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    • Is the Network Port DCB configurable on NetApp to match the Cisco Switch settings?
      https://kb.netapp.com/on-prem/Switches/Cisco-KBs/Is_the_Network_Port_DCB_configurable_on_NetApp_to_match_the_Cisco_Switch_settings
      Any changes made with regards to QoS/CoS/ DCB on Cisco Switch should reflect immediately on NetApp Storage. There is no specific configuration change required from ONTAP. Use dcb show command on ONTAP...Any changes made with regards to QoS/CoS/ DCB on Cisco Switch should reflect immediately on NetApp Storage. There is no specific configuration change required from ONTAP. Use dcb show command on ONTAP to verify the settings. Interface PGID Priority Application Bandwidth --------- ---- ---------- ------------ ------------ e3a 0 0 1 2 4 5 6 7 unassigned 50% 1 3 FCoE 50% e3b 0 0 1 2 3 4 5 6 7 unassigned 0% e4a 0 0 1 2 4 5 6 7 unassigned 50% 1 3 FCoE 50% e4b 0 0 1 2 3 4 5 6 7 unassigned 0%
    • Why are all layer 2 packets flagged with COS4?
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Why_are_all_layer_2_packets_flagged_with_COS4
      This is default, all storage related layer 2 packets are flagged with COS4 (ONTAP sets the QoS priority bit to 4 for all tagged packets) Feature Request 1098263 has been created to change this behavio...This is default, all storage related layer 2 packets are flagged with COS4 (ONTAP sets the QoS priority bit to 4 for all tagged packets) Feature Request 1098263 has been created to change this behaviour (making it configurable) Cisco describes a switch based method to remark the packets with COS0. Please contact NetApp Technical Support or log into the NetApp Support Site to create a case to get your request added as a vote to the enhancement request.
    • AutoSupport Message: The sum of all minimum QoS IOPS is greater than the expected IOPS
      https://kb.netapp.com/on-prem/solidfire/Element_OS_Kbs/AutoSupport_Message__The_sum_of_all_minimum_QoS_IOPS_is_greater_than_the_expected_IOPS
      On NetApp SolidFire Active IQ: error message: The sum of all minimum QoS IOPS <current_IOPS_count> is greater than the expected IOPS <max_IOPS_for_cluster> of the cluster.
    • Latency increases suddenly while using QoS - Resolution Guide
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Latency_increases_suddenly_while_using_QoS_-_Resolution_Guide
      When using a QoS policy, QoS latency will suddenly increase Network Exempt utilization - CPU processing for protocol ops - will increase. Users may report intermittent slowness/latency issue whenever ...When using a QoS policy, QoS latency will suddenly increase Network Exempt utilization - CPU processing for protocol ops - will increase. Users may report intermittent slowness/latency issue whenever QOS max limit is reached, due to the saturated Network Exempt processing domain. Delay from Network Processing, also called CPU N-Blade or Network Exempt (Nwk_Exmpt) Performing any test (like running dd commands) on the client end report high latency due to bursty workload in nature.
    • How to check for QoS pushback in Element Software
      https://kb.netapp.com/on-prem/solidfire/Element_OS_Kbs/How_to_check_for_QoS_pushback_in_Element_Software
      Applies to NetApp Element software Description Process for determining if there is Quality of Service (QoS) pushback in a SolidFire storage cluster
    • RESTful API and System Manager are not returning volume statistics
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/RESTful_API_and_System_Manager_are_not_returning_volume_statistics
      RESTful API System Manager REST Command: GET for /storage/volumes/<instance-UUID> returns no volume statistics. However, statistics can be pulled from the CLI ::> qos statistics volume latency show -v...RESTful API System Manager REST Command: GET for /storage/volumes/<instance-UUID> returns no volume statistics. However, statistics can be pulled from the CLI ::> qos statistics volume latency show -volume vol_xxx Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA AVSCAN -total- - 600.00us 52.00us 10.00us 62.00us 0ms 469.00us 0ms 7.00us 0ms 0ms 0ms 0ms 0ms vol_xxx.. 22280 99.00us 43.00us 0ms 56.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms
    • Command failed: This command is being run in five other sessions, the maximum that is supported
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Command_failed__This_command_is_being_run_in_five_other_sessions_the_maximum_that_is_supported
      Applies to Clustered Data ONTAP 8.2.x Issue When using a SSH session we must properly terminate the running commands or we will have stale sessions. NETAPP-01::> qos statistics workload characteristic...Applies to Clustered Data ONTAP 8.2.x Issue When using a SSH session we must properly terminate the running commands or we will have stale sessions. NETAPP-01::> qos statistics workload characteristics show -refresh-display true Error: command failed: This command is being run in five other sessions, the maximum that is supported. Terminate the command in one of those sessions or wait and try again later.
    • What operations are categorized under Other IOPS in ONTAP?
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/What_operations_are_categorized_under_Other_IOPS_in_ONTAP
      For NAS workloads (CIFS/NFS), anything that involves metadata or manipulation of a file or folder. Procedure 6: READ - Read From file Procedure 8: CREATE - Create a file Procedure 9: MKDIR - Create a ...For NAS workloads (CIFS/NFS), anything that involves metadata or manipulation of a file or folder. Procedure 6: READ - Read From file Procedure 8: CREATE - Create a file Procedure 9: MKDIR - Create a directory Procedure 10: SYMLINK - Create a symbolic link Procedure 12: REMOVE - Remove a File Procedure 14: RENAME - Rename a File or Directory Procedure 21: COMMIT - Commit cached data on a server to stable storage How do I tell what "other" NFS iops are being processed within my volume?
    • Intermittent NFS slowness
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Intermittent_NFS_slowness
      Applies to ONTAP 9 Issue Accessing files over NFS is intermittently slow
    • How the per-volume throttle value gets calculated on SolidFire ActiveIQ ?
      https://kb.netapp.com/on-prem/solidfire/Element_OS_Kbs/How_the_per_volume_throttle_value_gets_calculated_on_SolidFire_ActiveIQ
      Applies to Active Volume Information Page on SolidFire ActiveIQ Throttle is calculated by 100 – (targetIOPS / maxIOPS) * 100. Target IOPS start being smaller than maxIOPS when the system decides sacri...Applies to Active Volume Information Page on SolidFire ActiveIQ Throttle is calculated by 100 – (targetIOPS / maxIOPS) * 100. Target IOPS start being smaller than maxIOPS when the system decides sacrificing maxIOPS to guarantee minIOPS of all volumes on a node. AIQ Collector is collecting last 500 ms of the throttle information every 60 seconds from SolidFire Storage Cluster. Please refer to NetApp SolidFire Quality of Service (QoS) for understanding how QoS works in Element Software.
    • Newly configured Qtree QoS policies may not be enforced on existing NFS mount points
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Newly_configured_Qtree_QoS_policies_may_not_be_enforced_on_existing_NFS_mount_points
      Applies to ONTAP 9.8 or later Quality of Service (QoS) Issue Newly configured qtree QoS policy may not be enforced on existing NFS mount points. ::*> volume qtree modify -volume vol1_svm2 -qtree qtree...Applies to ONTAP 9.8 or later Quality of Service (QoS) Issue Newly configured qtree QoS policy may not be enforced on existing NFS mount points. ::*> volume qtree modify -volume vol1_svm2 -qtree qtree1 -qos-policy-group pg1 -vserver svm2_ontap99 Info: The newly configured qtree QoS policy may not be enforced on existing NFS mount points. You should re-mount them to ensure enforcement of the QoS policy. For further assistance, contact technical support.