Having things fall off the end or get trimmed out of the middle only matters to recovering the form then. You might have seen caveats in forum posts that thinning means that a short-lived file or version in no other version will no longer be available as a file version if the whole-backup version it’s in got deleted. File presence (or not) gets similarly versioned. Anything that continues continues, otherwise the idea of versioned backups wouldn’t make much sense. Deleting first version means you lose things (perhaps a file version) only available in that version. A file might be the same, or might change.īoth totally and partially the same files use deduplication, so that only new blocks need be uploaded.īlocks are not deleted until they are used by no versions. That’s a lot, so before heading into small corrections, let me hit what I think is the major worry.Ī backup version is the files as they were seen at backup. So now I will have to figure out what I actually need. When it comes to backup sets, the individual files usually are more important than the state of the whole set, but not always. So which is more important, the history of the whole configuration or the history of its individual files? In VCS, the configuration always is more important. In Git, the version of a configuration is the primary object, and if one needs at all to see the version history of a file (as a tree or some such presentation), it can be derived from the history of the configuration that contains the file, but the derivation process is not always unambiguous. This is where Linus Torvalds turned the tables quite completely. This derivation order has been traditionally motivated by performance aspects, but is often incomplete or otherwise flaky. The difference between Git and all its predecessors is that the traditional VCS tools hold file versions as the primary objects and derive the history of a configuration from file versions. I am just explaining where I am coming from I have a long history with coding and VCS systems. I possibly miss the reference given, but if you consider a configuration to be conceptually like a backup versionīackup system is not a VCS, and I am not trying to equate them in any way.
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