Tag: high availability

Feed: Hadoop – Cloudera Engineering Blog. Author: Sandy Ryza. Cloudera Manager lets you add a YARN service in the same way you would add any other Cloudera Manager-managed service. In Apache Hadoop 2, YARN and MapReduce 2 (MR2) are long-needed upgrades for scheduling, resource management, and execution in Hadoop. At their core, the improvements separate cluster resource management capabilities from MapReduce-specific logic. They enable Hadoop to share resources dynamically between MapReduce and other parallel processing frameworks, such as Cloudera Impala; allow more sensible and finer-grained resource configuration for better cluster utilization; and permit Hadoop to scale to accommodate more and ... Read More

Feed: Hadoop – Cloudera Engineering Blog. Author: Aaron Myers. The release of Apache Hadoop 2, as announced today by the Apache Software Foundation, is an exciting one for the entire Hadoop ecosystem. Cloudera engineers have been working hard for many months with the rest of the vast Hadoop community to ensure that Hadoop 2 is the best it can possibly be, for the users of Cloudera’s platform as well as all Hadoop users generally. Hadoop 2 contains many major advances, including (but not limited to): High availability for the HDFS NameNode, which eliminates the previous SPOF in HDFS. Support for ... Read More

Feed: Planet MySQL; Author: MySQL High Availability; In MySQL 8.0.2, users will see the additional columns in the existing Group Replication Performance Schema tables which will provide extended information about Group Replication. Now user can view role and MySQL version of each member of the group, which earlier required a complex set of query. The user can also see additional statistics of each member of the group, like remote applier queue count, remote transactions applied, number of transactions proposed by member and number of proposed transactions rolled back by the group. These have been a constant request from the users of the Group Replication plugin ... Read More

Feed: Hadoop – Cloudera Engineering Blog. Author: Justin Kestelyn. I’ve always held a strong bias that education is most effective when the student learns by doing. As a developer of technical curricula, my goal is to have training participants engage with real and relevant problems as much as possible through hands-on exercises. The high rate at which Apache Hadoop is changing, both as a technology and as an ecosystem, makes developing Cloudera training courses not only demanding but also seriously fun and rewarding. I recently undertook the challenge of upgrading the Cloudera Administrator Training for Apache Hadoop. I more than ... Read More

Feed: Hadoop – Cloudera Engineering Blog. Author: Justin Kestelyn. In December 2012, we described how an internal application built on CDH called Cloudera Support Interface (CSI), which drastically improves Cloudera’s ability to optimally support our customers, is a unique and instructive use case for Apache Hadoop. In this post, we’ll follow up by describing two new differentiating CSI capabilities that have made Cloudera Support yet more responsive for customers: How Cloudera Impala has turbo-charged CSI with support for real-time log file analysis and visualization How Cloudera Search enables interactive data exploration of multiple sources simultaneously from within CSI So, let’s ... Read More

Feed: What's New. Amazon EFS provides simple, scalable file storage for use with Amazon EC2 instances in the AWS Cloud. Amazon EFS is easy to use and offers a simple interface that allows you to create and configure file systems quickly and easily. With Amazon EFS, storage capacity is elastic, growing and shrinking automatically as you add and remove files, so your applications have the storage they need, when they need it.  Amazon EFS is designed for high availability and durability, and provides performance for a broad spectrum of workloads and applications, including Big Data and analytics, media processing workflows, ... Read More

Feed: Clustrix Blog. Author: Dave Anselmi. When people come up and ask, “Oh, so ClustrixDB is yet another MySQL-compatible database. What makes you different?” we have a terrific answer, and it’s all about horizontal scaling: ClustrixDB is the only MySQL compatible database that linearly scales-out both write and read queries. By horizontal scaling we mean each additional node added to a ClustrixDB cluster adds both linear write and read horizontal scale. This is significantly different from what MySQL can provide — as a single-node master architecture, MySQL can have multiple read slaves added, potentially providing at best only linear read ... Read More

Feed: AWS Big Data Blog. Many customers have taken advantage of the numerous benefits of running Apache HBase on Amazon S3 for data storage, including lower costs, data durability, and easier scalability. Customers such as FINRA have lowered their costs by 60% by moving to an HBase on S3 architecture along with the numerous operational benefits that come with decoupling storage from compute and using S3 as the storage layer. HBase on S3 allows you to turn on a cluster and immediately start querying against data within S3 rather than having to go through a lengthy snapshot restore process.With the ... Read More

Feed: Planet MySQL. Author: MySQL High Availability. Group Replication has been around for some time now and the feedback from community is overwhelming. One of the suggestions (BUG#84795) received is related to deploying a mechanism to prevent a server from being updated after stopping group replication. Without this mechanism the server can continue to receive update transactions, which can then committed locally only, very likely not meeting the expectations of the user. To improve safeness we changed the behavior, in MySQL 8.0.2. When executing STOP GROUP_REPLICATION it enables super read only mode on the server. This will cause the server ... Read More

Feed: SQL Server Blog. Author: SQL Server Team. We are pleased to announce availability of the first public release candidate for SQL Server 2017, Release Candidate 1 (RC1), which is now available for download. This means that development work for the new version of SQL Server is complete along most dimensions needed to bring the industry-leading performance and security of SQL Server to Windows, Linux, and Docker containers. In our seven community technology previews (CTPs) to date, SQL Server 2017 has delivered: Linux support for tier-1, mission-critical workloads – SQL Server 2017 support for Linux includes the same high availability ... Read More