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Kai Sasaki commented on HDFS-8136: ---------------------------------- There seems to be {{TestDFSStripedOutputStream}} and it passed. But there is not a test class about reader, {{DFSStripedInputStream}}. Is it better to implement now in this JIRA? Or can we test after resolve other dependencies such as DN. > Client gets and uses EC schema when reads and writes a stripping file > --------------------------------------------------------------------- > > Key: HDFS-8136 > URL: https://issues.apache.org/jira/browse/HDFS-8136 > Project: Hadoop HDFS > Issue Type: Sub-task > Affects Versions: HDFS-7285 > Reporter: Kai Zheng > Assignee: Kai Sasaki > Attachments: HDFS-8136.1.patch > > > Discussed with [~umamaheswararao] and [~vinayrpet], in client when reading > and writing a stripping file, it can invoke a separate call to NameNode to > request the EC schema associated with the EC zone where the file is in. Then > the schema can be used to guide the reading and writing. Currently it uses > hard-coded values. > Optionally, as an optimization consideration, client may cache schema info > per file or per zone or per schema name. We could add schema name in > {{HdfsFileStatus}} for that. -- This message was sent by Atlassian JIRA (v6.3.4#6332)