High CPU utilization with many concurrent 'block ownership' scanners
Applies to
ONTAP 8.1 7-Mode
Issue
Transition (TDP)
replication from 7-mode to C-mode is slow.- There are many background processes running such as:
NDMP, schedule snapshots
andsnapmirror.
- WAFL scans are taking a lot of CPU time in wafl_exempt and causing delays for
"Kahuna"
domain to run. - The Kahuna is a
Serialized WAFL
and on an average it is more than 80% utilized.