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Date: Sun, 3 Feb 2008 01:32:09 -0800 (PST)
From: "dhruba borthakur (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-1700) Append to files in HDFS
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     [ https://issues.apache.org/jira/browse/HADOOP-1700?page=3Dcom.atlassi=
an.jira.plugin.system.issuetabpanels:all-tabpanel ]

dhruba borthakur updated HADOOP-1700:
-------------------------------------

    Status: Open  (was: Patch Available)

I am canceling this patch because I am not convinced that the current patch=
 does error recovery.=20

> Append to files in HDFS
> -----------------------
>
>                 Key: HADOOP-1700
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1700
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.15.1
>            Reporter: stack
>         Attachments: append.patch, Appends.doc, Appends.doc, Appends.html
>
>
> Request for being able to append to files in HDFS has been raised a coupl=
e of times on the list of late.   For one example, see http://www.nabble.co=
m/HDFS%2C-appending-writes-status-tf3848237.html#a10916193.  Other mail des=
cribes folks' workarounds because this feature is lacking: e.g. http://www.=
nabble.com/Loading-data-into-HDFS-tf4200003.html#a12039480 (Later on this t=
hread, 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 o=
pened early in the life of HDFS when the focus was more on implementing the=
 basics rather than adding new features.  Interest fizzled.  Because HADOOP=
-337 is also a bit of a grab-bag -- it includes truncation and being able t=
o concurrently read/write -- rather than try and breathe new life into HADO=
OP-337, instead, here is a new issue focused on file append.  Ultimately, b=
eing able to do as the google GFS paper describes -- having multiple concur=
rent clients making 'Atomic Record Append' to a single file would be sweet =
but at least for a first cut at this feature, IMO, a single client appendin=
g to a single HDFS file letting the application manage the access would be =
sufficent.

--=20
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