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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11565) Use compact identifiers for built-in ECPolicies in HdfsFileStatus
Date Wed, 22 Mar 2017 23:45:42 GMT
Andrew Wang created HDFS-11565:
----------------------------------

             Summary: Use compact identifiers for built-in ECPolicies in HdfsFileStatus
                 Key: HDFS-11565
                 URL: https://issues.apache.org/jira/browse/HDFS-11565
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: erasure-coding
    Affects Versions: 3.0.0-alpha2
            Reporter: Andrew Wang
            Assignee: Andrew Wang


Discussed briefly on HDFS-7337 with Kai Zheng. Quoting our convo:

{quote}
>From looking at the protos, one other question I had is about the overhead of these protos
when using the hardcoded policies. There are a bunch of strings and ints, which can be kind
of heavy since they're added to each HdfsFileStatus. Should we make the built-in ones identified
by purely an ID, with these fully specified protos used for the pluggable policies?
{quote}

{quote}
Sounds like this could be considered separately because, either built-in policies or plugged-in
polices, the full meta info is maintained either by the codes or in the fsimage persisted,
so identifying them by purely an ID should works fine. If agree, we could refactor the codes
you mentioned above separately.
{quote}



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