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Daniel Dai commented on PIG-4434: --------------------------------- RB link: https://reviews.apache.org/r/32492/ > Improve auto-parallelism for tez > -------------------------------- > > Key: PIG-4434 > URL: https://issues.apache.org/jira/browse/PIG-4434 > Project: Pig > Issue Type: Improvement > Components: tez > Reporter: Daniel Dai > Assignee: Daniel Dai > Fix For: 0.15.0 > > Attachments: PIG-4434-1.patch, PIG-4434-2.patch > > > Tez auto-parallelism currently has some limitation: > 1. ShuffledVertexManager only decrease parallelism not increase > 2. Pig currently exaggerate parallelism at frontend, ShuffledVertexManager > might get initial parallelism way large than actual, that would be costly > Instead of that, we can gradually adjust initial vertex parallelism at > runtime once upstream vertexes finishes. -- This message was sent by Atlassian JIRA (v6.3.4#6332)