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From Biswajit Nayak <>
Subject Re: HDFS file system size issue
Date Mon, 14 Apr 2014 03:01:01 GMT
Hi Saumitra,

Could you please check the non-dfs usage. They also contribute to filling
up the disk space.

-----oThe important thing is not to stop questioning o-----

On Mon, Apr 14, 2014 at 1:24 AM, Saumitra <>wrote:

> Hello,
> We are running HDFS on 9-node hadoop cluster, hadoop version is 1.2.1. We
> are using default HDFS block size.
> We have noticed that disks of slaves are almost full. From name node's
> status page (namenode:50070), we could see that disks of live nodes are 90%
> full and DFS Used% in cluster summary page  is ~1TB.
> However hadoop dfs -dus / shows that file system size is merely 38GB.
> 38GB number looks to be correct because we keep only few Hive tables and
> hadoop's /tmp (distributed cache and job outputs) in HDFS. All other data
> is cleaned up. I cross-checked this from hadoop dfs -ls. Also I think
> that there is no internal fragmentation because the files in our Hive
> tables are well-chopped in ~50MB chunks. Here are last few lines of hadoop fsck
> / -files -blocks
> Status: HEALTHY
>  Total size: 38086441332 B
>  Total dirs: 232
>  Total files: 802
>  Total blocks (validated): 796 (avg. block size 47847288 B)
>  Minimally replicated blocks: 796 (100.0 %)
>  Over-replicated blocks: 0 (0.0 %)
>  Under-replicated blocks: 6 (0.75376886 %)
>  Mis-replicated blocks: 0 (0.0 %)
>  Default replication factor: 2
>  Average block replication: 3.0439699
>  Corrupt blocks: 0
>  Missing replicas: 6 (0.24762692 %)
>  Number of data-nodes: 9
>  Number of racks: 1
> FSCK ended at Sun Apr 13 19:49:23 UTC 2014 in 135 milliseconds
> My question is that why disks of slaves are getting full even though there
> are only few files in DFS?

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