> Does copy-on-write happen every time when any data block of ZFS is getting > modified?
Yes. (Data block or meta-data block, with the sole exception of the set of überblocks.) > Also where exactly COWed data written I'm not quite sure what you're asking here. Data, whether newly written or copy-on-write, goes to a newly allocated block, which may reside on any vdev, and will be spread across devices if using RAID. Anton This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
