zfs:structure:zpool
ZFS - Structure - zpool
The zpool is the uppermost ZFS structure.
- A zpool contains one or more vdevs, each of which in turn contains one or more devices.
- Zpools are self-contained units.
- One physical computer may have two or more separate zpools on it, but each is entirely independent of any others.
- Zpools cannot share vdevs with one another.
ZFS redundancy is at the vdev level, not the zpool level.
- There is absolutely no redundancy at the zpool level.
- If any storage vdev or SPECIAL vdev is lost, the entire zpool is lost with it!
Modern zpools can survive the loss of a CACHE or LOG vdev.
- They may lose a small amount of dirty data, if they lose a LOG vdev during a power outage or system crash.
A zpool is not a funny-looking RAID0.
- It is a funny-looking JBOD, with a complex distribution mechanism subject to change.
zfs/structure/zpool.txt · Last modified: 2021/10/13 00:18 by peter