[lustre-discuss] mkfs.lustre for ZFS draid

[Laura Hild]

> But how can I address them when running mkfs.lustre, if I still want to get 7 OSTs out of it?

When we started using draid, we went from having six ten-disk OSTs per OSS to one sixty-disk OST per OSS.  I'm unsure why one would want seven OSTs on a single pool, being that if the pool becomes degraded all the OSTs would with it.  It would be as if you made a pool with seven raidz2 vdevs and created seven datasets.  The datasets do not correspond to individual vdevs, but rather all of the datasets use all of the vdevs.