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List:       zfs-discuss
Subject:    Re: [zfs-discuss] way to find out of a dataset has children
From:       "Geoff Nordli" <geoffn () gnaa ! net>
Date:       2010-09-27 20:23:21
Message-ID: 037801cb5e81$d4824390$7d86cab0$ () gnaa ! net
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>From: Richard Elling  
>Sent: Monday, September 27, 2010 1:01 PM
>
>On Sep 27, 2010, at 11:54 AM, Geoff Nordli wrote:
>>
>> Are there any properties I can set on the clone side?
>
>Each clone records its origin snapshot in the "origin" property.
>
>$ zfs get origin syspool/rootfs-nmu-001
>NAME                    PROPERTY  VALUE                           SOURCE
>syspool/rootfs-nmu-001  origin    syspool/rootfs-nmu-000@nmu-001  -
>
>Enjoy
> -- richard

Hi Richard.

Yes, we can use the origin, but that tells me where it came from, not how
many snapshots are built from it.  

Before I can delete it, the clone can't have any snapshots under it.  

This isn't hard to solve, I can just do a regex on the clone name looking
for snapshots name, but I was hoping there was a simple zfs property I can
query.

Thanks,

Geoff 

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