jm + apache + open-source   13

[LEGAL-303] ASF, RocksDB, and Facebook's BSD+patent grant licensing
Facebook's licensing includes a "nuclear option" if a user acts in a way interpreted by Facebook as competing with them; the ASF has marked the license as "Category-X", and may not be included in Apache projects as a result. Looks like RocksDB are going to relicense as dual GPLv2/ASL2 to clear this up, but React.js has not shown any plans to do so yet
react  rocksdb  licensing  asl2  apache  asf  facebook  open-source  patents 
9 weeks ago by jm
Open-sourcing PalDB, a lightweight companion for storing side data
a new LinkedIn open source data store, for write-once/read-mainly side data, java, Apache licensed.

RocksDB discussion: https://www.facebook.com/groups/rocksdb.dev/permalink/834956096602906/
linkedin  open-source  storage  side-data  data  config  paldb  java  apache  databases 
october 2015 by jm
excellent offline mapping app MAPS.ME goes open source
"MAPS.ME is an open source cross-platform offline maps application, built on top of crowd-sourced OpenStreetMap data. It was publicly released for iOS and Android."
maps.me  mapping  maps  open-source  apache  ios  android  mobile 
september 2015 by jm
Stormpot
an object pooling library for Java. Use it to recycle objects that are expensive to create. The library will take care of creating and destroying your objects in the background. Stormpot is very mature, is used in production, and has done over a trillion claim-release cycles in testing. It is faster and scales better than any competing pool.


Apache-licensed, and extremely fast: https://medium.com/@chrisvest/released-stormpot-2-4-eeab4aec86d0
java  stormpot  object-pooling  object-pools  pools  allocation  gc  open-source  apache  performance 
september 2015 by jm
FelixGV/tehuti
Felix says:

'Like I said, I'd like to move it to a more general / non-personal repo in the future, but haven't had the time yet. Anyway, you can still browse the code there for now. It is not a big code base so not that hard to wrap one's mind around it.

It is Apache licensed and both Kafka and Voldemort are using it so I would say it is pretty self-contained (although Kafka has not moved to Tehuti proper, it is essentially the same code they're using, minus a few small fixes missing that we added).

Tehuti is a bit lower level than CodaHale (i.e.: you need to choose exactly which stats you want to measure and the boundaries of your histograms), but this is the type of stuff you would build a wrapper for and then re-use within your code base. For example: the Voldemort RequestCounter class.'
asl2  apache  open-source  tehuti  metrics  percentiles  quantiles  statistics  measurement  latency  kafka  voldemort  linkedin 
october 2014 by jm
SpamAssassin 3.4.0 released
Good to see the guys cracking on without me ;)

'2014-02-11: SpamAssassin 3.4.0 has been released adding native support for IPv6, improved DNS Blocklist technology and support for massively-scalable Bayesian filtering using the Redis backend.'
antispam  open-source  spamassassin  apache 
february 2014 by jm
Apache Curator
Netflix open-source library to make using ZooKeeper from Java less of a PITA. I really wish I'd used this now, having reimplemented some key parts of it after failures in prod ;)
zookeeper  netflix  apache  curator  java  libraries  open-source 
january 2014 by jm
js-hll
Good UI for exploration of HyperLogLog set intersections and unions.
One of the first things that we wanted to do with HyperLogLog when we first started playing with it was to support and expose it natively in the browser. The thought of allowing users to directly interact with these structures -- perform arbitrary unions and intersections on effectively unbounded sets all on the client -- was exhilarating to us. [...] we are pleased to announce the open-source release of AK’s HyperLogLog implementation for JavaScript, js-hll. We are releasing this code under the Apache License, Version 2.0.

We knew that we couldn’t just release a bunch of JavaScript code without allowing you to see it in action — that would be a crime. We passed a few ideas around and the one that kept bubbling to the top was a way to kill two birds with one stone. We wanted something that would showcase what you can do with HLL in the browser and give us a tool for explaining HLLs. It is typical for us to explain how HLL intersections work using a Venn diagram. You draw some overlapping circles with a border that represents the error and you talk about how if that border is close to or larger than the intersection then you can’t say much about the size of that intersection. This works just ok on a whiteboard but what you really want is to just build a visualization that allows you to select from some sets and see the overlap. Maybe even play with the precision a little bit to see how that changes the result. Well, we did just that!
javascript  ui  hll  hyperloglog  algorithms  sketching  js  sets  intersection  union  apache  open-source 
june 2013 by jm
Riak CS is now ASL2 open source
'Organizations and users can now access the source code on Github and download the latest packages from the downloads page. Also, today, we announced that Riak CS Enterprise is now available as commercial licensed software, featuring multi-datacenter replication technology and 24×7 Basho customer support.'
riak  riak-cs  nosql  storage  basho  open-source  github  apache  asl2 
march 2013 by jm
Cubism.js
'a D3 plugin for visualizing time series. Use Cubism to construct better realtime dashboards.' Apache-licensed; nice realtime update style; overlays multiple data sources well. I think I now have a good use-case for this
javascript  library  visualization  dataviz  tsd  data  apache  open-source 
april 2012 by jm
Lucene Utilities and Bloom Filters - Greplin:tech
'Storing 50,000 2.5KB items in a traditional hash set requires over 125MB, but if you're willing to accept a 1-in-10,000 false positive rate on lookups, [this] bloom filter requires under 500KB' - interesting variation on the basic concept.  Java, Apache-licensed
search  bloom-filters  greplin  open-source  apache  false-positives  from delicious
april 2011 by jm
Launchpad is now open source
Canonical _finally_ open source (under the AGPL) their bug tracker/project hosting platform. yay! here's hoping it's reasonably easy to deploy. maybe it would be viable for the ASF... hmm
canonical  launchpad  open-source  apache  hosting  projects  ubuntu  agpl 
july 2009 by jm

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