hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-5958) One very large node in a cluster prevents balancer from balancing data
Date Thu, 03 Dec 2015 21:51:11 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze resolved HDFS-5958.
---------------------------------------
    Resolution: Duplicate

> One very large node in a cluster prevents balancer from balancing data
> ----------------------------------------------------------------------
>
>                 Key: HDFS-5958
>                 URL: https://issues.apache.org/jira/browse/HDFS-5958
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>    Affects Versions: 2.2.0
>         Environment: Hadoop cluster with 4 nodes: 3 with 500Gb drives and one with 4Tb
drive.
>            Reporter: Alexey Kovyrin
>
> In a cluster with a set of small nodes and one much larger node balancer always selects
the large node as the target even though it already has a copy of each block in the cluster.
> This causes the balancer to enter an infinite loop and stop balancing other nodes because
each balancing iteration selects the same target and then could not find a single block to
move.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message