Devesh Kumar Singh created HDDS-15870:
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Summary: Make WritableECContainerProvider tier-aware with
policy-level fallback and per-tier quota
Key: HDDS-15870
URL: https://issues.apache.org/jira/browse/HDDS-15870
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Devesh Kumar Singh
Assignee: Devesh Kumar Singh
{code:java}
WritableECContainerProvider.getContainer(size, ec, owner, exclude)
{code}
is the entry point for allocating an EC block. Today it is fully tier-blind: no
StorageTier parameter, no filter in the reuse loop, and a single
getMaximumPipelines(ec) quota shared across all tiers. On a heterogeneous
cluster this means every HOT EC allocation can end up on a DISK pipeline even
when SSD DNs are idle, and a busy DISK tier at the global cap can starve a
scarce SSD tier.
Make the provider tier-aware end-to-end. Concretely, getContainer takes a
StorageTier tier argument and internally implements the following behavior:
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