hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7859) Erasure Coding: Persist EC schemas in NameNode
Date Wed, 15 Apr 2015 01:02:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14495493#comment-14495493

Kai Zheng commented on HDFS-7859:

Hi [~zhz],

Thanks for taking care of this and your good suggestion. It looks reasonable to me. This will
sound like a more solid base for the merge. 

To summarize further:
1. This issue HDFS-7859 would provide two system defined schemas in Java codes: one is the
system default schema (rs-6-3), already there; a new one, suggesting rs-10-4; It also ensure
the two schemas will be persisted in the image/editlog for later querying.
2. The left gaps will be processed as follow-on to be done in HDFS-7866, mainly about how
to customize site specific schemas thru a XML file. The design will also be updated.

> Erasure Coding: Persist EC schemas in NameNode
> ----------------------------------------------
>                 Key: HDFS-7859
>                 URL: https://issues.apache.org/jira/browse/HDFS-7859
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Xinwei Qin 
>         Attachments: HDFS-7859.001.patch
> In meetup discussion with [~zhz] and [~jingzhao], it's suggested that we persist EC schemas
in NameNode centrally and reliably, so that EC zones can reference them by name efficiently.

This message was sent by Atlassian JIRA

View raw message