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https://issues.apache.org/jira/browse/HDFS-8852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14681214#comment-14681214
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Hadoop QA commented on HDFS-8852:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 3m 11s | Pre-patch trunk compilation is
healthy. |
| {color:green}+1{color} | @author | 0m 0s | The patch does not contain any
@author tags. |
| {color:green}+1{color} | release audit | 0m 21s | The applied patch does
not increase the total number of release audit warnings. |
| {color:green}+1{color} | site | 2m 56s | Site still builds. |
| {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that
end in whitespace. |
| | | 6m 32s | |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12749753/HDFS-8852.patch |
| Optional Tests | site |
| git revision | trunk / fa1d84a |
| Java | 1.7.0_55 |
| uname | Linux asf900.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/11958/console |
This message was automatically generated.
> HDFS architecture documentation of version 2.x is outdated about append write
> support
> -------------------------------------------------------------------------------------
>
> Key: HDFS-8852
> URL: https://issues.apache.org/jira/browse/HDFS-8852
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: documentation
> Reporter: Hong Dai Thanh
> Assignee: Ajith S
> Labels: newbie
> Attachments: HDFS-8852.patch
>
>
> In the [latest version of the
> documentation|http://hadoop.apache.org/docs/current2/hadoop-project-dist/hadoop-hdfs/HdfsDesign.html#Simple_Coherency_Model],
> and also documentation for all releases with version 2, it’s mentioned that
> “A file once created, written, and closed need not be changed. “ and “There
> is a plan to support appending-writes to files in the future.”
>
> However, as far as I know, HDFS has supported append write since 0.21, based
> on [HDFS-265|https://issues.apache.org/jira/browse/HDFS-265] and [the old
> version of the documentation in
> 2012|https://web.archive.org/web/20121221171824/http://hadoop.apache.org/docs/hdfs/current/hdfs_design.html#Appending-Writes+and+File+Syncs]
> Various posts on the Internet also suggests that append write has been
> available in HDFS, and will always be available in Hadoop version 2 branch.
>
> Can we update the documentation to reflect the current status?
> (Please also review whether the documentation should also be updated for
> version 0.21 and above, and the version 1.x branch)
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