Michael Smith created IMPALA-11883:
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Summary: erasure-coded-bytes-read metric doesn't work for Ozone
Key: IMPALA-11883
URL: https://issues.apache.org/jira/browse/IMPALA-11883
Project: IMPALA
Issue Type: Bug
Components: Backend
Affects Versions: Impala 4.3.0
Reporter: Michael Smith
The {{erasure-coded-bytes-read}} metric only works for HDFS because it relies
on the HDFS-specific function {{hdfsFileGetReadStatistics}}. We have other ways
to track bytes read: by looking at the actual read operations.
{{hdfsFileGetReadStatistics}} is only needed for tracking things we don't have
visibility into such as locality and short-circuit reads.
Update {{erasure-coded-bytes-read}} to gather metrics from actual reads similar
to what we do for {{bytes-read}}. Note that the semantics are different:
{{bytes-read}} includes reads from memory, local buffer, and cached files; we
should omit those as they're not erasure-coded reads.
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