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Date: Sat, 26 May 2012 10:09:23 +0000 (UTC)
From: "Ashish Singhi (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Updated] (HDFS-3295) Mismatch in number of bytes already
 moved and number of bytes being moved in balancer report
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     [ https://issues.apache.org/jira/browse/HDFS-3295?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashish Singhi updated HDFS-3295:
--------------------------------

    Attachment: HDFS-3295.patch
   =20
> Mismatch in number of bytes already moved and number of bytes being moved=
 in balancer report
> -------------------------------------------------------------------------=
-------------------
>
>                 Key: HDFS-3295
>                 URL: https://issues.apache.org/jira/browse/HDFS-3295
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer
>    Affects Versions: 0.23.0
>            Reporter: J.Andreina
>            Assignee: Ashish Singhi
>             Fix For: 0.24.0
>
>         Attachments: HDFS-3295.patch, HDFS-3295.patch, HDFS-3295.patch, H=
DFS-3295.patch
>
>
> Scenario:
> Replication factor =3D 1,fs.defaultFS=3Dhdfs://namenodeip:port,dfs.nameno=
de.rpc-address=3Dnamenodeip:port.
> step 1: started DN1.Pumped 4.67GB of data
> step 2: started DN2.
> step 3: issued the balancer cmd(./start-balancer.sh -threshold 1)
> Totally  848.41 MB  has been moved to 2DN and took 4 iterations to move t=
he blocks to 2DN.
> But in balancer output in all the iterations the number of bytes already =
moved is alway 0KB  and there is mismatch in the Bytes being moved with the=
 bytes left to move
> Balancer output for 2nd Iteration
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> {noformat}
> Time Stamp               Iteration#  Bytes Already Moved  Bytes Left To M=
ove  Bytes Being Moved
> Apr 18, 2012 12:41:20 PM          0                 0 KB           848.41=
 MB          151.18 MB
> Apr 18, 2012 1:06:46 PM           1                 0 KB           646.02=
 MB          151.18 MB
> Apr 18, 2012 1:10:28 PM           2                 0 KB           417.43=
 MB          151.18 MB
> Apr 18, 2012 1:14:04 PM           3                 0 KB           223.84=
 MB          151.18 MB
> Apr 18, 2012 1:18:10 PM           4                 0 KB            30.34=
 MB          151.18 MB{noformat}
> In the above balancer output
> =E2=80=A2Bytes already moved is 0KB
> =E2=80=A2 In 3 rd iterarion Bytes left to move is 223.84 MB but Bytes bei=
ng moved is 151.18 MB . So in next iteration the bytes left to move should =
be 223.84 MB - 151.18 MB=20

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