Month: November 2022

UPM is our internal standalone library to perform static analysis of SQL code and enhance SQL authoring.  UPM takes SQL code as input and represents it as a data structure called a semantic tree. Infrastructure teams at Meta leverage UPM to build SQL linters, catch user mistakes in SQL code, and perform data lineage analysis… Continue reading Enabling static analysis of SQL queries 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 were key to Nullsafe’s wide adoption and allowed us to recover some null-safety properties in the context of an otherwise null-unsafe language in a multimillion-line… Continue reading Retrofitting null-safety onto Java at Meta

Meta is deploying a timing protocol, Precision Time Protocol (PTP), that will offer new levels of accuracy and precision to our networks and data centers. We believe PTP will become the global standard for keeping time in computer networks. PTP will benefit today’s products and services and will be a foundational technology behind the development… Continue reading PTP: Timing accuracy and precision for the future of computing

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 (NTP), provided us with millisecond precision, but as we scale to more advanced systems on our way to building the next computing platform, the metaverse and AI,… Continue reading How Precision Time Protocol is being deployed at Meta

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 sharing several tools and steps we’ve taken at Meta to reduce the time waiting for code reviews When done well, code reviews can… Continue reading Move faster, wait less: Improving code review time at Meta

Sapling is a new Git-compatible source control client. Sapling emphasizes usability while also scaling to the largest repositories in the world. ReviewStack is a demonstration code review UI for GitHub pull requests that integrates with Sapling to make reviewing stacks of commits easy. You can get started using Sapling today.  Source control is one of… Continue reading Sapling: Source control that’s user-friendly and scalable

We’re sharing Tulip, a binary serialization protocol supporting schema evolution.  Tulip assists with data schematization by addressing protocol reliability and other issues simultaneously.  It replaces multiple legacy formats used in Meta’s data platform and has achieved significant performance and efficiency gains. There are numerous heterogeneous services, such as warehouse data storage and various real-time systems,… Continue reading Tulip: Schematizing Meta’s data platform