Hi Brad, RAID-Z will carve up the 8K blocks into chunks at the granularity of the sector size -- today 512 bytes but soon going to 4K. In this case a 9-disk RAID-Z vdev will look like this:
| P | D00 | D01 | D02 | D03 | D04 | D05 | D06 | D07 | | P | D08 | D09 | D10 | D11 | D12 | D13 | D14 | D15 | 1K per device with an additional 1K for parity. Adam On Jan 4, 2010, at 3:17 PM, Brad wrote: > If a 8K file system block is written on a 9 disk raidz vdev, how is the data > distributed (writtened) between all devices in the vdev since a zfs write is > one continuously IO operation? > > Is it distributed evenly (1.125KB) per device? > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Adam Leventhal, Fishworks http://blogs.sun.com/ahl _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
