In 4 years of writing this blog I haven’t seen such a prolific month:
- Apache Hadoop 2.2.0 (more links here)
- Apache HBase 0.96 (here and here)
- Apache Hive 0.12 (more links here)
- Apache Ambari 1.4.1
- Apache Pig 0.12
- Apache Oozie 4.0.0
- Plus Presto.
Actually I don’t think I’ve ever seen such an ecosystem like the one created around Hadoop.
Original title and link: A prolific season for Hadoop and its ecosystem ( ©myNoSQL)
For several years, Hadapt and Hive were the only SQL-on-Hadoop solutions. However, as more and more people began to understand the problems and inherent waste of the database connector approach, a preponderance of SQL-on-Hadoop solutions entered t…
Yes, this post by Daniel Abadi is a bit self-serving, but his premise DEFINITELY holds. Here’s the ‘money quote’:
Unfortunately, all current SQL-on-Hadoop solutions, including Hive, Impala, Stinger, and even Hadapt (until recently) significantly restrict this flexibility. For all of these solutions, if you want to issue queries against your data in Hadoop, the first thing you need to do is define a schema for your data. If you don’t understand your data well enough to define a schema, or you don’t know what attributes or types you have, or generally want to further process your data before defining a schema, none of these SQL-on-Hadoop solutions will work for you. No schema means no querying.
New wireless devices communicate without batteries.
University of Washington Engineers have developed wireless transmitters and receivers which are able to communicate over short distances without an in-built energy source.
Instead of a battery, the devices use a technique known as ‘ambient backscatter’, where they detect, harness, and reflect TV signals to create a sort of “morse code” which can transmit small amounts of data between the devices.
During testing the devices were used in a variety of indoor and outdoor locations around Seattle, and successfully communicated with each other at distances of up to 2.5 feet at 1 kilobit per second. That’s enough to send information such as a sensor readings, text messages and contact information.
Potential uses for the devices include allowing wearable devices such as smartwatches to send text messages or emails without power, or as a secondary method of communication when their batteries run out. It could also allow battery-free wireless sensor networks, for example, sensors placed in a bridge could monitor the health of the concrete and steel, then send an alert if one of the sensors picks up a hairline crack.