Steve Loughran created SLIDER-799:
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Summary: AM to decide when to relax placement policy from specific
host to rack/cluster
Key: SLIDER-799
URL: https://issues.apache.org/jira/browse/SLIDER-799
Project: Slider
Issue Type: Sub-task
Components: appmaster
Affects Versions: Slider 0.70
Reporter: Steve Loughran
Fix For: Slider 0.80
If Slider asks for relaxed affinity, YARN only gives it ~1 second for free
capacity to appear on a node before it falls back to non-local assignment.
While this is OK for analytics throughput, it's suboptimal for placement of
code such as HBase region servers.
AM needs to take charge of the placement and decide for itself when to convert
from placed to relaxed.
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