yes to all the comments below. Those are all mitigating factors. But I
also agree with Ross and Mike and others that we should be more clear
about when send/recv is appropriate and when it's not the best choice.
We're looking into it.
Lori
On 09/03/09 10:06, Richard Elling wrote:
On Sep 2, 2009, at 11:55 PM, Ross wrote:
I agree, mailing that to all Sun customers is something I think is
likely to turn around and bite you.
Some points to help clarify the situation:
1. There is no other way to archive a dataset than using a snapshot
2. You cannot build a zpool on a tape
3. The stability of the protocol is only a problem if it becomes
impossible
to run some version of OpenSolaris on hardware that is needed to
receive the snapshot. Given the ubiquity of virtualization and
the x86
legacy, I don't think this is a problem for at least the
expected lifetime
of the storage medium.
A lot of people are now going to use that to archive their data, and
some of them are not going to be happy when months or years down the
line they try to restore it and find that the 'zfs receive' just
fails, with no hope of recovering their data.
And they're not going to blame the device that's corrupted a bit,
they're going to come here blaming Sun and ZFS. Archiving to a
format with such a high risk of loosing everything sounds like
incredibly bad advice. Especially when the article actually uses the
term "create archives for long-term storage".
Long term storage doesn't mean "storage that could break with the
next upgrade", or "storage that will fail if even a single bit has
been corrupted anywhere in the process". Sun really need to decide
what they are doing with zfs send/receive because we're getting very
mixed messages now.
Data integrity is a problem for all archiving systems, not just ZFS.
-- richard
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