On 4/18/07, Nicolas Williams <[EMAIL PROTECTED]> wrote:
On Wed, Apr 18, 2007 at 03:47:55PM -0400, Dennis Clarke wrote:
> Maybe with a definition of what a "backup" is and then some way to
> achieve it. As far as I know the only real backup is one that can be
> tossed into a vault and locked away for seven years. Or any arbitrary
> amount of time within in reason. Like a decade or a century. But
> perhaps a backup today will have as much meaning as papertape over
> time.
>
> Can we discuss this with a few objectives ? Like define "backup" and
> then describe mechanisms that may achieve one? Or a really big
> question that I guess I have to ask, do we even care anymore?
As far as ZFS is concerned any discussion of how you'll read today's
media a decade into the future is completely OT :)
probably. Media should have a shelf life of seven years minimum and
probably a whole lot longer. The technology ( QIC, 4mm DAT, DLT etc
etc ) should be available and around for a long long time.
"zfs send" as backup is probably not generally acceptable: you can't
expect to extract a single file out of it (at least not out of an
incremental zfs send), but that's certainly done routinely with ufsdump,
tar, cpio, ...
Also, why not just punt to NDMP?
.. lets look at it.
http://www.ndmp.org/products/
thats a fair list of companies there. The SDK looks to be alpha stage
or maybe beta :
Q: What good is the NDMP SDK?
The NDMP software developers kit is developed to prototype new NDMP
functionality added and provides a functional (although fairly basic)
implementation of an NDMP client and NDMP server.
The objective of the SDK is to facilitate rapid development of NDMP
compliant clients and servers on a variety of platforms.
Third parties are welcome to download and make use of the provided
source code within your products (subject to copyright notices
supplied) or as example/reference code.
OKay .. thats a good candidate to look at.
dc
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