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From: Harsh J <harsh@cloudera.com>
Date: Thu, 28 Jul 2011 19:40:19 +0530
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 <CAOcnVr0S5=XbR_a0XTNXF+Cqd-GBgBxD1MhEP8BZVG5WhT1W9g@mail.gmail.com>
Subject: Re: How to obtain block information of a HDFS file?
To: hdfs-user@hadoop.apache.org
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Hello,

What version of Hadoop are you using?

On Thu, Jul 28, 2011 at 6:03 PM, Florin P <florinpico@yahoo.com> wrote:
> Hello!
> =A0 I would like to know how to obtain for a file (via Java API) the foll=
owing information
> =A0- how many blocks occupies in the HDFS

Is this request per file? or overall? [If overall, I think metrics are
your best bet]

> =A0 -which are the machines where the blocks were replicated

If this request is per-file, then FileSystem#getBlockLocations(=85) API
can help you. Just request it over the entire size of the file
(FileStatus information can be got via FileSystem#getFileStatus(=85))

--=20
Harsh J