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| From | Ian Collins <ian-news@hotmail.com> |
| Newsgroups | comp.programming |
| Subject | Re: Do integrity checks by file comparison really work? |
| Date | Sat, 19 Jan 2013 17:12:24 +1300 |
| Lines | 22 |
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Robert Wessel wrote: > On Wed, 16 Jan 2013 11:38:54 +0100, Thomas B <thomasb@nospam.it> > wrote: >> >> You wrote: "I've never seen an OS that would share file buffers between >> two files like that", so I suppose this should be the same for files on >> the same volume. > > > Some OS's/filesystems can do a copy with the equivalent of a *nix hard > link, and then do a copy-on-write procedure if the file is ever > modified. In that case you may have only a single copy of the file. > It can't do that to you across volumes. ZFS is a good example. If you snapshot or clone a filesystem, no extra space is used until it (a clone) or the source are modified. ZFS also checksums its data, so there is no need to use another tool to validate copes. -- Ian Collins
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Do integrity checks by file comparison really work? Thomas B <thomasb@nospam.it> - 2013-01-08 13:04 +0100
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-13 05:04 -0600
Re: Do integrity checks by file comparison really work? Mark F <mark53916@gmail.com> - 2013-01-13 09:26 -0500
Re: Do integrity checks by file comparison really work? Mark F <mark53916@gmail.com> - 2013-01-13 09:40 -0500
Re: Do integrity checks by file comparison really work? Thomas B <thomasb@nospam.it> - 2013-01-16 11:38 +0100
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-18 15:07 -0600
Re: Do integrity checks by file comparison really work? Ian Collins <ian-news@hotmail.com> - 2013-01-19 17:12 +1300
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-18 22:37 -0600
Re: Do integrity checks by file comparison really work? Ian Collins <ian-news@hotmail.com> - 2013-01-19 18:36 +1300
Re: Do integrity checks by file comparison really work? Thomas B <thomasb@nospam.it> - 2013-01-19 14:06 +0100
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-21 03:40 -0600
Re: Do integrity checks by file comparison really work? Thomas B <thomasb@nospam.it> - 2013-01-21 17:41 +0100
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-21 15:28 -0600
Re: Do integrity checks by file comparison really work? Willem <willem@turtle.stack.nl> - 2013-01-14 18:23 +0000
Re: Do integrity checks by file comparison really work? Thomas B <thomasb@nospam.it> - 2013-01-16 16:46 +0100
Re: Do integrity checks by file comparison really work? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-18 15:09 -0600
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