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From "Yuanbo Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11150) [SPS]: Provide persistence when satisfying storage policy.
Date Wed, 21 Dec 2016 03:45:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15766014#comment-15766014
] 

Yuanbo Liu commented on HDFS-11150:
-----------------------------------

[~umamaheswararao]
{quote}
So, for persistence part, how about keeping Xattrs only of that directory..
{quote}
I've tried that before. There is an issue here if we only mark the directory. When recovering
from FsImage, the InodeMap isn't built up, so we don't know the sub-inode of a given inode,
in the end, We cannot add these inodes to movement queue in {{FSDirectory#addToInodeMap}},
any thoughts?

> [SPS]: Provide persistence when satisfying storage policy.
> ----------------------------------------------------------
>
>                 Key: HDFS-11150
>                 URL: https://issues.apache.org/jira/browse/HDFS-11150
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>            Reporter: Yuanbo Liu
>            Assignee: Yuanbo Liu
>         Attachments: HDFS-11150-HDFS-10285.001.patch, HDFS-11150-HDFS-10285.002.patch,
editsStored, editsStored.xml
>
>
> Provide persistence for SPS in case that Hadoop cluster crashes by accident. Basically
we need to change EditLog and FsImage here.



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