Tag: partition

Feed: Recent Announcements. Today, we're excited to announce that Amazon Athena supports AWS Glue Data Catalog partition indexes to optimize query planning and reduce query runtime. When you query a table containing a large number of partitions, Athena retrieves the available partitions from the AWS Glue Data Catalog and determines which are required by your query. As new partitions are added, the time needed to retrieve the partitions increases and can cause query runtime to increase. AWS Glue Data Catalog allows customers to create partition indexes which reduce the time required to retrieve and filter partition metadata on tables with tens ... Read More

Feed: AWS Big Data Blog. The AWS Glue Data Catalog provides partition indexes to accelerate queries on highly partitioned tables. In the post Improve query performance using AWS Glue partition indexes, we demonstrated how partition indexes reduce the time it takes to fetch partition information during the planning phase of queries run on Amazon EMR, Amazon Redshift Spectrum, and AWS Glue extract, transform, and load (ETL) jobs. We’re pleased to announce Amazon Athena support for AWS Glue Data Catalog partition indexes. You can use the same indexes configured for Amazon EMR, Redshift Spectrum, and AWS Glue ETL jobs with Athena ... Read More

Feed: SAS Blogs. Author: Rick Wicklin. I previously wrote about one way to solve the partition problem in SAS. In the partition problem, you divide (or partition) a set of N items into two groups of size k and N-k such that the sum of the items' weights is the same in each group. For example, if the weights of six items are X = {0.4, 1.0, 1.2, 1.7, 2.6, 2.7} and k=3, you can put the weights {0.4, 1.7, 2.7} in one group and the weights {1.0, 1.2, 2.6} in the other group. Both groups contain 4.8 ... Read More

Feed: SAS Blogs. Author: Rick Wicklin. Photograph by Poussin Jean, license CC BY-SA 3.0, via Wikimedia Commons The partition problem has many variations, but recently I encountered it as an interactive puzzle on a computer. (Try a similar game yourself!) The player is presented with an old-fashioned pan-balance scale and a set of objects of different weights. The challenge is to divide (or partition) the objects into two group. You put one group of weights on one side of the scale and the remaining group on the other side so that the scale balances. Here's a canonical ... Read More

Feed: AWS Big Data Blog. While creating data lakes on the cloud, the data catalog is crucial to centralize metadata and make the data visible, searchable, and queryable for users. With the recent exponential growth of data volume, it becomes much more important to optimize data layout and maintain the metadata on cloud storage to keep the value of data lakes. Partitioning has emerged as an important technique for optimizing data layout so that the data can be queried efficiently by a variety of analytic engines. Data is organized in a hierarchical directory structure based on the distinct values of ... Read More

Feed: AWS Big Data Blog. This post is co-written with Steven Wasserman of Vertex, Inc. Amazon Athena is an interactive query service that makes it easy to analyze data stored in Amazon Simple Storage Service (Amazon S3) using standard SQL. Athena is serverless, so there is no infrastructure to manage, and you pay only for the queries that you run. Athena is easy to use—simply point to your data in Amazon S3, define the schema, and start querying using standard SQL. Athena has added support for partition projection, a new functionality that you can use to speed up query processing ... Read More

Feed: R-bloggers. Author: finnstats. [This article was first published on Methods – finnstats, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. Naive Bayes Classification in R, In this tutorial, we are going to discuss the prediction model based on Naive Bayes classification. Naive Bayes is a classification technique based on Bayes’ Theorem with an assumption of independence among predictors. The Naive Bayes model is easy to build and particularly useful for very large ... Read More

Feed: R-bloggers. Author: finnstats. [This article was first published on Methods – finnstats, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. Neural Network in R, Neural Network is just like a human nervous system, which is made up of interconnected neurons, in other words, a neural network is made up of interconnected information processing units. The neural network draws from the parallel processing of information, which is the strength of this method. A ... Read More

Feed: Recent Announcements. You can now quickly and conveniently copy Amazon Machine Images (AMIs) to AWS GovCloud (US) Regions, AWS China Regions and other AWS regions (also known as partitions) to ensure that your AMIs are available and consistent globally. Previously, to copy AMIs across these AWS regions, you had to rebuild the AMI in each of them. These partitions enabled data isolation but often made this copy process complex, time-consuming and expensive. With this feature, you no longer need to maintain complex processes to duplicate AMIs across partitions. This feature provides a packaged format that allows AMIs of size ... Read More

Feed: AWS Big Data Blog. The global wearables market grew 35.1% year over year during the third quarter of 2020, with total shipments reaching 125 million units according to new data from the International Data Corporation (IDC) Worldwide Quarterly Wearable Device Tracker. The surge was driven by seasonality, new product launches, and the health concerns during the global pandemic. Given the proliferation of smart watches and wristbands, we felt that this was a practical device to investigate to provide heart monitoring. All smart watches have an embedded Bluetooth communication system to receive and transmit data at various ranges. Remote monitoring ... Read More