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New
The latest blog posts to take off on Hacker News. 141 posts.
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Wolfram Alpha’s New Data about Pokémon
It's not all math & science at Wolfram. Today's pop topic: Pokémon! Catch their abilities, stats, icons, curves, creators, games, movies—even X & Y.
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The trouble with timestamps
Some folks have asked whether Cassandra or Riak in last-write-wins mode are monotonically consistent, or whether they can guarantee read-your-writes, and so on. This is a fascinating question, and leads to all sorts of interesting properties about clocks and causality.
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Call me maybe: Cassandra
Cassandra is a Dynamo system; like Riak, it divides a hash ring into a several chunks, and keeps N replicas of each chunk on different nodes. It uses tunable quorums, hinted handoff, and active anti-entropy to keep replicas up to date. Unlike the Dynamo paper and some of its peers, Cassandra eschews vector clocks in…
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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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Command-line tools for data science
Blog article by Jeroen Janssens. Sep 19, 2013. 21 min read. Data science is OSEMN (pronounced as awesome). That is, it involves Obtaining, Scrubbing, Exploring, Modelling, and iNterpreting data. As a data scientist, I spend quite a bit of time on the command-line, especially when there’s data to be obtained, scrubbed…
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OpenZFS launch
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Don't use Hadoop when your data isn't that big
"So, how much experience do you have with Big Data and Hadoop?" they asked me. I told them that I use Hadoop all the time, but rarely for jobs larger than a few TB. I'm basically a big data neophite - I know the concepts, I've written code, but never at scale.
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RethinkDB 1.9: Indexing and query runtime performance
This release includes massive enhancements that improve performance of many queries by orders of magnitude. See the full list of enhancements , or watch Joe Doliner ( @jdoliner ), an engineer at RethinkDB, talk about the 1.9 release in this two-minute video:
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Postgresql 9.3 Released
The PostgreSQL Global Development Group announces the release of PostgreSQL 9.3, the latest version of the world's leading open source …
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Why Cassandra Doesn't Need Vector Clocks
Deepening watsonx capabilities to address enterprise gen AI data needs with DataStax.
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Logstash joins Elasticsearch
Logstash is an open source data collection engine with real-time pipelining capabilities. Logstash can dynamically unify data from disparate sources and...
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SQLite 3.8.0 Release with next-generation query planner
Beginning with this release, SQLite will not compile on Windows version prior to Windows Vista (circa 2007), due to a switch to using Slim Reader/Writer Locks (SRWLs) which are faster but which are not available on WindowsXP and earlier.
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PostgreSQL Basics by Example
Connecting to a database 1 2 $ psql postgres # the default database $ psql database_name Connecting as a specific user 1 2 $ psql postgres john $ …
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RethinkDB 1.8: date support, querying nested objects, 8x disk usage improvements
Michael Lucy ( @mlucy ), an engineer at RethinkDB, introduces these new features in this two-minute video:
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A Look Inside Our 210TB 2012 Web Corpus
Want to know more detail about what data is in the 2012 Common Crawl corpus without running a job? Now you can thanks to Sebastian Spiegler!