Meta Engineering Blog

AI for American-produced cement and concrete

Meta is continuing its long-term roadmap to help the construction industry leverage AI to produce high-quality and more sustainable concrete mixes, as well as those exclusively produced in the Unit…

How Precision Time Protocol is being deployed at Meta

Implementing Precision Time Protocol (PTP) at Meta allows us to synchronize the systems that drive our products and services down to nanosecond precision. PTP’s predecessor, Network Time Protocol (…

Bento: Jupyter Notebooks at Meta

This episode of the Meta Tech Podcast is all about Bento, Meta’s internal distribution of Jupyter Notebooks, an open-source web-based computing platform. Bento allows our engineers to mix code, tex…

Simple Precision Time Protocol at Meta

While deploying Precision Time Protocol (PTP) at Meta, we’ve developed a simplified version of the protocol (Simple Precision Time Protocol – SPTP), that can offer the same level of clock syn…

Improving code review time

Code reviews are one of the most important parts of the software development process At Meta we’ve recognized the need to make code reviews as fast as possible without sacrificing quality We’re sha…

Ribbon filter: Practically smaller than Bloom and Xor

What the research is: The Ribbon filter is a new data structure that is more space-efficient than the popular Bloom filters that are widely used for optimizing data retrieval. One of the ways that …

Deploying key transparency at WhatsApp

WhatsApp has launched a new cryptographic security feature to automatically verify a secured connection based on key transparency. The feature requires no additional actions or steps from users an…

Running BGP in large-scale data centers

What the research is: A first-of-its-kind study that details the scalable design, software implementation, and operations of Facebook’s data center routing design, based on Border Gateway Protocol …

Strobelight: A profiling service built on open source technology

We’re sharing details about Strobelight, Meta’s profiling orchestrator. Strobelight combines several technologies, many open source, into a single service that helps engineers at Meta improve effic…

Retrofitting null-safety onto Java at Meta

We developed a new static analysis tool called Nullsafe that is used at Meta to detect NullPointerException (NPE) errors in Java code. Interoperability with legacy code and gradual deployment model…

Building a subsea cable to better connect Africa

Connectivity is at the heart of our mission to give people the power to build community. We are committed to bringing more people online to a faster internet — and with 3.5 billion people globally …

Meta quickly detects silent data corruptions at scale

Silent data corruptions (SDCs), data errors that go undetected by the larger system, are a widespread problem for large-scale infrastructure systems. Left undetected, these types of corruptions can…

How meta built the infrastructure for Threads

On July 5, 2023, Meta launched Threads, the newest product in our family of apps, to an unprecedented success that saw it garner over 100 million sign ups in its first five days. A small, nimble te…

How WhatsApp enables multi-device capability

For years, people have been asking us to create a true multi-device experience that allows people to use WhatsApp on other devices without requiring a smartphone connection. Today, we’re announcing…

Velox: An open-source unified execution engine

Making aerial fiber deployment faster and more efficient

Globally, more than 3.5 billion people are still not connected to the internet. With average data usage per person growing 20 to 30 percent annually, legacy bandwidth-limited technologies have been…

Facebook reveals 'SuperCell' tower to increase connectivity in rural areas

As part of our efforts to help expand connectivity around the world, Facebook Connectivity has been prototyping SuperCell, a wide-area coverage solution for increasing mobile connectivity in rural …

Indexing Code at Scale with Glean

We’re sharing details about Glean, Meta’s open source system for collecting, deriving, and working with facts about source code. In this blog post we’ll talk about why a system like Glean is import…

Scribe: Transporting petabytes per hour via a distributed, buffered queueing

Our hardware infrastructure comprises millions of machines, all of which generate logs that we need to process, store, and serve. The total size of these logs is several petabytes every hour. The o…

MemLab: An open source framework for finding JavaScript memory leaks

We’ve open-sourced MemLab, a JavaScript memory testing framework that automates memory leak detection. Finding and addressing the root cause of memory leaks is important for delivering a quality us…

How Facebook deals with PCIe faults to keep its data centers running reliably

Peripheral component interconnect express (PCIe) hardware continues to push the boundaries of computing thanks to advances in transfer speeds, the number of available lanes for simultaneous data de…

Writing and linting Python at scale

Fixit is dead! Long live Fixit 2 – the latest version of our open-source auto-fixing linter. Fixit 2 allows developers to efficiently build custom lint rules and perform auto-fixes for their codeba…

Hydra: A framework that simplifies development of complex applications

What it is: Hydra is a lightweight framework that simplifies the development of Python applications, especially complex ones, by introducing the ability to compose and override configurations. Hydr…

Automating Dead Code Cleanup

Meta’s Systematic Code and Asset Removal Framework (SCARF) has a subsystem for identifying and removing dead code. SCARF combines static and dynamic analysis of programs to detect dead code from bo…

Leveraging AI for efficient incident response

We’re sharing how we streamline system reliability investigations using a new AI-assisted root cause analysis system. The system uses a combination of heuristic-based retrieval and large language m…

Maintaining large-scale AI capacity at Meta

Meta is currently operating many data centers with GPU training clusters across the world. Our data centers are the backbone of our operations, meticulously designed to support the scaling demands …

Data-Transfer-Project

Since 2010, we have offered Download Your Information to allow people who use our services to access a secure copy of the data they have shared with Facebook. In 2018, we announced our participatio…

Fighting spam with Haskell at Meta (2015)

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Making messaging interoperability with third parties safe for users in Europe

To comply with a new EU law, the Digital Markets Act (DMA), which comes into force on March 7th, we’ve made major changes to WhatsApp and Messenger to enable interoperability with third-party messa…