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    • Higher read I/O latency with some bursty workloads
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Higher_read_I_O_latency_with_some_bursty_workloads
      High LUN or volume read latency with some bursty workloads seen as coming from disks.
    • Latency seen on Windows client on SQL Index Rebuild for a DB on 16 LUNs from CVO-HA
      https://kb.netapp.com/Cloud/Cloud_Volumes_ONTAP/Latency_seen_on_Windows_client_on_SQL_Index_Rebuild_for_a_DB_on_16_LUNs_from_CVO-HA
      SQL Database (DB) ISCSI LUNs on CVO read latency on Client side Windows client and Azure CVO in same vNET and no firewall ISCSI read latency upto 15 to 20ms seen on Windows client on SQL Index Rebuild...SQL Database (DB) ISCSI LUNs on CVO read latency on Client side Windows client and Azure CVO in same vNET and no firewall ISCSI read latency upto 15 to 20ms seen on Windows client on SQL Index Rebuild for a DB spread on 16 LUNs from CVO-HA. LUNs are configured one each per volume and all volumes located on one node on CVO-HA in active passive configuration. Packet traces between windows client and Azure CVO HA showed packet drops and old congestion control in play.
    • High read latency seen after controller upgrade from AFF-A400 to other platforms
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_read_latency_seen_after_controller_upgrade_from_AFF-A400_to_other_platforms
      Applies to ONTAP 9 Non AFF-A400 Issue High read latency is seen due to decompression after upgrading from an AFF A400 system.