Tag: object

Feed: Planet PostgreSQL. The question was asked relatively recently on irc. And it proved to be non-trivial. Surely, if you want to have one row per category (one address per user), it's trivial – add user_id column to addresses, make it unique, and we're done. But what if we want to allow five addresses? Or five thousands? Let's see. Obviously we have to start with some table. Let's stick with addresses. Since I don't really care about other fields, it will be simple: CREATE TABLE users ( id text NOT NULL, PRIMARY KEY (id) );   INSERT INTO users (id) ... Read More

Feed: AWS Compute Blog. Author: James Beswick. Customers use AWS Lambda to build a wide range of applications, including mission-critical and compute-intensive applications. The most demanding workloads include machine learning inferencing, media processing, high performance computing (HPC), scientific simulations, and financial modeling. With the release of Advanced Vector Extensions 2 (AVX2) support for Lambda, builders can benefit from improved performance for these types of applications. Overview This blog post explains AVX2 and how you can take advantage of this instruction set in your Lambda functions. I walk through an example of how to enhance performance of a typical use case ... Read More

Feed: AWS Compute Blog. Author: Benjamin Smith. AWS Step Functions now integrates with Amazon API Gateway to enable backend orchestration with minimal code and built-in error handling. API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. These APIs enable applications to access data, business logic, or functionality from your backend services. Step Functions allows you to build resilient serverless orchestration workflows with AWS services such as AWS Lambda, Amazon SNS, Amazon DynamoDB, and more. AWS Step Functions integrates with a number of services natively. Using Amazon ... Read More

Feed: R-bloggers. Author: Nathaniel Schmucker. Introduction This is part 1 of a 4 part series on how to build maps using R. How to load geospatial data into your workspace and prepare it for visualization How to make static maps using ggplot2 How to make interactive maps (pan, zoom, click) using leaflet How to add interactive maps to a Shiny dashboard One of the benefits of R is its large ecosystem of packages developed and maintained by individuals and teams, and available to the general public via CRAN. The downside of this, however, is that it is sometimes difficult for ... Read More

Feed: R-bloggers. Author: Learning Machines. xkcd webcomics is one of the institutions of the internet, especially for the nerd community. If you want to learn how to fetch JSON data from a REST API, download a file from the internet and display a PNG file in a ultra-simple example, read on! Many services on the internet provide a web service so that it is easier for machines to get access to their data. The access point is called an Application Programming Interface (API) and there are different types of APIs. One especially widespread type is known under the name REST ... Read More

Feed: Planet MySQL; Author: Vitess; IntroductionIn this blog, I would like to explore Vitess Operator for Kubernetes. This post demonstrates the sample implementation of Vitess in Kubernetes topology. I also explore common DBA tasks by demonstrating how they are handled in the Vitess ecosystem. Vitess, out of the box, comes with a lot of tools and utilities that one has to either incorporate or develop to manage MySQL topology. Let’s take a look at the capabilities of Vitess in these areas and demonstrate how they are performed under the operator realm.PrerequisitesGKE AccountKubectlMySQL ClientInstall vtctlclient locallygo get vitess.io/vitess/go/cmd/vtctlclientDownload the Operator example ... Read More

Feed: CronJ. Author: Nupur Pal; Introduction to AI and Video AnalyticsAI is a renowned term these days. Whether you are at home or at work, you find yourself accompanied by this technology. It has made machines a helping hand for us. With its algorithms, machines can think, reason and solve problems like us.  And hence uses of AI stops at nothing. Near to all the industries are using this technology to benefit themselves.This modern branch of computer science is evolving. It focuses on creating machines who can perform human tasks without our involvement. When combined with IoT and analytics software ... Read More

Feed: Recent Announcements. The AWS Snowball service is now available in the AWS Africa (Cape Town) Region. AWS Snowball, a member of the AWS Snow Family, is an edge computing, data migration, and edge storage device that comes in two options. Snowball Edge Storage Optimized devices provide 80 TB of Amazon S3 object storage and optional compute with 40 vCPUs. They are well suited for local storage and large-scale data transfer. Snowball Edge Compute Optimized devices provide 52 vCPUs, 7.68 TB of NVMe SSD storage, 42 TB of HDD storage, 256 GB of RAM, and an optional GPU for use cases ... Read More

Feed: Blog – Hazelcast. Author: Rafal Leszko. You want to build a Kubernetes Operator for your software. Which tool to choose from? Operator SDK with Helm, Ansible, or Go? Or maybe start from scratch with Python, Java, or any other programming language? In this blog post, I discuss different approaches to writing Kubernetes Operators and list each solution’s pros and cons. All that to help you decide which tool is the right one for you! You can find the source code for this blog post here. Introduction Kubernetes Operator is an application that watches a custom Kubernetes resource and performs ... Read More

Feed: Planet MySQL; Author: MySQL Server Dev Team; All together now Let’s now put together all that we’ve learned in InnoDB Data Locking – Part 2 “Locks” about table and record locks to understand following situation: mysql> BEGIN; Query OK, 0 rows affected (0.00 sec) mysql> SELECT * FROM t FOR SHARE; +----+ | id | +----+ | 5 | | 10 | | 42 | +----+ 3 rows in set (0.00 sec) mysql> DELETE FROM t WHERE id=10; Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO t VALUES (4); ... Read More