[Pvfs2-developers] How does PVFS2 manage the free space?

[Rob Ross]

Hi,

Currently there is no check for free space performed. It would be 
difficult to actually *know* if there is "enough" space or not, because 
current interfaces don't actually provide a way to say something about 
the size of a file at create time. However, a smarter implementation 
could balance based on space used on various servers. That would have to 
be done at the client side at the moment, because servers aren't 
communicating with one another.

Regards,

Rob

Peng Gu wrote:
> My question is that, when PVFS2 create a new file, does the metadata
> server (MDS) know that there are enough free space on the I/O node for
> this new file? In other words, does the MDS have to check the free
> space on each I/O node on every file creation? Are there any potential
> performance issues here?
> 
> Thanks,
> Peng