Oracle ZFS Storage Appliance: Performance Issue when Pool is almost Full
Last updated on AUGUST 26, 2016
Applies to:Sun Storage 7110 Unified Storage System - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Sun Storage 7410 Unified Storage System - Version All Versions and later
Sun ZFS Storage 7320 - Version All Versions and later
Sun Storage 7210 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]
Older firmware versions suffered from performance problems when storage pools are beyond some usage (80%). This is no longer the case, with all supported current Appliance Firmware releases.
There is now no such threshold, such that we will be missing space on disk and having write failures in the first place when the pool becomes full.
We will no longer experience degraded I/O performance, when performing write operations, but get IO errors and conclude that some clean up is needed in order to empty on-disk space for new data.
- - Pool usage
cli> status show
Used 8.58T bytes
Avail 496B bytes
- - Share usage
Here, default is the project, fs01 is a filesystem inside the project.
cli> shares select default select fs01 show
space_available = 495G
space_total = 49K
root_group = other
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