Cluster

MySQL Cluster NDB 7.3.8 released

MySQL Cluster NDB 7.3.8 has just been released and its based on MySQL Server 5.6 and including features from version 7.3 of the NDB storage engine, as well as fixing a number of recently discovered bugs in previous MySQL Cluster releases. This release also incorporates all bugfixes and changes made in previous MySQL Cluster releases, as well as all bugfixes and feature changes which were added in mainline MySQL 5.6 through MySQL 5.

Creating a Hive Cluster job using Amazon EMR CLI

Following from my previous post on Installing the Amazon EMR Command Line Interface for Windows, I will look at how to create an Elastic MapReduce job (Hive Cluster) from the CLI. This includes creation of Instances i.e a Master Instance and Slave Instances using an Interactive Hive Session. Step 1: without specifying the number of instances to create – Run the following command from the Amazon EMR CLI directory: –create –alive –hive-interactive –name “Test_Job Flow” –instance-type m1.

Active Route removed on Windows Server Failover Cluster

I came across an issue today while failing over a SQL instance in a clustered 2 node setup. While failing over the resource group, I immediately lost connection to the active node prior to the failover. I was still able to access the now Active node and saw that the heartbeat between the two nodes was online which was an indication that the second node was still joined in the cluster.

Add new disk resource to existing cluster group‏

In this post I will work you through on how to add new disk as a resource and dependency to an existing cluster group. Key requirement will be to ensure that a new disk/LUN had been provisioned and added as new drives to the SQL servers. Also ensure that the disk is formatted with the appropriate Allocation Unit Size. Refer to this Post for more details. Installation Steps – Log in to the active cluster node - Open the Failover Cluster Manager - Navigate down to Storage - Right-click on Storage and click Add a disk – On Add Disks to a Cluster - Ensure the new disk is selected - click OK – The cluster manager will add the new disk and bring it online – When the disk is added, you will notice under Available Storage the newly added disk.