[Swift-devel] IO overheads of swift wrapper scripts on BlueGene/P

[Mihael Hategan]

On Mon, 2009-10-19 at 10:25 -0500, Ioan Raicu wrote:
> OK, I see now. The move in theory should be light weight, right? As
> its just metadata that is changing (e.g. moving on the same
> filesystem, not copying), right? Or is the job dir really in the
> compute node RAM, and the move is actually doing a copy from CN RAM to
> GPFS?

In Allan's case, I believe it's scratch -> gpfs.

It's still troubling to see 3 small files taking 3 minutes to be copied.