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From "Andrzej Bialecki (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2113) Add "-text" command to FsShell to decode SequenceFile to stdout
Date Mon, 29 Oct 2007 19:57:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538570
] 

Andrzej Bialecki  commented on HADOOP-2113:
-------------------------------------------

Some additional functionality was requested for HADOOP-175, and so far it didn't materialize
... ;)

UTF8 keys in these utilities are used only when user wants to retrieve specific records by
key - and indeed, we can change this to Text - otherwise the tools use whatever classes are
declared for keys/values, so from this point of view they don't depend on UTF8.

Regarding mapred: I use these utilities often, specifically for casual checking of existing
data files, and they come especially handy in cases when only DFS is working but mapred might
not be available, or when the overhead of starting a mapred job is too high (e.g. dumping
the first record of a big SequenceFile).

> Add "-text" command to FsShell to decode SequenceFile to stdout
> ---------------------------------------------------------------
>
>                 Key: HADOOP-2113
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2113
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: fs
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>            Priority: Minor
>             Fix For: 0.16.0
>
>         Attachments: 2113-0.patch
>
>
> FsShell should provide a command to examine SequenceFiles.

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