Tech Blog Archive

Cloud in Engineering
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Scalability Tuning on a Tess.IO Cluster

Tess.IO is eBay’s new unified cloud infrastructure based on Kubernetes. With more and more applications being deployed on the Tess cluster, the requirements for scalability and capability of the cluster are growing. This article describes how to achieve 5000-node scalability for the tess.IO cluster.

By: Yingnan Zhang
User Experience in Product
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eBay’s Multi-User Account Access is Now Live to all Sellers* in the U.S.

eBay is enabling sellers to better manage their business by securely granting access to employees to create drafts, edit and launch listings on their behalf.

By: Lester Dorman and Rekha Patel
Distributed Systems in Engineering
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eBay Helps Sellers Better Manage and Grow their Business with Multi-User Account Access

Learn about how eBay enabled sellers to grant access to their accounts in a private and secure way.

By: Dave Kamalsky, Karthik Thavamani, Lester Dorman, Mallikarjuna Potta and Rekha Patel
Cloud in Engineering
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Low Latency and High Throughput in CAL Ingress

CAL Ingress, the main component of eBay's Centralized Application Logging (CAL) system, is responsible for collecting, processing, and dispatching application server local logs from thousands of CAL clients in the cloud. This article introduces the whole system architecture design and performance optimization to meet the requirements of low latency and high throughput for huge amounts of traffic.

By: Cristal YU
Developer Tools in Engineering
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eBay OAuth Client Library in Python and Best Practices

To make it easier to integrate with eBay RESTful APIs, eBay provides client SDK libraries in C#, Java, and Python. Learn how to quickly set up the OAuth SDK in Python and learn about eBay OAuth best practices.

By: Catherine Wong
Performance Engineering in Engineering
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eBay's Hyperscale Platforms

In the era of artificial intelligence, machine learning, and cloud technology, data is growing exponentially. eBay data continues to grow, serving more than 182 million buyers and $13.4 billion of transactions completed on mobile devices. Understanding how to manage data is a key to success. System hardware platforms must be designed for the data.

By: Lam Dong
Machine Translation in Research
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Going the Distance — Edit Distance 3

How do you normalize Edit Distance? Some simple ideas to get useful numbers about the changes in your text.

By: Silvio Picinini
Machine Translation in Research
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Going the Distance — Edit Distance 2

If you change a sentence, should you see the characters or words that changed? Edit Distance is back to help you figure this out.

By: Silvio Picinini
Distributed Systems in Engineering
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NuRaft: a Lightweight C++ Raft Core

We are excited to announce the public release of NuRaft, a lightweight C++ Raft core, under the Apache 2.0 open source license. NuRaft is based on the cornerstone C++ Raft implementation, but with various additions and changes, and is the result of over two years of development and testing for production use within eBay for storage server data replication. This post discusses what NuRaft is, and how it can be used.

By: Gene Zhang and Jung-Sang Ahn
Machine Translation in Research
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Going the Distance — Edit Distance 1

What is Edit Distance? How could it be used to measure quality? Find out the basics about this simple metric used for Machine Translation.

By: Silvio Picinini
Performance Engineering in Engineering
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Improving the Speed and Accuracy of the Item Page with Light Service

The item page is one of the most critical pages in the eBay buyer experience. It's where a buyer make their purchase decisions. It's also one of the pages in eBay that gets the most user traffic. The speed of this page and showing accurate information to the user is of great importance. Item fast light service was developed to get critical item information as quickly as possible from the primary source tables. This service is currently used in a number of applications to achieve functionalities that needs 100% accuracy with lightning speed and performance of less than 10ms for an item.

By: Ramesh Periyathambi
Developer Tools in Product
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eBay’s New APIs Enable Developers to Create Innovative Experiences at Scale

Managed Payments, Identity and Marketing APIs available today for developers

By: Gail Frederick
Developer Tools in Engineering
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API Mindset at eBay

APIs allow organizations to give their partners access to data and capabilities, at scale. Extensible and adaptable API ecosystems make it easier for developers to innovate. Building such an ecosystem is a progressive journey with many technical challenges.

By: Tanya Vlahovic
Testing in Research
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Measuring Success with Experimentation

Tips from eBay's Experimentation Science team on how you can best leverage A/B tests to measure the success and health of your product.

By: Tianlin Duan
Big Data in Engineering
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Monitoring at eBay with Druid

At eBay, we switched one of our monitoring tech stacks from legacy homegrown architecture to a Druid-based real-time monitoring system. In this article, we discuss how we transitioned our journey to a new stack and also the benefits it has to offer.

By: Mohan Garadi
WebAssembly in Engineering
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WebAssembly at eBay: A Real-World Use Case

From the time it was announced, WebAssembly caused a huge buzz in the front-end world. The web community readily embraced the idea of taking code written in programming languages other than JavaScript and running that code in the browser. Above all WebAssembly consistently guarantees native speeds much faster than JavaScript. At eBay, we were no different.

By: Pranav Jha and Senthil Padmanabhan
User Experience in Product
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eBay Makes It Easier with Three New Ways for Sellers to Send Offers to Buyers

Sellers can now send offers to buyers with an exclusive discount.

By: Muthu Sundaresan, Nainesh Nayudu and Parin Jogani
OSS in Engineering
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Akutan: A Distributed Knowledge Graph Store

We're excited to announce the public release of Akutan, a distributed knowledge graph store, under the Apache 2.0 open source license. Akutan is the result of four person-years of exploration and engineering effort, so there's a lot to unpack here! This post will discuss what Akutan is, how it's implemented, and why we've chosen to release it as open source.

By: Diego Ongaro and Simon Fell
User Experience in Product
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eBay Users Can Save With More

Volume Pricing saves you money when you buy more of the same thing from eBay sellers.

By: Liv Ellingsen and Steve Neola