[CentOS] centos 6.2 xfs + nfs space allocation
Svavar Örn Eysteinsson
svavar at fiton.is
Mon Jun 11 11:23:24 UTC 2012
What kernel are you using ?
Are you using inode64 mount option on the Cents server itself for XFS ?
What OS was the NFS client running ? 32bit ?
Just asking, as there seems to be problem with xfs on kernel 2.6.27 when
using inode64 mount options regarding
32bit nfs....
Stephan van Hienen wrote:
> Centos 6.2 system with xfs filesystem.
> I'm sharing this filesystem using nfs.
>
> When I create a 10 gigabyte test file from a nfs client system :
>
> dd if=/dev/zero of=10Gtest bs=1M count=10000
> 10000+0 records in
> 10000+0 records out
> 10485760000 bytes (10 GB) copied, 74.827 s, 140 MB/s
>
> Output from 'ls -al ; du' during this test :
>
> -rw-r--r-- 1 root root 429170688 Jun 8 10:13 10Gtest
> 654456 10Gtest
>
> -rw-r--r-- 1 root root 1756831744 Jun 8 10:13 10Gtest
> 2230720 10Gtest
>
> -rw-r--r-- 1 root root 2492145664 Jun 8 10:11 10Gtest
> 4348288 10Gtest
>
> -rw-r--r-- 1 root root 4686782464 Jun 8 10:11 10Gtest
> 8542592 10Gtest
>
> -rw-r--r-- 1 root root 10485760000 Jun 8 10:12 10Gtest
> 16943552 10Gtest
>
> The file is using almost double the size ?
> Even after a few days the file is showing the same disk usage.
> Only umounting and remounting the filesystem fixes the problem.
> When I do the same test on an ext4 filesystem no issues. (same
> server/client)
>
> Same issue on 2 centos 6.2 servers.
> I also tried to reproduce the issue on an rhel 5.8 system with xfs, but
> here the disk usage is ok.
> (I don't have a rhel6 systems with the xfs addon subscription)
>
> Stephan
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