Non-Root Pool Creation Practices
-
Create non-root pools with whole disks by using the
d*
identifier. Do not use thep*
identifier.-
ZFS works best without any additional volume management software.
-
For better performance, use individual disks or at least LUNs made up of just a few disks. By providing ZFS with more visibility into the LUNs setup, ZFS is able to make better I/O scheduling decisions.
-
-
Create redundant pool configurations across multiple controllers to reduce down time due to a controller failure.
-
Mirrored storage pools – Consume more disk space but generally perform better with small random reads.
$ zpool create system1 mirror c1d0 c2d0 mirror c3d0 c4d0
-
RAID-Z storage pools – Can be created with 3 parity strategies, where parity equals 1
raidz
), 2raidz2
), or 3raidz3
). A RAID-Z configuration maximizes disk space and generally performs well when data is written and read in large chunks (128K or more).-
Consider a single-parity RAID-Z
raidz
) configuration with 2 VDEVs of 3 disks (2+1) each.$ zpool create rzpool raidz1 c1t0d0 c2t0d0 c3t0d0 raidz1 c1t1d0 c2t1d0 c3t1d0
-
A RAIDZ-2 configuration offers better data availability, and performs similarly to RAID-Z. RAIDZ-2 has significantly better mean time to data loss (MTTDL) than either RAID-Z or 2-way mirrors. Create a double-parity RAID-Z
raidz2
) configuration at 6 disks (4+2).$ zpool create rzpool raidz2 c0t1d0 c1t1d0 c4t1d0 c5t1d0 c6t1d0 c7t1d0 raidz2 c0t2d0 c1t2d0 c4t2d0 c5t2d0 c6t2d0 c7t2d
-
A RAIDZ-3 configuration maximizes disk space and offers excellent availability because it can withstand 3 disk failures. Create a triple-parity RAID-Z (
raidz3
) configuration at 9 disks (6+3).$ zpool create rzpool raidz3 c0t0d0 c1t0d0 c2t0d0 c3t0d0 c4t0d0 c5t0d0 c6t0d0 c7t0d0 c8t0d0
-
-