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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6059) Should HDFS restrict the names used for files?
Date Tue, 16 Jun 2009 22:28:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720390#action_12720390

Robert Chansler commented on HADOOP-6059:

Of course, the more restricted the name space, the easier the QA function. And you never have
to explain how globbing works with Farsi. The HDFS milieu is complicated by the deliberate
conflation of file names and URIs. Maybe there are three broad options:

1. Any string can be  a name, except no '/', NUL, or "", "." or "..".
2. Any 8-bit character string can be a name, except no '/', NUL, or "", "." or "..". (loosely,
like POSIX)
3. Any non-empty string from a specified list of printing characters. ([A-Z,a-z,0-9,_,-,:],
for example)

> Should HDFS restrict the names used for files?
> ----------------------------------------------
>                 Key: HADOOP-6059
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6059
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.20.0
>            Reporter: Robert Chansler
> When reviewing the consequences of Hadoop:6017 (the name system could not start because
a file name interpreted as a regex caused a fault), the discussion turned to improving the
test set for file system functions by broadening the set of names used for testing. Presently,
HDFS allows any name without a slash. _Should the space of names be restricted?_ If most funny
names are unintended, maybe the user would benefit from an early error indication. A contrary
view is that restricting names is so 20th-century.
> Should be or shouldn't we?

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