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Posted to common-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2016/09/27 16:56:22 UTC

[jira] [Created] (HADOOP-13665) Erasure Coding codec should support fallback coder

Wei-Chiu Chuang created HADOOP-13665:
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             Summary: Erasure Coding codec should support fallback coder
                 Key: HADOOP-13665
                 URL: https://issues.apache.org/jira/browse/HADOOP-13665
             Project: Hadoop Common
          Issue Type: Improvement
          Components: io
            Reporter: Wei-Chiu Chuang


I think EC issues should be reported in HDFS, but the code lands in Hadoop Common anyway.

The current EC codec supports a single coder only (by default pure Java implementation). If the native coder is specified but is unavailable, it should fallback to pure Java implementation.

One possible solution is to follow the convention of existing Hadoop native codec, such as transport encryption (see {{CryptoCodec.java}}). It supports fallback by specifying two or multiple coders as the value of property, and loads coders in order.



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