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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7839) Erasure coding: move EC policies from file header to XAttr
Date Thu, 26 Feb 2015 07:14:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Zhe Zhang updated HDFS-7839:
    Attachment: HDFS-7839-000.patch

Initial patch to demonstrate the logic. A couple of questions I think we need more brainstorming:
# Should we allow an EC zone to be created under an existing EC zone? For example, if /dir1
has an EC zone configured, should we allow /dir1/dir2 to be configured as an EC zone with
a different schema?
# Should we allow EC files to exist without a zone? For example, an originally replicated
file converted to EC
# Do we need a similar structure as {{EncryptionZoneManager}} allowing more advanced operations
like listing all EC zones (will an admin ever want to see that)? I think we eventually need
such a manager, at least to manage the list of supported schemas. [~andrew.wang] Could you
share some advice here?

> Erasure coding: move EC policies from file header to XAttr
> ----------------------------------------------------------
>                 Key: HDFS-7839
>                 URL: https://issues.apache.org/jira/browse/HDFS-7839
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>         Attachments: HDFS-7839-000.patch

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