Dell VNX5800 VNX Series: Introduction to SMB 3.0 Support - Page 10

2012 cluster logic ensures the same instance ID is not used by multiple applications at the same time, and only a single instance of an application can be running at any time. Figure 4 Client Continuous Availability Figure 4 describes the basic sequence of events when a node in a Windows cluster fails over: 1. The application opens a file on the CIFS share and sets locks. 2. Node 1 fails and the Windows cluster moves the application from node 1 to node 2. 3. The application re-opens its content on the CIFS share from node 2. Applications accessing the data stored on the CIFS share are not interrupted. Enabling Continuous Availability The Continuous Availability (CA) feature is disabled by default. To enable CA, the file system must first be mounted with the smbca mount option as shown in Figure 5 Enabling CA on the file system. This is a CLI only procedure. EMC VNX Series: Introduction to SMB 3.0 Support 10