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MapReduce >> mail # user >> HDFS compatibility.


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Jane Chen 2012-09-14, 22:51
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Harsh J 2012-09-15, 01:59
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RE: HDFS compatibility.
Thank you, Harsh!

-----Original Message-----
From: Harsh J [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 14, 2012 7:00 PM
To: [EMAIL PROTECTED]
Subject: Re: HDFS compatibility.

Jane,

Yes with a regular upgrade, your data will be available, not lost.

For doing upgrades, see
http://hadoop.apache.org/docs/stable/hdfs_user_guide.html#Upgrade+and+Rollback

I recommend reading the process and text described in the section
"Upgrades" (under Maintenance), page 316 | Chapter 10: "Administering
Hadoop" of Tom White's 2nd Edition of Hadoop: The Definitive Guide.

HTH.

On Sat, Sep 15, 2012 at 4:21 AM, Jane Chen <[EMAIL PROTECTED]> wrote:
>
> If I were to upgrade from 1.0 to 0.23.1 or 2.0, will my data stored on HDFS still be accessible to the 2.0 system?  Is there any documented upgrade process available?
>
> Thanks,
> Jane
--
Harsh J