Re: netapp-alike snapshots?

[A L <crimsoncottage@gmail.com>]

Perhaps netapp is using a VFS overlay. There is really only one snapshot but it is shown in the overlay on every folder. Kind of the same with samba Shadow Copies.

---- From: Ulli Horlacher <framstag@rus.uni-stuttgart.de> -- Sent: 2017-09-09 - 21:52 ----

> On Sat 2017-09-09 (22:43), Andrei Borzenkov wrote:
> 
>> > Your tool does not create .snapshot subdirectories in EVERY directory like
>> 
>> Neither does NetApp. Those "directories" are magic handles that do not
>> really exist.
> 
> I know.
> But symbolic links are the next close thing (I am not a kernel programmer).
> 
> 
>> Apart from obvious problem with recursive directory traversal (NetApp
>> .snapshot are not visible with normal directory list)
> 
> Yes, they are, at least sometimes, eg tar includes the snapshots.
> 
> 
> -- 
> Ullrich Horlacher              Server und Virtualisierung
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