Date: Sun, 24 Aug 2014 05:19:50 -0500 From: Scott Bennett <bennett@sdf.org> To: paul@kraus-haus.org Cc: freebsd-questions@freebsd.org Subject: Re: some ZFS questions Message-ID: <201408241019.s7OAJoBw025610@sdf.org> In-Reply-To: <FE57A90F-8783-40E1-A3FF-08867129CFA4@kraus-haus.org> References: <201408070816.s778G9ug015988@sdf.org> <53E3A836.9080904@my.hennepintech.edu> <201408080706.s78765xs022311@sdf.org> <D3447347-512D-4DFF-BC4A-8ECE5B77F3D4@kraus-haus.org> <201408211033.s7LAXWbN006985@sdf.org> <FE57A90F-8783-40E1-A3FF-08867129CFA4@kraus-haus.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Paul Kraus <paul@kraus-haus.org> wrote:
> On Aug 21, 2014, at 6:33, Scott Bennett <bennett@sdf.org> wrote:
> > Paul Kraus <paul@kraus-haus.org> wrote:
>
> >> How much does the geli encryption cost in terms of space and speed? Is there a strong reason to not encrypt ALL the data? It can be in different zfs datasets (the ZFS term for a filesystem). In fact, I am NOT a fan of using the base dataset that is created with every zpool; I always create addition zfs datasets below the root of the zpool.
> >
> > Copying a file from one .eli partition to another can easily run up
> > to 25% on each of two cores of a Q6600.
> > I didn't realize that there would be a "base data set"; I thought that
> > one had to create at least one file system or zvol in a pool in order to
> > use the space at all.
>
> When you create a zpool you get both the zpool and a zfs dataset of the same name. You can use this dataset, but if I am going to be creating *any* other datasets in this zpool I do not. I only use hierarchical datasets in very specific ways as there are rules on inheritance and mount points. For example:
>
Oh. I hadn't gleaned that from the man pages or other documentation.
Thanks for pointing it out.
Scott Bennett, Comm. ASMELG, CFIAG
**********************************************************************
* Internet: bennett at sdf.org *xor* bennett at freeshell.org *
*--------------------------------------------------------------------*
* "A well regulated and disciplined militia, is at all times a good *
* objection to the introduction of that bane of all free governments *
* -- a standing army." *
* -- Gov. John Hancock, New York Journal, 28 January 1790 *
**********************************************************************
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201408241019.s7OAJoBw025610>