Perhaps using a bind mount? It would look and work the same as a ordinary fs. Just need to make sure du uses one filesystem.

---- From: Ulli Horlacher [off-list ref] -- Sent: 2017-08-22 - 18:57 ----

On Tue 2017-08-22 (21:45), Roman Mamedov wrote:

quoted

It is beneficial to not have snapshots in-place. With a local directory of
snapshots, issuing things like "find", "grep -r" or even "du" will take an
inordinate amount of time and will produce a result you do not expect.

Netapp snapshots are invisible for tools doing opendir()/readdir()
One could simulate this with symlinks for the snapshot directory:
store the snapshot elsewhere (not inplace) and create a symlink to it, in
every directory.

quoted

Personally I prefer to have a /snapshots directory on every FS

My users want the snapshots locally in a .snapshot subdirectory.
Because Netapp do it this way - for at least 20 years and we have a
multi-PB Netapp storage environment.
No chance to change this.

-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK         
Universitaet Stuttgart         E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
REF:<20170822214531.44538589@natsu>
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