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Hyukjin Kwon commented on SPARK-31555: -------------------------------------- [~holden] and [~dongjoon], I switched it to 3.2.0 but feel free to edit if I got wrong. > Improve cache block migration > ----------------------------- > > Key: SPARK-31555 > URL: https://issues.apache.org/jira/browse/SPARK-31555 > Project: Spark > Issue Type: Sub-task > Components: Spark Core > Affects Versions: 3.1.0 > Reporter: Holden Karau > Priority: Major > > We should explore the following improvements to cache block migration: > 1) Peer selection (right now may overbalance on certain peers) > 2) Do we need to configure the number of blocks to be migrated at the same > time > 3) Are there any blocks we don't need to replicate (e.g. they are already > stored on the desired number of executors even once we remove the executors > slated for decommissioning). > 4) Do we want to prioritize migrating blocks with no replicas > 5) Log the attempt number for debugging > 6) Clarify the logic for determining the number of replicas > 7) Consider using TestUtils.waitUntilExecutorsUp in tests rather than count > to wait for the executors to come up. imho this is the least important. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org