Sun Storage 7000 Unified Storage System: RAIDZ2 Performance Issues With High I/O Wait Queues (Doc ID 1315536.1)

Last updated on JANUARY 11, 2016

Applies to:

Sun ZFS Storage 7320 - Version All Versions and later
Sun Storage 7110 Unified Storage System - Version All Versions and later
Sun ZFS Storage 7420 - Version All Versions and later
Sun Storage 7410 Unified Storage System - Version All Versions and later
Sun Storage 7310 Unified Storage System - Version All Versions and later
7000 Appliance OS (Fishworks)
NAS head revision : [not dependent]
BIOS revision : [not dependent]
ILOM revision : [not dependent]
JBODs Model : [not dependent]
CLUSTER related : [not dependent]


Symptoms

Lower than expected random read IO performance on 7000 series with RAIDz2 pool profile.

This is especially the case in pools with less than 15 spindles assigned to a single pool but applies to all raidz2 pools.


Cause

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