How often do you run backups on your system?
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Every hour. Could do it more frequently if needed.
It depends on how resource intensive the backup process is.
Consider an 800GB Immich instance.
Using Duplicity or rsync takes 1.5 hours per backup. 99% of the time is spent in traversing the directory structure and checking which files have changed. 1% is spent into transferring the difference to the backup. Any backup system that operates on top of the file system would take this much. In addition, unless you're using something that can take snapshots of the filesystem, you have to stop Immich during the backup process in order to prevent backing up an invalid app state.
Using ZFS send on the other hand (with syncoid) takes less than 5 seconds to discover the differences and the rest of the time is spent on the data transfer, at 100MB/s in my case.
When I used Duplicity to backup, I would backup once week because the backup process was long and heavy on the disk array. Since I switched to ZFS send, I do it once an hour because there's almost no visible impact.
I'm now in the process of migrating my laptop to ZFS on root in order to be able to utilize ZFS send for regular full system backups. If successful, eventually I'll move all my machines to ZFS on root.
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Daily backups.
Currently using restic on my NixOS servers. To avoid data corruption, I make a zfs snapshot at 2am, and after that restic does a backup of my mutable data dirs both to my local Nas and CloudFlare r3.
The Nas backup folder is synced to backblaze nightly as well for a more cold store. -
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If you haven't tested your backups, you ain't got a backup.
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Beets.
Or bears.
Or buttsex.
It’s context dependent, like “cool”.
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Depends on the application. I run a nightly backup of a few VM's because realistically they dont change much. I have containers on the other hand that run critical (to me) systems like my photo backup and they are backed up twice a day.
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If Raid is backup, is Unraid forthdown or just data loss?
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I do not as I cannot afford the extra storage required to do so.
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I would but the other side isn't zfs so I went with borg instead
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I honestly don't have too much to back up, so I run one full backup job every Sunday for different directories I care about. They run a check on the directory and only back up any changes or new files. I don't have the space to backup everything, so I only take the smaller stuff and most important. The backup software also allows live monitoring if I enable it, so some of my jobs I have that turned on since I didn't see any reason not to. I reuse the NAS drives that report errors that I replace with new ones to save on money. So far, so good.
Backup software is Bvckup2, and reddit was a huge fan of it years ago, so I gave it a try. It was super cheap for a lifetime license at the time, and it's super lightweight. Sorry, there is no Linux version.
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Longest interval is every 24 hours. With some more frequent like every 6 hours or so, like the ones for my game servers.
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Not as o̸̯̪̳̫͗f̴̨͇̉̉̀ͅt̶̢̩̞̽̾̆ẽ̶̳n̸̩͓̯̼͑̃̀̉ ̶̛̜̘̠̉̍̕a̸̭͆̓̀s̴̙͚̮̣̊ ̷̮̽̀Ị̷̬͓̀̕ ̸̧̨̜̥̄͠s̴̖͈̮̈́̐h̴͚̙̲͒̈́͜o̷̞͂̋ü̴̫̃l̴͕̠̭͓̿ḏ̸̡̿̿
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No backup for my media. Only redundacy.
For my nextcloud data, anytime i made major changes.
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Just like the “s” in IoT stands for “security”
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I use Duplicati for my backups, and have backup retention set up like this:
Save one backup each day for the past week, then save one each week for the past month, then save one each month for the past year.
That way I have granual backups for anything recent, and the further back in the past you go the less frequent the backups are to save space
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Absolutely, my backup solution is actually based on BTRFS snapshots. I use btrbk (already mentioned in another reply) to take the snapshots and copy them to another drive. Then a nightly restic job backs up the latest snapshot to B2.
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That's good. You can also check out btrbk - it's a tool which can take snapshots for you, like Timeshift, but also back them up to somewhere.
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I classify the data according to its importance (gold, silver, bronze, ephemeral). The regularity of the zfs snapshots (15 minutes to several hours) and their retention time (days to years) on the server depends on this. I then send the more important data that I cannot restore or can only restore with great effort (gold and silver) to another server once a day. For bronze, the zfs snapshots and a few days of storage time on the server are enough for me, as it is usually data that I can restore (build artifacts or similar) or is simply not that important. Ephemeral is for unimportant data such as caches or pipelines.
