> Why does resilvering take so long in raidz anyway? Because it's broken. There were some changes a while back that made it more broken.
There has been a lot of discussion, anecdotes and some data on this list. The resilver doesn't do a single pass of the drives, but uses a "smarter" temporal algorithm based on metadata. However, the current implentation has difficulty finishing the job if there's a steady flow of updates to the pool. As far as I'm aware, the only way to get bounded resilver times is to stop the workload until resilvering is completed. The problem exists for mirrors too, but is not as marked because mirror reconstruction is inherently simpler. I believe Oracle is aware of the problem, but most of the core ZFS team has left. And of course, a fix for Oracle Solaris no longer means a fix for the rest of us. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
