hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7613) Block placement policy for erasure coding groups
Date Thu, 19 Mar 2015 22:12:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14370225#comment-14370225
] 

Zhe Zhang commented on HDFS-7613:
---------------------------------

This JIRA actually has a wider scope than HDFS-7891. Besides the initial target selection
(e.g., selecting 14 nodes as initial targets for the group), we also need to select recovery
targets. For example, if 1 node in the 14 targets dies, we need to select another node to
recover the data and we should avoid those racks already hosting the group.

> Block placement policy for erasure coding groups
> ------------------------------------------------
>
>                 Key: HDFS-7613
>                 URL: https://issues.apache.org/jira/browse/HDFS-7613
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Zhe Zhang
>            Assignee: Walter Su
>
> Blocks in an erasure coding group should be placed in different failure domains -- different
DataNodes at the minimum, and different racks ideally.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message