At Dropbox, we are building smart features that use machine intelligence to help reduce people’s busywork. Since introducing content suggestions, which we described in our previous blog post, we have been improving the underlying infrastructure and machine learning algorithms that power content suggestions.
One new challenge we faced during this iteration of content suggestions was the disparate types of content we wanted to support. In Dropbox, we have various kinds of content—files, folders, Google Docs, Microsoft Office documents, and our own Dropbox Paper.
As we laid out in our blog post introducing DBXi, Dropbox is building features to help users stay focused on what matters. Searching through your content can be tedious, so we built content suggestions to make it easier to find the files you need, when you need them.
We’ve built this feature using modern machine learning (ML) techniques, but the process to get here started with a simple question: how do people find their files? What kinds of behavior patterns are most common? We hypothesized the following two categories would be most prevalent:
- Recent files: The files you need are often the ones you’ve been using most recently.
In our previous blog posts, we talked about how we updated the Dropbox search engine to add intelligence into our users’ workflow, and how we built our optical character recognition (OCR) pipeline. One of the most impactful benefits that users will see from these changes is that users on Dropbox Professional and Dropbox Business Advanced and Enterprise plans can search for English text within images and PDFs using a system we’re describing as automatic image text recognition.
The potential benefit of automatically recognizing text in images (including PDFs containing images) is tremendous.
In our previous post, we discussed the architecture of our new search engine, named Nautilus, and its use of machine intelligence to scale our search–ranking and content–understanding models. Along with best–in–class performance, scalability, and reliability, we also provided a foundation for implementing intelligent document ranking and retrieval features. This flexible system allows our engineers to easily customize the document–indexing and query–processing pipelines while maintaining strong safeguards to preserve the privacy of our users’ data.
In this post, we will discuss the process that we undertook to ensure optimal performance and reliability.
Each of the hundreds of our search leaves runs our retrieval engine,
Over the last few months, the Search Infrastructure engineering team at Dropbox has been busy releasing a new full-text search engine called Nautilus, as a replacement for our previous search engine.
Search presents a unique challenge when it comes to Dropbox due to our massive scale—with hundreds of billions of pieces of content—and also due to the need for providing a personalized search experience to each of our 500M+ registered users. It’s personalized in multiple ways: not only does each user have access to a different set of documents, but users also have different preferences and behaviors in how they search.
Our workdays are getting noisier. Never-ending emails, text messages, constant notifications from more apps and more platforms—it’s disruptive and distracting. And then there’s content. All kinds of documents, spreadsheets, presentations, videos, and photos. Industry research shows that employees at larger organizations use an average of 36 cloud services at work, including tools for productivity, project management, communication, and storage. This information overload is a key source of pain for people at work—and a prime opportunity to leverage the help of machine intelligence.
How do we define machine intelligence?
When we talk about machine intelligence at Dropbox,