The problem# I was running a Factorio multiplayer server and was being paranoid about making sure I didn't lose any save data. But I also didn't want to put the saves directory on my ZFS file system as it's on a hard drive, not an SSD, and saves taking too long can cause lag for the players...
The problem# ZFS datasets are a powerful way to organize your filesystems. At first glance, datasets look a lot like filesystems, so you may default to just one or at most a handful per pool. But unlike with traditional filesystems where you have to decide how much of your disk space each one gets...
The problem# When doing an incremental backup, any moved file on the source filesystem usually results in recopying the file to the destination filesystem. For a large file this can both be slow and possibly waste space if the destination keeps around deleted files (e.g. ZFS holding on to old...
The problem# I will often make copies of important files onto multiple devices, and then later make backups of all of those devices onto the same drive. At which point, I now have multiple redundant copies of those files within my backup. Tools like rdfind, fdupes, and jdupes exist to deal with...