Svein Skogen wrote:
And again ...
Is there any work on an upgrade of zfs send/receive to handle resuming on next
media?
I was thinking something along the lines of zfs send (when device goes full)
returning
"send suspended. To resume insert new media and issue zfs resume <IDNUMBER>"
and receive handling:
"zfs receive stream ended before end of file system. Insert next media and issue zfs
resume <IDNUMBER>"
Both of these would give us the ability to do graceful backups (at near
wirespeed of modern SAS autoloaders) and restores with few additional tools.
With a little tweak, I suspect zstreamdump could handle verifies as well...
//Svein
What you are after is 'zfs send|receive' to act just like
ufsdump|ufsrestore. Frankly, I don't think that's going to happen
anytime soon. dump|receive are badly out-of-date (not just on Solaris,
but on any OS). They suck as any sort of larger scale backup system, as
they are missing any sort of indexing and browsing tools, no tape
identification and cataloging, and are really only useful for fast
restore of very limited, well-defined data sets (at this point, OS
reinstalls, really).
I can certainly see having 'zfs send|receive' being able to split their
stream into chunks somehow - this would make integration with things
like Amanda much simpler. But let's face it: it's /highly/ unlikely
that you would have just 'zfs send|receive' without also being able to
get at your add-on backup software, all of which is simple to install
(and, even if you are using many commercial packages, they're even able
to be run for a short time without license keys).
The scenario of "my server burned to the ground, and all I've got is the
OS CD and a single backup tape" is pretty much dust with the ancients
nowdays - if you find yourself in such a scenario, you've either done
some really poor planning, or civilization has collapsed.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
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