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From "Jerry Chen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9997) Improve TFile API to be able to pass the context for encryption codecs
Date Thu, 26 Sep 2013 08:08:02 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jerry Chen updated HADOOP-9997:

    Attachment: HADOOP-9997.patch

Attacd the patch for reference. It depends on HADOOP-9331.
> Improve TFile API to be able to pass the context for encryption codecs
> ----------------------------------------------------------------------
>                 Key: HADOOP-9997
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9997
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 3.0.0
>            Reporter: Jerry Chen
>              Labels: Rhino
>         Attachments: HADOOP-9997.patch
>   Original Estimate: 72h
>  Remaining Estimate: 72h
> HADOOP-9996 extends TFile to support any compression codecs available in Hadoop, such
as Snappy. This also provides the opportunity to utilize the crypto codec for encryption,
a new feature added by HADOOP-9331. The crypto codec is based on the compression codec and
it is a natural extension of its usage here. While in API level encryption usually needs a
key context while compression usually doesn’t.
> This work needs to extend the TFile Reader and Writer to passing and handling a context
of the codec. For crypto codecs, this may be the key information for using to encrypt or decrypt
the data. To keep the backward compatibility of the reader and writer, new methods or constructor
with codec context can be added instead of modifying the existing methods.

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