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https://issues.apache.org/jira/browse/HDFS-17365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17813029#comment-17813029
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ASF GitHub Bot commented on HDFS-17365:
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hfutatzhanghb opened a new pull request, #6517:
URL: https://github.com/apache/hadoop/pull/6517
### Description of PR
Refer to HDFS-17365.
Currently, when we write ec files. It can tolerate with at most
`numAllBlocks - numDataBlocks` failed streamers.
However, this can lead to block missing exception in some case.
For example, When we use RS-6-3-1024K ec policy, we have written 6 blocks
successfully.
this block is going to be reconstructed, but before that, one of the 6
blocks lost, we may lose the data forerver.
Or if we restart datanode at that time, client will get block missing
exception.
So, we should better add some redundancy here.
> EC: Add extra redunency configuration in checkStreamerFailures to prevent
> data loss.
> ------------------------------------------------------------------------------------
>
> Key: HDFS-17365
> URL: https://issues.apache.org/jira/browse/HDFS-17365
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ec
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Major
>
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