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https://issues.apache.org/jira/browse/HDFS-11268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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SammiChen updated HDFS-11268:
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Description: Currently, FSImageFormatProtoBuf has the information about
whether the file is striped or not and saved file's erasure coding policy ID in
replication field. But later, when FSImage is loaded to create the name space,
the default system erasure coding policy is used to reconstruct file's block
structure. In case if the erasure coding policy of file is not the default
erasure coding policy, the content of the file cannot be accessed correctly.
(was: Currently, FSImage only has the information about whether the file is
striped or not. It doesn't save the erasure coding policy ID. Later, when the
FSImage is loaded to create the name space, the default system ec policy is
used to as file's ec policy. In case if the ec policy on file is not the
default ec policy, then the content of the file cannot be accessed correctly in
this case. )
> Correctly reconstruct erasure coding file from FSImage
> ------------------------------------------------------
>
> Key: HDFS-11268
> URL: https://issues.apache.org/jira/browse/HDFS-11268
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: erasure-coding
> Affects Versions: 3.0.0-alpha1
> Reporter: SammiChen
> Assignee: SammiChen
> Priority: Critical
> Labels: hdfs-ec-3.0-must-do
>
> Currently, FSImageFormatProtoBuf has the information about whether the file
> is striped or not and saved file's erasure coding policy ID in replication
> field. But later, when FSImage is loaded to create the name space, the
> default system erasure coding policy is used to reconstruct file's block
> structure. In case if the erasure coding policy of file is not the default
> erasure coding policy, the content of the file cannot be accessed correctly.
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