Hi Per,
Disk devices are used to create ZFS storage pools. Then, you create file
systems that can access all the available disk space in the storage
pool. ZFS file systems are not constrained to any physical disk in the
storage pool.
Consider that you will need to backup your data regardless of the size
of storage pool so you are constrained by the practical limits of what
you can actually manage. Be realistic.
Yes, you can create multiple virtual devices of physical drives, but
you can't stack those vdevs on top of each other.
See the ZFS best practices guide for other recommendations:
http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide
No real practical limits:
http://hub.opensolaris.org/bin/view/Community+Group+zfs/whatis
Thanks,
Cindy
On 12/22/10 02:55, Per Hojmark wrote:
1) What's the maximum number of disk devices that can be used to construct filesystems?
2) Is there a practical limit on #1? I've seen messages where folks suggested
40 physical devices is the practical maximum. That would seem to imply a
maximum single volume size of 80TB...
3) Are vdevs hierarchical? e.g. can I construct multiple vdevs of physical
drives, then construct filesystems by stacking/aggregating those vdevs together?
Thanks,
P.
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