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From: Harsh J <qwertymaniac@gmail.com>
Date: Sat, 29 Jan 2011 11:23:17 +0530
Message-ID: <AANLkTikR99rCCuM7cJRNJhQkzBNMrb3VPQ+U3keZBZJ+@mail.gmail.com>
Subject: Re: Latency and speed of HDFS
To: hdfs-user@hadoop.apache.org, peihe0@gmail.com, zhengda1936@gmail.com
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Moving discussion to hdfs-user mailing list: hdfs-user@hadoop.apache.com

On Sat, Jan 29, 2011 at 5:06 AM, Pei HE <peihe0@gmail.com> wrote:
> Hi all,
> I want to know the detailed performance of Hadoop.
>
> I am writing a client code to test the latency, transfer speed of
> HDFS, and the time of initiating a JVM for a task.
>
> Does anyone know that which classes can be called without running a
> whole map/reduce job to find out the performance of Hadoop?
>
> I am trying to create a DFSClient in the following way.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Configuration conf =3D new Configuration()=
;
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0DFSClient client =3D new DFSClient(conf);
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0client.exists("hdfs://localhost:9900/home/=
");
> But, a RemoteException was thrown.

Would help to know what the cause for the throw of a RemoteException was.

--=20
Harsh J
www.harshj.com