Sun Storage 7000 Unified Storage System: RAIDZ2 Performance Issues With High I/O Wait Queues
(Doc ID 1315536.1)
Last updated on JANUARY 10, 2022
Applies to:
OPC ZFS ZS5-ES Rack - Version All Versions and laterGBUCS ZS7-2 Storage Rack - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS7-2 High-End - Version All Versions and later
Oracle ZFS Storage ZS7-2 High End TAA Compliant - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS7-2 for PCA/CatC - 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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In this Document
| Symptoms |
| Cause |
| Performance with raidz2 profile |
| Performance with mirror profile |
| Solution |
| References |