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Re: [zfs-discuss] questions on zfs backups

Subject: Re: [zfs-discuss] questions on zfs backups
From: Carson Gaspar
Date: Sat, 01 Nov 2008 16:06:18 -0700
On 11/1/2008 11:28 AM, David Magda wrote:
> On Oct 31, 2008, at 13:13, Richard Elling wrote:
>> Paul Kraus wrote:
>>> Is there a ufsdump equivalent for ZFS ? For home use I really don't
>>> want to have to buy a NetBackup license.
>> No, and it is unlikely to happen.  To some degree, ufsdump existed
>> because of deficiencies in other copy applications, which have been
>> largely fixed over the past 25+ years.
> How about stabilization of the 'zfs send' stream's format?
> Also I'm surprised Jorg Schilly hasn't chimed yet suggesting star. :)

We need _some_ backup format that will preserve ZFS ACLs. star doesn't 
(yet), nor does any other version of tar that I know of. Sun's cpio 
didn't use to (I haven't tested it recently, anyone know for sure?), and 
if it does now, it's still cpio *shudder*. Even rsync doesn't support 
ZFS ACLs (yet).

It would be _really_ nice if someone familiar with the rather badly 
documented ZFS ACL APIs would contribute code to give us some working 
options. I suspect star and rsync are the least work, as they already 
have ACL frameworks. And if Sun's cpio doesn't have ZFS ACL support yet, 
that really needs to happen.

I actually took a look at doing this for rsync, but I didn't have enough 
time to learn the API by trial-and-error.

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