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
(v6.3.4#6332)

Mime
View raw message