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Posted to common-issues@hadoop.apache.org by "Aaron Kimball (JIRA)" <ji...@apache.org> on 2010/04/16 00:22:58 UTC
[jira] Commented: (HADOOP-6708) New file format for very large
records
[ https://issues.apache.org/jira/browse/HADOOP-6708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12857578#action_12857578 ]
Aaron Kimball commented on HADOOP-6708:
---------------------------------------
In working on Sqoop, I need to import records which may be several gigabytes in size each. I require a file format that allows me to store these records in an efficient, grouped fashion.
Users may then want to open a file containing many such records and partially-read individual records, but still access subsequent records efficiently.
I'm attaching to this issue a proposal for a _LobFile_ format which will store these large objects. (The basis for this work surrounds import of BLOB and CLOB-typed columns.) The specification proposal analyzes available file formats and my understanding of why they aren't appropriate here.
> New file format for very large records
> --------------------------------------
>
> Key: HADOOP-6708
> URL: https://issues.apache.org/jira/browse/HADOOP-6708
> Project: Hadoop Common
> Issue Type: New Feature
> Components: io
> Reporter: Aaron Kimball
> Assignee: Aaron Kimball
>
> A file format that handles multi-gigabyte records efficiently, with lazy disk access
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