Yi Liu created HDFS-8900:
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Summary: Improve XAttr memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
{code}
private final ImmutableList<XAttr> xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point of
view, since {{ImmutableList}} and {{XAttr}} have object memory overhead, and
each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
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