Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-user@hadoop.apache.org
Received-SPF: pass (nike.apache.org: domain of robstewart57@googlemail.com
 designates 209.85.210.194 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=googlemail.com; s=gamma;
        h=mime-version:from:date:message-id:subject:to:content-type;
        b=NY43R3dqLXRRWmQ6Z0g8vv6Fz+5P7GoraPcgVD6A8Os2IoREFSK63mAzqwcx37oKe1
         DXUmqW7RWrIBNBIyUHAMR5Fbl6bJNubz7JhQHMERCeF5fxHU7ZmindChWVI8U6tGQTkI
         W2pg63ETedy/OSa9GlZrLIv5o1Bo+oqVUGyI4=
MIME-Version: 1.0
From: Rob Stewart <robstewart57@googlemail.com>
Date: Thu, 5 Nov 2009 16:15:36 +0000
Message-ID: <d1e795760911050815qe56cce4q55e8e357c2d9bebd@mail.gmail.com>
Subject: Hadoop Synthetic Load Generator
To: common-user@hadoop.apache.org
Content-Type: multipart/alternative; boundary=0016e65b635ac795020477a20ad7

--0016e65b635ac795020477a20ad7
Content-Type: text/plain; charset=ISO-8859-1

Hi there, I have a question about the synthetic load generator.

I think i'm missing something. So I have successfully tried the
LoadGenerator class to create the a directory for the root dir
"myTestLoadSpace", and subdir's are created, written to, and deleted when
the LoadGenerator is being run.

However, obviously I am in fact wanting to test the performance of the
NameNode on the Hadoop cluster, not my local filesystem (!).

So, how do I create a load space directory using DataGenerator within the
HDFS? And then, how do I run the LoadGenerator and use this HDFS directory
with LoadGenerator.

The following is clearly wrong, but it will give you an idea of what I'm
wanting to perform:

> java LoadGenerator -root HDFS:/user/me/loadSpace


Can you tell me what I'm missing?


thanks.

Rob Stewart

--0016e65b635ac795020477a20ad7--