Dell PowerVault NX3500 Administrator's Guide - Page 24
System Components, NAS Controller Pair
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The NAS Manager provides access to system functionality, using standard internet browsers. You can also perform the management functions included in the NAS Manager from the CLI. System Components The PowerVault NX3500 system consists of: • NAS controller pair • PowerVault storage • Backup power supply • Cache • iSCSI connections • Internal network A • Internal network B • LAN/client network NAS Controller Pair The PowerVault NX3500 clustered NAS solution consists of two NAS controllers configured as a pair. The controllers handle load balancing of client connections, manage read-write operations, perform caching, and interface with servers and workstations. The configuration consists of two controllers in a cluster to ensure that there will be no single point of failure. The PowerVault NX3500 software is installed on each of the controllers. The software is a complete package, consisting of an operating system, volume management, distributed file system, and clustering technology. A virtual IP consolidates all the system's network interface cards (NICs). The PowerVault NX3500 is equipped with a built-in traffic load balancing mechanism that redirects client requests to the least loaded controller, maintaining an even balance between both controllers in the system. Read-write operations are handled through mirrored non-volatile RAM (NVRAM). Cache data is mirrored between the paired NAS controllers, which ensures a quick response to clients' requests, while maintaining complete data integrity. Data from the cache to permanent storage is transferred asynchronously, through optimized data-placement schemes. 24 Introduction