![]() SmartQuotas enables each Recorder to calculate its available disk space and react appropriately.Ĭonfigure SmartQuotas when more than one Recorder is writing to the Isilon cluster, or when other users share the cluster. It presents a view of available storage that is based on the assigned quota to the Recorder. The SmartQuotas feature enables you to limit the storage that is used for each Avigilon Recorder. Soft limit Lets you define a usage limit, configure notifications, and specify a grace period before subjecting users to strict enforcement. Advisory limit Lets you define a usage limit and configure notifications without subjecting users to strict enforcement. If necessary, both Isilon and the ACC Software Recorder can add or subtract storage, even if a hard limit quota is set. Use the Hard limit quota system to set the video storage as a defined value. For directory quotas, you can configure storage users view of space availability as reported through the operating system. While there are three directory-level quota systems, the Dell Technologies Safety & Security Lab only uses the hard limit system during validation testing: Hard limit (recommended) Lets you define a usage limit for strict enforcement and configure notifications. Volume limitsĪlthough it is possible to assign the full Isilon cluster file system to a single ACC Software Recorder, the Dell Technologies best practice is to use SmartQuotas to segment the single Isilon file system so that each Recorder has a logical subset view of storage. ![]() Priority configuration Even if the impact policy is modified, for example, by changing the settings of all the jobs to Low, the priority of the jobs remains at their default settings. To set the impact policy select Operations > Jobs and Impact Policies. Releases prior to OneFS 7.0 For releases prior to OneFS 7.0, the best I/O performance is obtained by configuring all background jobs with the impact policy set to Low. For less powerful nodes, such as the Isilon X200 and earlier running OneFS 7.0 or greater, modify all jobs to use an impact policy of Low. You can use the default impact policy with Isilon X400, Isilon X410, Isilon NL410, and greater. Releases with OneFS 7.0 or greater Dell Technologies recommends using OneFS 7.0 or later to maximize bandwidth and minimize video review response times. Leave the impact policy as it is, unless Isilon directs you to change one or more policies. The impact policy defines the number of parallel tasks or workers that can run at one time within OneFS. Other sizing tools from video management software (VMS) and camera vendors may also be used for sizing the necessary bandwidth and storage capacity. The Isilon sizing tool provides an accurate calculation. This cluster size ensures that node removal and node failures have minimal or no impact on video ingestion. We recommend a cluster size that enables a node to be removed while retaining a minimum of 10 percent free space in the remaining capacity. Sizing calculations need to include a minimum free space calculation for proper cluster sizing. For more information about Isilon data protection, see Dell EMC PowerScale OneFS: A Technical Overview.Īlthough cluster sizes as small as three nodes are possible, for safety and security applications we recommend a minimum of nodes. Since all data, metadata, and FEC blocks are spread across multiple nodes, dedicated parity drives are not required. Nodes, directories, and other metadata are protected at the same or a higher level as the data blocks they reference. Protection is applied at the file level, enabling the cluster to recover data quickly and efficiently. The Isilon system uses the Reed-Solomon algorithm for N+M protection with Forward Error Correction (FEC). ![]() OneFS does not rely on hardware-based RAID for data protection. Prepare your maintenance schedule accordingly. To maximize caching performance for safety and security workloads, the Dell Technologies Safety & Security Lab recommends using two SSD system drives per node in clusters where it is supported, such as the NL-series.īefore installing Dell EMC Isilon firmware updates for EMC, shut down your ACC service. Software modules that control costs and optimize resources.Flexible data protection and high availability.Storage options that manage files and tiering.Scale-out nodes that add capacity and performance.A symmetrical cluster that runs a distributed file system.The platform's unified software provides centralized web-based and command-line administration to manage the following features: Powered by the distributed Isilon OneFS operating system, an Isilon cluster delivers a scalable pool of storage with a global namespace. The Isilon scale-out network-attached storage (NAS) platform combines modular hardware with unified software to harness unstructured data.
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