at AppNeta. He was previously a founder of Tracelytics (acquired by AppNeta), and before that worked on AmieStreet/Songza.com.

IoT & Smart Cities Stories
OpsRamp is an enterprise IT operation platform provided by US-based OpsRamp, Inc. It provides SaaS services through support for increasingly complex cloud and hybrid computing environments from system operation to service management. The OpsRamp platform is a SaaS-based, multi-tenant solution that enables enterprise IT organizations and cloud service providers like JBS the flexibility and control they need to manage and monitor today's hybrid, multi-cloud infrastructure, applications, and wor...
Apptio fuels digital business transformation. Technology leaders use Apptio's machine learning to analyze and plan their technology spend so they can invest in products that increase the speed of business and deliver innovation. With Apptio, they translate raw costs, utilization, and billing data into business-centric views that help their organization optimize spending, plan strategically, and drive digital strategy that funds growth of the business. Technology leaders can gather instant recomm...
The Master of Science in Artificial Intelligence (MSAI) provides a comprehensive framework of theory and practice in the emerging field of AI. The program delivers the foundational knowledge needed to explore both key contextual areas and complex technical applications of AI systems. Curriculum incorporates elements of data science, robotics, and machine learning-enabling you to pursue a holistic and interdisciplinary course of study while preparing for a position in AI research, operations, ...
Codete accelerates their clients growth through technological expertise and experience. Codite team works with organizations to meet the challenges that digitalization presents. Their clients include digital start-ups as well as established enterprises in the IT industry. To stay competitive in a highly innovative IT industry, strong R&D departments and bold spin-off initiatives is a must. Codete Data Science and Software Architects teams help corporate clients to stay up to date with the mod...
In his session at 21st Cloud Expo, Raju Shreewastava, founder of Big Data Trunk, provided a fun and simple way to introduce Machine Leaning to anyone and everyone. He solved a machine learning problem and demonstrated an easy way to be able to do machine learning without even coding. Raju Shreewastava is the founder of Big Data Trunk (www.BigDataTrunk.com), a Big Data Training and consulting firm with offices in the United States. He previously led the data warehouse/business intelligence and Bi...
The Japan External Trade Organization (JETRO) is a non-profit organization that provides business support services to companies expanding to Japan. With the support of JETRO's dedicated staff, clients can incorporate their business; receive visa, immigration, and HR support; find dedicated office space; identify local government subsidies; get tailored market studies; and more.
Tapping into blockchain revolution early enough translates into a substantial business competitiveness advantage. Codete comprehensively develops custom, blockchain-based business solutions, founded on the most advanced cryptographic innovations, and striking a balance point between complexity of the technologies used in quickly-changing stack building, business impact, and cost-effectiveness. Codete researches and provides business consultancy in the field of single most thrilling innovative te...
CloudEXPO has been the M&A capital for Cloud companies for more than a decade with memorable acquisition news stories which came out of CloudEXPO expo floor. DevOpsSUMMIT New York faculty member Greg Bledsoe shared his views on IBM's Red Hat acquisition live from NASDAQ floor. Acquisition news was announced during CloudEXPO New York which took place November 12-13, 2019 in New York City.
With the introduction of IoT and Smart Living in every aspect of our lives, one question has become relevant: What are the security implications? To answer this, first we have to look and explore the security models of the technologies that IoT is founded upon. In his session at @ThingsExpo, Nevi Kaja, a Research Engineer at Ford Motor Company, discussed some of the security challenges of the IoT infrastructure and related how these aspects impact Smart Living. The material was delivered interac...
Atmosera delivers modern cloud services that maximize the advantages of cloud-based infrastructures. Offering private, hybrid, and public cloud solutions, Atmosera works closely with customers to engineer, deploy, and operate cloud architectures with advanced services that deliver strategic business outcomes. Atmosera's expertise simplifies the process of cloud transformation and our 20+ years of experience managing complex IT environments provides our customers with the confidence and trust tha...