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MapReduce, mail # user - block size


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Kartashov, Andy 2012-11-20, 16:31
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Kai Voigt 2012-11-20, 16:33
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RE: block size
Kartashov, Andy 2012-11-20, 16:36
Cheers!

From: Kai Voigt [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 20, 2012 11:34 AM
To: [EMAIL PROTECTED]
Subject: Re: block size

Hi,

Am 20.11.2012 um 17:31 schrieb "Kartashov, Andy" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>:
After changing property of block size from 64 to 128Mb, will I need to re-import data or will running hadoop balancer will resize blocks in hdfs?

the blocksize affects new files only, existing files will not be modified. As you said, you need to re-import those old files if you want to store them with the new blocksize.

Kai

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Kai Voigt
[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
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Shahab Yunus 2014-01-03, 16:45