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Li Bo commented on HDFS-8136: ----------------------------- HDFS-8190 has given and committed changes to {{TestDFSStripedOutputStream}}, I upload patch 005 to remove duplicate changes. > 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-8136-005.patch, HDFS-8136.1.patch, > HDFS-8136.2.patch, HDFS-8136.3.patch, HDFS-8136.4.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)