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https://issues.apache.org/jira/browse/HDFS-8494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14571956#comment-14571956
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Kai Sasaki commented on HDFS-8494:
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Thank you so much for clarifying critical points.
{quote}
FSImageHandler for Web HDFS, ...
... For the first, we can get the zone info anyway since it's not really called
during startup
{quote}
I cannot fully understand this point. {{FSImageHandler}} is used by Web HDFS,
{{WebImageViewer}}. {{WebImageViewer}} looks keep only fsimage data. This data
is restored through {{FSImageLoader}}. So anyway is it necessary to restore
ECZone info from fsimage file? Is there other way we should restore ECZone info
from NN or something?
> Remove hard-coded chunk size in favor of ECZone
> -----------------------------------------------
>
> Key: HDFS-8494
> URL: https://issues.apache.org/jira/browse/HDFS-8494
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: HDFS-7285
> Reporter: Kai Sasaki
> Assignee: Kai Sasaki
> Fix For: HDFS-7285
>
> Attachments: HDFS-8494-HDFS-7285-01.patch
>
>
> It is necessary to remove hard-coded values inside NameNode configured in
> {{HdfsConstants}}. In this JIRA, we can remove {{chunkSize}} gracefully in
> favor of HDFS-8375.
> Because {{cellSize}} is now originally stored only in {{ErasureCodingZone}},
> {{BlockInfoStriped}} can receive {{cellSize}} in addition to {{ECSchema}}
> when its initialization.
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