There are three things that I’d really appreciate some help understanding:
MapR says it is an Apache Hadoop distribution. Does any of the MapR products include the
While I know there’s no definition of such a thing, as far as I know self-claimed API compatibility is by no means the same thing as Apache Hadoop.
I’m also not aware of any action from ASF on this matter.
MapR says it’s the most complete distribution of Hadoop. The matrix below, from Kirill Grigorchuk’s summary of Altoros’s Hadoop Distributions: Cloudera vs. Hortonworks vs. MapR paper, doesn’t seem to confirm this.
MapR says it is committed to open source. I’ve checked the list of committers for Apache Hadoop, Apache HBase, Apache Pig, and Apache ZooKeeper and except Ted Dunning’s PMC role in Apache ZooKeeper, I couldn’t find any MapR employee listed.
Original title and link: Three questions about MapR and their products. ( ©myNoSQL)
From the GitHub repo:
Cayley is an open-source graph inspired by the graph database behind Freebase and Google’s Knowledge Graph.
- Written in Go
- Easy to get running (3 or 4 commands, below)
- RESTful API * or a REPL if you prefer
- Built-in query editor and visualizer
- Plays well with multiple backend stores: * LevelDB for single-machine storage * MongoDB * In-memory, ephemeral
- Modular design; easy to extend with new languages and backends
- Good test coverage
- Speed, where possible.
✚ What’s interesting is that even if under Google’s GitHub account, the project is not backed by Google.
✚ The Hacker News thread focuses on the existing graph database market.
Original title and link: Cayley: an open-source graph database ( ©myNoSQL)
Big news coming from myNoSQL’s supporters Aerospike:
Aerospike in-memory NoSQL database is now open-source.
Original title and link: Aerospike in-Memory NoSQL database is now Open Source [sponsor] ( ©myNoSQL)
Some interesting changes and new features in RethinkDB 1.13 announced yesterday. Namely:
replacing the protocol buffers-based protocol for a JSON-protocol
- how does the JSON protocol manage the non-JSON data types?
- how fast is a text-based protocol?
notifications about document changes
I’ve always said this was the coolest feature in CouchDB and that every database should support it.
a weird1 new
httpcommand to pull JSON data from the web
I’ve checked again the RethinkDB stability report and I’m not sure that reads as “yep, RethinkDB is finally production ready”.
Knowing the team there, I’m pretty sure this is coming from a use case I’m not seeing. ↩
Original title and link: RethinkDB 1.13: new protocol and push-pull APIs ( ©myNoSQL)