126: Low Distress Tolerance
I finished the OpenZFS Mastery chapter on volumes earlier this week.
Zvols support sparse volumes, also known as thin provisioning or overcommitting storage. A sparse volume is a volume that reserves less space than the volume actually needs. Sparse volumes permit allocating more space than the pool has available. You could, for example, create ten 1-exabyte sparse volumes on your 1 TiB dataset. So long as your volumes are never heavily used, nobody will notice that you’re overcommitted. Sparse volumes can be useful if you’re prepared to add more disks. Using a sparse volume means you can…
The skinny
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