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authorDistix listener <distix@pieni.net>2016-07-24 12:50:08 +0200
committerDistix listener <distix@pieni.net>2016-07-24 12:50:08 +0200
commit81641224c029d032d06e0adcc55d6ec24612fe45 (patch)
treee4b2bb0d64ad91f791fb1fe40ba27fd8ef5d9494 /tickets
parente029ab6d8555d9373c2171fae5b2c5b214ee4068 (diff)
downloadobnam-dev-distix-81641224c029d032d06e0adcc55d6ec24612fe45.tar.gz
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+Date: Sun, 24 Jul 2016 12:45:48 +0200
+From: Stefano Zacchiroli <zack@upsilon.cc>
+To: Lars Wirzenius <liw@liw.fi>
+Message-ID: <20160724104548.GA32296@upsilon.cc>
+References: <20160226085104.GA11872@upsilon.cc>
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+Cc: obnam-dev@obnam.org
+Subject: Re: injecting old backup generations
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+Hey Lars, thanks for your answer! All looks good to me, but I do have a
+question about a specific point you raised:
+
+On Sun, Jul 24, 2016 at 12:42:46PM +0300, Lars Wirzenius wrote:
+> I don't see a need to do the reverse hook for restoring.
+
+Why?
+
+Aside from the design elegance that round-tripping has in general,
+without the converse mapping people would be unable to just restore a
+system in place. Not that one *usually* does that, but even if you
+restore in a temp dir having the content of that dir being isomorphic to
+the file-system part it comes from is really handy.
+
+Same goes for timestamps, with the added disadvantage that they would be
+even more difficult to fix upon restore.
+
+It is true that with round-tripping you'll go down the rabbit hole of
+whether you offer a mangling API that *guarantees* round-tripping (which
+would be probably awkward) or just expect users to do that themselves
+(and then allow users to shoot themselves in the foot). But round
+tripping still seems to me the obvious right way to go here. What am I
+missing? Maybe some intrinsic difficulty related to how obnam works
+internally?
+
+Cheers.
+--
+Stefano Zacchiroli . . . . . . . zack@upsilon.cc . . . . o . . . o . o
+Maître de conférences . . . . . http://upsilon.cc/zack . . . o . . . o o
+Former Debian Project Leader . . . . . @zacchiro . . . . o o o . . . o .
+« the first rule of tautology club is the first rule of tautology club »
+
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