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Date: Thu, 9 Aug 2007 11:45:42 -0700 (PDT)
From: "stack (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Created: (HADOOP-1700) Append to files in HDFS
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Append to files in HDFS
-----------------------

                 Key: HADOOP-1700
                 URL: https://issues.apache.org/jira/browse/HADOOP-1700
             Project: Hadoop
          Issue Type: New Feature
          Components: dfs
            Reporter: stack


Request for being able to append to files in HDFS has been raised a couple =
of times on the list of late.   For one example, see http://www.nabble.com/=
HDFS%2C-appending-writes-status-tf3848237.html#a10916193.  Other mail descr=
ibes folks' workarounds because this feature is lacking: e.g. http://www.na=
bble.com/Loading-data-into-HDFS-tf4200003.html#a12039480 (Later on this thr=
ead, Jim Kellerman re-raises the HBase need of this feature).  HADOOP-337 '=
DFS files should be appendable' makes mention of file append but it was ope=
ned early in the life of HDFS when the focus was more on implementing the b=
asics rather than adding new features.  Interest fizzled.  Because HADOOP-3=
37 is also a bit of a grab-bag -- it includes truncation and being able to =
concurrently read/write -- rather than try and breathe new life into HADOOP=
-337, instead, here is a new issue focused on file append.  Ultimately, bei=
ng able to do as the google GFS paper describes -- having multiple concurre=
nt clients making 'Atomic Record Append' to a single file would be sweet bu=
t at least for a first cut at this feature, IMO, a single client appending =
to a single HDFS file letting the application manage the access would be su=
fficent.


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