md_mirror:md_resync_bufsz

Description

Sets the size of the buffer used for resynchronizing RAID 1 volumes (mirrors), as the number of 512-byte blocks in the buffer. Setting larger values can increase resynchronization speed.

Data Type

Integer

Default

The default value is 128, which is acceptable for small systems. Larger systems could use higher values to increase mirror resynchronization speed.

Range

128 to 2048

Units

Blocks (512 bytes)

Dynamic?

No

Validation

None

When to Change

If you use Solaris Volume Manager RAID 1 volumes (mirrors) and you want to increase the speed of mirror resynchronizations. Assuming that you have adequate memory for overall system performance, you can increase this value without causing other performance problems.

If you need to increase the speed of mirror resynchronizations, increase the value of this parameter incrementally (using 128-block increments) until performance is satisfactory. On fairly large or relatively new systems, a value of 2048 seems to be optimal. High values on older systems might hang the system.

Commitment Level

Unstable