Tag: cluster

Feed: Hadoop Dev. Author: Nailah Bissoon. The intention of this blog is to outline one of the procedures that can be taken to backup the Big SQL database across the nodes in the cluster. The procedure outlined here is for offline backup and restore which means that the backup/restore is taken when no active users are logged into the cluster. The backup of the Big SQL database should be scheduled in off peak hours. The restore is intended to be done only in case of emergencies for example if a table is accidentally deleted. The steps outlined here are for ... Read More

Feed: Hadoop Dev. Author: Nailah Bissoon. In the event that a Big SQL cluster goes down due to disaster, applications can switch to a secondary cluster where the meta-data and distributed filesystem data is replicated. The IBM Big SQL and Big Replicate solution automates DR for both meta-data and distributed filesystem data. This solution replicates the data files to the DR cluster as well as the Big SQL and Hive meta-data. This blog outlines the steps to setup a Big SQL DR cluster without Big Replicate. Other components such as Hive, HDFS and HBase also need to be considered for ... Read More

Feed: Kamran Agayev's Oracle Blog. Few days ago, I was testing some ASM parameters in my 3 nodes 12.2 Clusterware environment and used ASM_PREFERRED_READ_FAILURE_GROUPS parameter to see how I can force ASM to read specific failure group. Testings were successfull but I didn’t know that this parameter is deprecated in 12.2, and beside that, I didn’t imagine that it might cause me a downtime and prevent Clusterware to start. Here’s the scenario that you can try in your test environment. First of all, I set this parameter to the failure group and then resetted it back: SQL> alter system set ASM_PREFERRED_READ_FAILURE_GROUPS=”; ... Read More

Feed: Cambridge Intelligence. Author: Andrew Disney. Our last blog post was the first of three exploring real world applications for graph visualization.In the second in this series, we’ll explore the role of graph visualization for cyber security. It coincides with our involvement in the UK-NL Cyber Security Showcase at the World Trade Center in The Hague. 50 companies from the UK and Netherlands will showcase innovative solutions to tackle the cyber security challenge. There’s still time to register for your free ticket.Use cases for graph visualization: Cyber SecurityLast time we reviewed two of the older commercial uses for graph visualization: ... Read More

Feed: Planet MySQL; Author: Petri Virsunen; Join us for this training session where we discuss tools for backing up a MySQL database within Tungsten, and how Tungsten makes it easy to re-provision databases and recover a cluster. Tuesday, 10/17 at 9:00 am PT/12:00 pm ET. Sign up today at http://bit.ly/2hCkaPmIn this session we will cover: Methods and tools for taking a backup Verifying the backup contains the last binary log position, and the importance of having this Restoring backups into a cluster Provisioning slaves from an existing datasource This training is for all engineers using Tungsten Clustering and will explain the ... Read More

Feed: Redis Labs. Author: Kyle Davis. Exploring the performance of Redis Enterprise with Flash memory extension. With Redis Enterprise, we recently enabled the ability to extend your RAM based storage into flash memory. Don’t confuse this with some form of persistence, this is a way to let Redis break out of the bounds of the server RAM and into Flash storage as needed. With the advances in Flash memory (NVMe-based SSD storage), the performance becomes very viable, although not quite as quick as RAM alone. This allows you to have hybrid storage – data moves between fast RAM and Flash ... Read More

Feed: AWS Partner Network (APN) Blog. Author: Ian Scofield. By Ian Scofield, Juan Villa, and Mike Ruiz This is the second post in our series documenting our project to fix issues with the GameDay architecture by using tenets of the AWS Well-Architected Framework. See Part 1 of the post for an overview of the process, a description of the initial review, and a list of the critical findings identified by the review team. In this post, we’ll cover the steps we took to fix the critical findings identified by the review team. In future posts, we will share our plans ... Read More

Feed: CDH – Cloudera Engineering Blog. Author: Cy Jervis. With the abundance of deep learning frameworks available today, it can be difficult to know what to choose for any particular application. Given the contrasting strengths and weaknesses of these frameworks, the ability to work with and switch between more than one is particularly important. Recent Cloudera blogs have shown how examples of applying deep learning on the Cloudera ecosystem using popular frameworks Deeplearning4j, BigDL, and Keras+TensorFlow. This post extends those examples by providing details on performing image recognition with convolutional neural networks using the Apache MXNet (incubating) framework, leveraging Cloudera’s ... Read More

Feed: AWS Big Data Blog. Managing database users though federation allows you to manage authentication and authorization procedures centrally. Amazon Redshift now supports database authentication with IAM, enabling user authentication though enterprise federation. No need to manage separate database users and passwords to further ease the database administration. You can now manage users outside of AWS and authenticate them for access to an Amazon Redshift data warehouse. Do this by integrating IAM authentication and a third-party SAML-2.0 identity provider (IdP), such as AD FS, PingFederate, or Okta. In addition, database users can also be automatically created at their first login ... Read More

Feed: Hadoop Dev. Author: Nailah Bissoon. The intention of this blog is to outline the process that can be taken to clone a Big SQL database from one cluster to another. The procedure outlined here relies on taking an offline backup of the Big SQL database on one cluster and restoring it to another. The backup of the Big SQL database should be scheduled in off peak hours as it requires a database deactivation. Important – The two clusters must be identical with the same version of Big SQL, OS level, number of nodes and Big SQL configuration. At the ... Read More