niner I don't know, I don't use snapshots, actually, this is first time I did hear about that concept, and after reading for a bout 5-10 minutes about it I failed to see any benefit over traditional data backup (keeping current form, non-compressed or tool-only formats) for Desktop users, it just doesn't make any sense. As for rolling back updates, package manager? If incremental backup means adding/synching periodically in consistent or non-consistent manner, there are trillion ways of doing so, from scheduling background tasks to doing it at shutdown time. I can't answer last question, fsck should take care of that to my knowledge.
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Originally posted by leipero View PostI don't know, I don't use snapshots, actually, this is first time I did hear about that concept, and after reading for a bout 5-10 minutes about it I failed to see any benefit .. it just doesn't make any sense .. package manager? .. I can't answer last question .. to my knowledge
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Originally posted by leipero View Postniner I don't know, I don't use snapshots, actually, this is first time I did hear about that concept, and after reading for a bout 5-10 minutes about it I failed to see any benefit over traditional data backup (keeping current form, non-compressed or tool-only formats) for Desktop users,
Originally posted by leipero View Postfsck should take care of that to my knowledge.
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And where package rollbacks won't help you is in relation to config files. /etc/ is one place I always enable snapshots.
Sub-volumes are another feature I quite like, though I concede it's largely motivated by my use of snapshots. It's a nice alternative to being forced to statically partition.
Now, one big downside of BTRFS is in COW and the penalty you take with large, frequently-modified files. Things like databases and VM images, for instance. So, I tend to use XFS to hold such data.
I know it's a lot to ask, but it's generally a good idea not to trash something you don't know/understand. It's fine to question the value/worth/usefulness of something, though. Questions are a good learning tool.
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caligula Maybe because I do not care for such features? Why wasting time on reading something I (and 99% of the users) couldn't care less.
niner Ok, I see, still that's very unlikely scenario, and running something for the scenarios that are unlikely to happen (in years, it never actually happened to me on two separate machines, not counting others I've installed) it just doesn't make sense for desktop users (where my point was), for business it does, but I wasn't refering to that at all.
My understanding was that fsck checks data/blok integrity of file system, if file gets corrupted due to the bad RAM it is likely it will show in file system blocks on ext4, it's funny because that happened to me one week ago, when moving PC etc., one RAM module didn't have good contact, and I've got corrupted file system (and booting with half of RAM, two modules, sometimes it boots both sometimes just one well seated module...), did run fsck manually, everything got fixed and journalctl stopped reporting errors and system booted fine (after cleaning and re-seating RAM module ofc.).
coder Ok, I didn't trash it tho, I did question value for desktop (maybe in a bad manner...), because I still see none. Now for sure, people tend to clasify games/media and other nonsense as "important data", so they end up with terabytes of backups, personally I clasify that sort of things as irrelevant trash and end up with needs to backup few megabytes at best. For people who take lot's of family photos etc., it's not a good idea to save them in digital form only, and at one place only, so snapshots are questionably useful in those cases also.
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Originally posted by niner View PostOk, then please tell me how I can have lots of snapshots with ext4 without a large slowdown. And how I can get easy rollback of updates without losing my data. And what about fast incremental backup both local and off-site? And how can I be sure with ext4 that my data is correct and not corrupted by a faulty disk or memory?
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Originally posted by waxhead View PostMichael: In your graphs - Is it possible to make some group boxes around tests that should be grouped e.g. btrfs related, xfs related, etc... etc.... I think that would make it a bit easier to follow.Michael Larabel
https://www.michaellarabel.com/
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Originally posted by Michael View Post
Currently there is no way. I would need to do some thinking for how to come up with the logic for doing so since all the graph generation is fully automated.
http://www.dirtcellar.net
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Originally posted by Slithery View PostIt would be great to see some ZFS benchmarks as well, as it's the only other filesystem with a comparable feature set to btrfs.
Performance isn't everything.
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