Synology SA3400 Virtual Machine Manager s White Paper - Page 23

In this design, the first Virtual DSM instance provides administrative services, the second acts as a file server, a third one is used for Calendar and Contacts, and the forth runs Surveillance Station. One Linux VM works as centralized antivirus server to protect clients. The separation of the services through multiple VMs makes the best use of available resources. When events or errors occur, one of the storage nodes can take over administrative services, such as CMS and HyperBackup Vault, for all physical and virtual DSM instances to ensure service continuity. Synology, Taiwan Synology Virtual Machine Manager is used extensively at Synology Headquarters. The native hypervisor is used to virtualize and protect DSM services that are essential to our day-today operations. Multiple Virtual DSM machines are used to boost flexibility of deployment, increase redundancy, and simplify recovery in two elegant setups. Employees across seven company offices and on the move worldwide make intensive use of Synology Chat and other DSM applications for communication and cooperation. In addition to busy network traffic, these applications depend on sizable databases and archives that continue to grow on a daily basis. This presents both expansion and recovery challenges. Office Services Web Services Compute node Compute node Compute node Storage node Storage node VMM Cluster vDSM Other VMs Chat VMM Cluster Web Server Database vCPU vStorage Replication Snapshot Figure 9: In the example on the left, a regular VMM cluster is used to run and back up essential office services at Synology headquarters. On the right, Synology set up a lean VMM cluster configuration in a remote location to run web services, with all devices serving as computing, storage, and backup nodes. A Synology VMM cluster provides the uptime, flexibility, and protection options that dynamic services need. A Virtual DSM machine over 2 TB in size (and growing) hosts Synology Chat Server. It runs alongside other VMs on three powerful FS series all-flash computing nodes. Mass storage is provided by two RS series storage nodes in all-flash configuration, each of which replicates to the other for added redundancy using a dedicated network. In this recommended setup, an even number of storage nodes enables two-way replication 21 Case Studies