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Posted to common-dev@hadoop.apache.org by Weishung Chung <we...@gmail.com> on 2011/02/22 16:59:41 UTC
org.apache.hadoop.hdfs.protocol.Block, which class actually holds the
data bytes in it?
I have a question about the Block class, where is the actual data bytes?
Which class holds the data bytes?
Thank you so much :)
Re: org.apache.hadoop.hdfs.protocol.Block, which class actually holds
the data bytes in it?
Posted by Weishung Chung <we...@gmail.com>.
Thanks alot :)
On Tue, Feb 22, 2011 at 11:32 AM, Harsh J <qw...@gmail.com> wrote:
> Hello,
>
> On Tue, Feb 22, 2011 at 9:30 PM, Weishung Chung <we...@gmail.com>
> wrote:
> > I have a question about the Block class, where is the actual data bytes?
> > Which class holds the data bytes?
> > Thank you so much :)
>
> The Block in itself holds all details needed to retrieve a block
> replica from the DN (it is the most primitive class for a DN's data).
>
> If you want to know which low-level classes are used to 'read' out the
> Block, you're looking for classes BlockReader (Requesting side) and
> BlockSender (Replying side).
>
> --
> Harsh J
> www.harshj.com
>
Re: org.apache.hadoop.hdfs.protocol.Block, which class actually holds
the data bytes in it?
Posted by Harsh J <qw...@gmail.com>.
Hello,
On Tue, Feb 22, 2011 at 9:30 PM, Weishung Chung <we...@gmail.com> wrote:
> I have a question about the Block class, where is the actual data bytes?
> Which class holds the data bytes?
> Thank you so much :)
The Block in itself holds all details needed to retrieve a block
replica from the DN (it is the most primitive class for a DN's data).
If you want to know which low-level classes are used to 'read' out the
Block, you're looking for classes BlockReader (Requesting side) and
BlockSender (Replying side).
--
Harsh J
www.harshj.com
Fwd: org.apache.hadoop.hdfs.protocol.Block, which class actually
holds the data bytes in it?
Posted by Weishung Chung <we...@gmail.com>.
---------- Forwarded message ----------
From: Weishung Chung <we...@gmail.com>
Date: Tue, Feb 22, 2011 at 9:59 AM
Subject: org.apache.hadoop.hdfs.protocol.Block, which class actually holds
the data bytes in it?
To: common-dev@hadoop.apache.org
I have a question about the Block class, where is the actual data bytes?
Which class holds the data bytes?
Thank you so much :)