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SmartPools transfer limits, introduced in OneFS 9.5, govern storage pool usage beyond which file pool policies will not attempt to move files to a target. The principal benefits of transfer limits include reliability, by preventing undesirable spillover actions, and performance, by avoiding unnecessary work.
The default transfer limit in OneFS 9.5 and later releases is 90%, and it applies to any of a cluster’s storage pools where a limit is not explicitly set. However, this limit only applies when SmartPools is licensed on a cluster and jobs are run that apply file pool policies, namely SmartPools, SmartPoolsTree, and FilePolicy.
Transfer limits can be specified as a percentage per tier, per node pool, or disabled. You can configure transfer limits from the OneFS WebUI by going to File system > Storage pools > SmartPools and selecting the resource you want.
Note: If transfer limits are configured per-tier, all the constituent node pools within that tier will share the same limit value.
In OneFS 9.5 and later releases, the Storage Pools Summary WebUI also displays a histogram which includes the transfer limit thresholds and indicates any limit violations.