Thanks!

> That's EMC's "OneFS" filesystem (EMC bought out Isilon).
> 
> > On Wed, 1 Apr 2015 08:07:34 -0500 Ranjan Maitra 
> > <maitra.mbox.igno...@inbox.com> wrote:
> >
> >> Thanks to both Cameron and you, Bob!
> >>
> >> After the transfer, here is what we have, on that filesystem:
> >>
> >> $ du -sh kmeans --apparent-size
> >> 154G       kmeans
> >>
> >> $ du -sh kmeans
> >> 628G       kmeans
> >>
> >> So, I guess that leaves me (and others) stuck.
> 
> Is "kmeans" on the target or the source filesystem?

Sorry, this is on the target (Isilon FS). Locally (on a F21 workstation and 
ext4 FS) it clocks in at 154G and 159G respectively.

 If it's the source,
> keep in mind that OneFS can do data dedupes (assuming it's enabled),
> but it is a NAS device (NFS and/or SMB). I don't believe it's capable
> of sparse files (few NAS are). The data dedupe would reduce the actual
> storage on disk on the EMC device , but not report it as a sparse
> filesystem


Yes, I have been given this explanation, as well as that th block size is 
turned up on the isilon. This means that the size of a single file is probably 
16K, rather than the typical 4K desktop file size. However, I do not have files 
that are that small where it would make a difference. So, I don't know. 

I see: the dedupe is supposed to run over weekends but I am not sure what it 
does.

Best wishes,
Ranjan

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