[lustre-discuss] FIEMAP support for Lustre

[Drokin, Oleg]

Hello!

On Aug 24, 2015, at 11:57 AM, Wenji Wu wrote:

> Hello, everybody,
> 
> I understand that ext2/3/4 support FIEMAP to get file extent mapping. 
> 
> Does Lustre supports similar feature like FIEMAP? Can Lustre client gets FIEMAP-like information on a Luster file system?

Yes, Lustre does support fiemap.
You can see patched ext4progs and the filefrag included there works on top of Lustre too, as an example.

lustre/tests/checkfiemap.c in the lustre source tree is another example user of this functionality that you can consult.

Bye,
    Oleg