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Building Netflix’s Distributed Tracing Infrastructure

The Netflix TechBlog

which is difficult when troubleshooting distributed systems. Reconstructing a streaming session was a tedious and time consuming process that involved tracing all interactions (requests) between the Netflix app, our Content Delivery Network (CDN), and backend microservices. Stream Processing: to sample or not to sample trace data?

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The Speed of Time

Brendan Gregg

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. What about short-lived processes, like a service restarting in a loop? Microbenchmark os::javaTimeMillis() on both systems. Running this on the two systems saw similar results. cat /sys/devices/system/clocksource/clocksource0/current_clocksource.

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A look behind the scenes of AWS Lambda and our new Lambda monitoring extension

Dynatrace

since 2017, and many customers have used it with great success while we collected requirements for the next iteration of our Lambda extension. In theory, an existing code module or agent can be used to monitor a Lambda function if there’s a way to load it into the running Lambda process. Why metrics alone aren’t enough.

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PostgreSQL vs. Oracle: Difference in Costs, Ease of Use & Functionality

Scalegrid

Oracle Database is a commercial, proprietary multi-model database management system produced by Oracle Corporation, and the largest relational database management system (RDBMS) in the world. Compare ease of use across compatibility, extensions, tuning, operating systems, languages and support providers. Comparison Overview.

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The Performance Inequality Gap, 2021

Alex Russell

TL;DR: A lot has changed since 2017 when we last estimated a global baseline resource per-page resource budget of 130-170KiB. To update our global baseline from 2017, we want to update our priors on a few dimensions: The evolved device landscape. Advances in browser content processing. The Moto G4 , for example. Hard Reset.

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Virtual consensus in Delos

The Morning Paper

Back in 2017 the engineering team at Facebook had a problem. While ultimately this new system should be able to take advantage of the latest advances in consensus for improved performance, that’s not realistic given a 6-9 month in-production target. replacing Paxos with Raft), or they could be shims over external storage systems.

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Is MongoDB Open Source? Is Planet Earth Flat?

Percona

Instead of relational (SQL) databases defined primarily through a hierarchy of related sets via tables and columns, their non-relational structure used a system of collections and documents. 2017: MongoDB goes public, trading as MDB. They came up with a horizontally scalable NoSQL database. looking out for MongoDB Inc.