Category: Technology

There are thousands of distributed services running on millions of servers in Meta’s data centers. Part of ensuring the reliability of those services means making them resilient to power loss events as our data center fleet grows. To help increase resiliency, we built the Power Loss Siren (PLS) — a rack level, low latency, distributed… Continue reading Power Loss Siren: Making Meta resilient to power loss events

Co-author — Balachandar Mariappan An Introduction to Terminology ATF — Available to Fulfill inventoryOn-Hand — Physical amount of Inventory availableSKU — Stock Keeping Unit, which represents a distinct type of item for sale.Location — Representation of a physical location like a store or warehouse where SKU’s are presentLocation Group — A Logical aggregation of typically one or more Locations.Reservation or Inventory Reservation — Reserving a quantity of a SKU. For example:… Continue reading Event Sourcing for an Inventory Availability Solution

We’re tackling the industry-wide issue of scraping by expanding our bug bounty program to reward valid reports of scraping bugs and unprotected data sets. To the best of our knowledge, this is an industry first.  Looking toward the future, we’re also launching new educational opportunities for researchers and hosting our first BountyConEDU — a three-day… Continue reading Charting the future of our bug bounty program

To support the people and communities who use our apps and products, we need to stay in constant contact with them. We want to provide the experiences we offer reliably. We also need to establish trust with the larger community we support. This can be especially challenging in a large-scale, quickly evolving environment like Meta,… Continue reading SLICK: Adopting SLOs for improved reliability

What if we told you that there was a way to dramatically reduce the cost to operate on cloud providers? That’s what we found when we dug into the different data structures offered in Redis. Before we committed to one, we did some research into the difference in memory usage between using HASH versus using… Continue reading Using Redis HASH instead of SET to reduce cache size and operating costs

Building consistent data replicas If you have worked on data-rich software systems, chances are you have worked with a distributed architecture where one part of your system needs access to data owned by another part of the system. Whether that architecture is a modern distributed microservices architecture or a set of stand-alone applications looking to exchange… Continue reading Applying the Micro Batching Pattern to Data Transfer

Restriction Rules: Complementing Salesforce’s Record Access Control Mechanism Introduction If you’ve taken Salesforce Admin 201 training, you might remember learning about Sharing Settings. Sharing Settings include Sharing Models, Criteria Sharing Rules, Manual Sharing, and more. I’m a software engineer on the Record Access Experience team here at Salesforce. When I took this training in 2017,… Continue reading Restriction Rules