Additionally, an event notification (REDSHIFT-EVENT-3534) lets you know that elastic resize has finished and the cluster is available for reads and writes. To access your VPC in Amazon Redshift, perform the following steps: 1. If Amazon Redshift detects a drive failure, it automatically begins using the other in-cluster copy of the data on that drive to serve queries while also creating another copy of the data on healthy drives within the cluster. When a query fails, you see an Events description such as the following: "A hardware issue was detected on Amazon Redshift cluster [cluster name]. However, all the nodes in a cluster must be in the … Most interestingly, they were able to … The cluster will be unavailable during that time. A node on Amazon Redshift cluster 'xxx' was automatically replaced at 2013-12-18 11:42 UTC. If there is a hardware failure, Amazon Redshift might be unavailable for a short period, which can result in failed queries. The driver and dsn created for the connection can be found in the ODBC Admin window when accessed directly from Windows. Data is exactly the same as in the moment of a failure. Stability: AWS Redshift architecture is implemented in a way that if 1 node crashes, the entire cluster will be unavailable. The cluster is now operating normally. Create a VPC in the same Region that you want to launch an Amazon Redshift cluster.. 2. Note: To improve fault tolerance, it's a best practice to create a cluster subnet group with two or more subnets from different Availability Zones. How do you set up a connection to Amazon Redshift? cluster will be unavailable for queries and updates until a replacement node is provisioned and added to the cluster; In case of Redshift cluster AZ goes down, Redshift cluster is unavailable until power and network access to the AZ are restored; cluster’s data is preserved and can be used once AZ becomes available For more information, see Amazon Redshift cluster subnet groups . Best practice would be shifting to dc1.8xlarge … Create a cluster subnet group.. Authorize access for inbound connections in a VPC security group that you associate with the cluster. You can create a cluster subnet group using either the Amazon Redshift console or programmatically. No driver is listed when trying to set up the DSN through Toad's connection window. "Multi-Node Cluster” is defined as a cluster operating on a publicly available release version of Redshift that has two or more compute nodes and that is on the current or trailing maintenance track, as described in the Amazon Redshift User Guide. AWS Documentation Amazon Redshift Cluster Management Guide Connecting to an Amazon Redshift cluster using SQL client tools You can connect to Amazon Redshift clusters from SQL client tools over Java Database Connectivity (JDBC) and Open Database Connectivity (ODBC) connections. There are three ways to resize an Amazon Redshift cluster: Elastic resize: To quickly add or remove nodes from an existing cluster, use elastic resize.Elastic resize operations usually take a few minutes to complete. For the whole time cluster was unavailable - no queries were run, no imports were possible. If all of the copies within the cluster are unavailable, it will bring the data down from S3. 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