Design concepts and disclaimersThere are many design options for a Avigilon Control Center Software implementation including Federations, Auxiliary Servers, and multicast considerations. PowerScale (NAS) The PowerScale scale-out network-attached storage (NAS) platform combines modular hardware with unified software to harness unstructured data. Powered by the distributed PowerScale OneFS operating system, a PowerScale cluster delivers a scalable pool of storage with a global namespace. Dell Technologies Safety & Security Lab recommendations Impact policy and priority configurationThe impact policy defines the number of parallel tasks or workers that can run at one time within OneFS. Leave the impact policy as it is, unless PowerScale directs you to change one or more policies. SmartPools job Virtual hot spare - 8 nodes or less MultiScan and AutoBalance jobs FlexProtect job Dedupe and Compression Configuring SmartConnectSmartConnect uses the existing Domain Name Service (DNS) Server and provides a layer of intelligence within the OneFS software application. Large file system, small view (SmartQuotas)Although it is possible to assign the full PowerScale cluster file system to a single ACC Software Recorder, the Dell best practice is to use SmartQuotas to segment the single PowerScale file system so that each Recorder has a logical subset view of storage. Configuring SmartQuotas (recommended)The SmartQuotas feature enables you to limit the storage that is used for each ACC Software Recorder. It presents a view of available storage that is based on the assigned quota to the Recorder. SmartQuotas enables each Recorder to calculate its available disk space and react appropriately. Configuring authentication and access controlWe conducted authentication and access control tests to determine the best method for shared access. Data protectionOneFS does not rely on hardware-based RAID for data protection. The PowerScale system uses the Reed-Solomon algorithm for N+M protection with Forward Error Correction (FEC). Continuous Availability Continuous Availability (CA) is a feature in OneFS 8.0 that contributes to a transparent failover during a node or NIC failure. Dell recommends using CA enabled shares to minimize video loss during node or NIC failure operations. Job Engines and performance impactDuring testing in the Dell Technologies Safety & Security Lab, we found certain job Engines that can impact the performance of the recorders. SSD strategiesMetadata read/write acceleration writes file data to HDDs and all metadata mirrors to SSDs. This strategy accelerates metadata writes, in addition to reads, but requires about four to five times more SSD storage than metadata read acceleration. Client connections and Load BalancingDuring a node or NIC failure, it is possible that of all the recorders in the failed node might reconnect to any other single available node. This connection issue is specific to CA enabled shares. If this connection issue occurs you can manually re-balance the cluster. Network adapter configuration When using the VMXNET3 driver on ESXi 4.x, 5.x or 6.x, there is significant packet loss during periods of very high traffic bursts.