HDFS-7760. Document truncate for WebHDFS. Contributed by Konstantin Shvachko.
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@ -312,6 +312,8 @@ Release 2.7.0 - UNRELEASED
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HDFS-7058. Tests for truncate CLI. (Dasha Boudnik via shv)
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HDFS-7760. Document truncate for WebHDFS. (shv)
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OPTIMIZATIONS
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HDFS-7454. Reduce memory footprint for AclEntries in NameNode.
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@ -137,6 +137,9 @@ WebHDFS REST API
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* {{{Concat File(s)}<<<CONCAT>>>}}
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(see {{{../../api/org/apache/hadoop/fs/FileSystem.html}FileSystem}}.concat)
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* {{{Truncate a File}<<<TRUNCATE>>>}}
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(see {{{../../api/org/apache/hadoop/fs/FileSystem.html}FileSystem}}.truncate)
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* HTTP DELETE
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* {{{Delete a File/Directory}<<<DELETE>>>}}
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@ -492,6 +495,31 @@ Transfer-Encoding: chunked
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{{{../../api/org/apache/hadoop/fs/FileSystem.html}FileSystem}}.delete
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** {Truncate a File}
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* Submit a HTTP POST request.
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+---------------------------------
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curl -i -X POST "http://<HOST>:<PORT>/webhdfs/v1/<PATH>?op=TRUNCATE&newlength=<LONG>"
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+---------------------------------
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The client receives a response with a {{{Boolean JSON Schema}<<<boolean>>> JSON object}}:
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+---------------------------------
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HTTP/1.1 200 OK
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Content-Type: application/json
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Transfer-Encoding: chunked
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{"boolean": true}
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+---------------------------------
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[]
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See also:
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{{{New Length}<<<newlength>>>}},
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{{{../../api/org/apache/hadoop/fs/FileSystem.html}FileSystem}}.truncate
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** {Status of a File/Directory}
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* Submit a HTTP GET request.
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@ -2274,6 +2302,24 @@ var tokenProperties =
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{{{Set Access or Modification Time}<<<SETTIMES>>>}}
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** {New Length}
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*----------------+-------------------------------------------------------------------+
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|| Name | <<<newlength>>> |
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*----------------+-------------------------------------------------------------------+
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|| Description | The size the file is to be truncated to. |
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*----------------+-------------------------------------------------------------------+
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|| Type | long |
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*----------------+-------------------------------------------------------------------+
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|| Valid Values | \>= 0 |
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*----------------+-------------------------------------------------------------------+
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|| Syntax | Any long. |
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*----------------+-------------------------------------------------------------------+
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See also:
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{{{Truncate a File}<<<TRUNCATE>>>}}
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** {Offset}
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*----------------+-------------------------------------------------------------------+
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