[Gluster-users] Centos5.9 Fuse Client fails to write file with 'dd'

[Vijay Bellur]

On 08/30/2013 10:10 PM, The Figuras wrote:
> Hello, Fellow Gluster Users
>
>   I am testing writing file with 'dd' from FUSE client on Centos6 and
> Centos5. Command syntax is i have used is:
>
> /bin/dd if=/dev/zero of=/data/gluster/file bs=20M count=1 oflag=direct
>     When I run it on Centos6 Client, I am receiving results as expected:
>
>   1+0 records in
>   1+0 records out
>   20971520 bytes (21 MB) copied, 0.125189 s, 168 MB/s
>
>    However, when I run the same command on CentOS5.9 I cant create a file.
>
> /bin/dd: opening `/data/gluster/file': Invalid argument

FUSE kernel module in CentOS 5 does lack support for O_DIRECT. By 
dropping the oflag=direct argument with CentOS 5, the write should go 
through.

-Vijay