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RethinkDB versus PostgreSQL: my personal experience
News and updates about CoCalc
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 308 posts.
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Delivering Billions of Messages Exactly Once
The single requirement of all data pipelines is that they cannot lose data. Data can usually be delayed or re-ordered–but never dropped.
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Lessons learned from sharding Postgres at Notion
With an effort to make Notion faster and more reliable for years to come — we migrated Notion’s PostgreSQL monolith into a horizontally-partitioned database fleet.
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Creating a Modern OCR Pipeline Using Computer Vision and Deep Learning
Dash knows your context, your team, and your work, so your team can stay organized, easily find and share knowledge, and keep projects secure, all from one place.
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Litestream: Revamped
Bringing in what we learned from LiteFS
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How Discord stores trillions of messages (2023)
Engineer Bo Ingram shares insight into how Discord shoulders its traffic and provides a platform for our users to communicate.
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JPEG XL: How it started, how it’s going
Significance of Apple's support for JPEG XL and what this means for the widespread adoption of this next-generation image compression format.
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Friendlier SQL with DuckDB
DuckDB offers several extensions to the SQL syntax. For a full list of these features, see the Friendly SQL documentation page.
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Backblaze Durability Is Eleven 9s – And Why It Doesn’t Matter
We’ve calculated Backblaze’s storage durability at 99.999999999%. What does that impressively large number mean, and does it actually matter for your data?
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Scaling Django to 8 Billion Page Views
At more than 8 billion page views per month and 45k requests per second, we’ve learned a couple things about delivering comments at scale.
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Pebble: A RocksDB Inspired Key-Value Store Written in Go
Today we’re introducing Pebble, a RocksDB-inspired and RocksDB compatible key-value store written in Go that brings greater stability to CockroachDB.
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Storing OpenAI embeddings in Postgres with pgvector
An example of how to build an AI-powered search engine using OpenAI's embeddings and PostgreSQL.
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YC Stats
We get asked (a lot) for statistics on the YC portfolio about valuation and fundraising. Although these are very imperfect indicators of success, here they are. All of these companies actually went through a YC batch and got their start with us (e.g. we do not include Quora). Also, the YC application for the next…
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Jepsen: MongoDB 3.6.4
MongoDB is a long-time user of Jepsen . Over the past three years, Jepsen has performed several analyses for MongoDB, and MongoDB has integrated an expansive Jepsen test suite into their CI system. In March, MongoDB requested Jepsen perform an analysis on a previously untested configuration: sharded clusters. We also…
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Excel will allow certain auto data conversions to be turned off
Based on your feedback, we've improved the Automatic Data Conversion settings, and made them also available in Excel for Mac.
138
Jepsen: Etcd 3.4.3
The etcd key-value store is a distributed system intended for use as a coordination primitive. Like Zookeeper and Consul , etcd stores a small volume of infrequently-updated state ( by default, up to 8 GB ) in a key-value map, and offers strict-serializable reads, writes and micro-transactions across the entire…
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Debunking the Myth of "Anonymous" Data
Today, almost everything about our lives is digitally recorded and stored somewhere. Each credit card purchase, personal medical diagnosis, and preference about music and books is recorded and then used to predict what we like and dislike, and—ultimately—who we are. This often happens without our...
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Give me /events, not webhooks
Learn about the challenges of webhooks for service-to-service notifications. And why an `/events` endpoint is often preferable.
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AWS Snowmobile – Move Exabytes of Data to the Cloud in Weeks
Moving large amounts of on-premises data to the cloud as part of a migration effort is still more challenging than it should be! Even with high-end connections, moving petabytes or exabytes of film vaults, financial records, satellite imagery, or scientific data across the Internet can take years or decades. On the…
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Querying Parquet with Precision Using DuckDB
DuckDB, a free and open source analytical data management system, can run SQL queries directly on Parquet files and automatically take advantage of the advanced features of the Parquet format.
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Supabase MCP can leak your entire SQL database
Indirect prompt injection through support-ticket data lets an MCP-enabled assistant cross trust boundaries and query private tables with Supabase’s privileged service role.
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Free Postgres databases for small projects
Announcing free Postgres storage on Fly.io.
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A Preview of DuckDB v2.0
DuckDB 2.0 is coming this fall. In this post, we preview its headline features: DuckDB as a server, triggers, the VARIANT type, asynchronous I/O, a new SQL parser, a new storage format, and much more.
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Microsoft acquires Citus Data (YC S11)
Data and analytics are increasingly at the center of digital transformation, with the most leading-edge enterprises leveraging data to drive customer acquisition and satisfaction, long-term strategic planning, and expansion into net new markets. This digital revolution is placing an incredible demand on technology…
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How Discord Stores Billions of Messages (2017)
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.