Re: netapp-alike snapshots?

[Ulli Horlacher <framstag@rus.uni-stuttgart.de>]

On Tue 2017-08-22 (19:19), A L wrote:
> 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 <framstag@rus.uni-stuttgart.de> -- Sent: 2017-08-22 - 18:57 ----
> 
> > On Tue 2017-08-22 (21:45), Roman Mamedov wrote:
> > 
> >> 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.

Not only du works recursivly, but also find and with option also ls, grep,
etc.

And it would require a bind mount for EVERY directory. There can be
hundreds... thousends!


-- 
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/
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