Chenya Zhang created YUNIKORN-830: ------------------------------------- Summary: Node sorting need to support "preferredDuringScheduling" node affinity Key: YUNIKORN-830 URL: https://issues.apache.org/jira/browse/YUNIKORN-830 Project: Apache YuniKorn Issue Type: New Feature Components: core - scheduler Reporter: Chenya Zhang Assignee: Chenya Zhang
YuniKorn scheduler is able to allocate pods based on the node affinity policy "requiredDuringScheduling", but not "preferredDuringScheduling" yet. YuniKorn currently does a full node sorting every time. After [https://github.com/apache/incubator-yunikorn-core/pull/307], we will do sorting incrementally with an ordered B-tree. It can make scheduling different pods to preferred nodes a bit complicated. Discussed with [~cheersyang] [~yuchaoran2011] for a potential solution: * Parse node label’s from the shim and send that to the core over SI (via node attributes). * Parse the pod node-affinity preference in the shim and send that to the core. * Implement something in GetSchedulableNodeIterator().. today we directly retrieve nodes from btree with asce order; we still loop the nodes once, but keep 2 list, one for preferred nodes; when we iterate nodes in the scheduling cycle, we iterate the preferred list first. Adding [~wilfreds] [~kmarton] for more discussion too. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@yunikorn.apache.org For additional commands, e-mail: dev-h...@yunikorn.apache.org