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docs: warn about not running out of space
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@ -8,6 +8,29 @@ This chapter will get you started with |project_name|. The first section
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presents a simple step by step example that uses |project_name| to backup data.
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The next section continues by showing how backups can be automated.
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Important note about free space
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-------------------------------
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Before you start creating backups, please make sure that there is **always**
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a good amount of free space on the filesystem that has your backup repository
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(and also on ~/.cache). It is hard to tell how much, maybe 1-5%.
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If you run out of disk space, it can be hard or impossible to free space,
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because |project_name| needs free space to operate - even to delete backup
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archives.
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You can use some monitoring process or just include the free space information
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in your backup log files (you check them regularly anyway, right?).
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Also helpful:
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- create a big file as a "space reserve", that you can delete to free space
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- if you use LVM: use a LV + a filesystem that you can resize later and have
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some unallocated PEs you can add to the LV.
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- consider using quotas
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- use `prune` regularly
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A step by step example
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----------------------
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