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Zhe Zhang commented on HDFS-7678: --------------------------------- Thanks for the feedback Jing. It turns out that the test will fail because because on the codec level we can only decode with all parity blocks present. HADOOP-11566 will address it. To reduce dependency on codec and output stream, I will keep adding tests to {{TestReadStripedFile}} (would be great if you can review HDFS-8334 first) instead of the end-to-end test. > Erasure coding: DFSInputStream with decode functionality (pread) > ---------------------------------------------------------------- > > Key: HDFS-7678 > URL: https://issues.apache.org/jira/browse/HDFS-7678 > Project: Hadoop HDFS > Issue Type: Sub-task > Affects Versions: HDFS-7285 > Reporter: Li Bo > Assignee: Zhe Zhang > Attachments: BlockGroupReader.patch, HDFS-7678-HDFS-7285.002.patch, > HDFS-7678-HDFS-7285.003.patch, HDFS-7678-HDFS-7285.004.patch, > HDFS-7678-HDFS-7285.005.patch, HDFS-7678-HDFS-7285.006.patch, > HDFS-7678-HDFS-7285.007.patch, HDFS-7678-HDFS-7285.008.patch, > HDFS-7678-HDFS-7285.009.patch, HDFS-7678-HDFS-7285.010.patch, > HDFS-7678.000.patch, HDFS-7678.001.patch > > > A block group reader will read data from BlockGroup no matter in striping > layout or contiguous layout. The corrupt blocks can be known before > reading(told by namenode), or just be found during reading. The block group > reader needs to do decoding work when some blocks are found corrupt. -- This message was sent by Atlassian JIRA (v6.3.4#6332)