2017-09-07 09:18 AM - edited 2017-09-07 09:22 AM
Upgraded from 8.3.1 to 9.1P5 using this method, just before 9.1P6 came out. Appeared to all be fine, but actually tanked performance on one of our NLSAS with FlashPool Aggregates within an hour of the upgrade. Support have been unable to identify why, and we have had to move high workload volumes off the aggregate to return to acceptable perfomance. Recommmend you collect perfstat using GUIPerfstat on your systems both before and after the upgrade, covering periods of low load and high load (e.g. Full Backups of VMs)
We have seen performance drop and not increase. Case has been open with support since 9th August 2017. Be smart, and be ready to be able to back up any claim that an upgrade has reduced perfomance, and to be able to give infomation so that NetApp support can find the cause and solve it. In the graph below of Aggregate Latency, where the line touches the x-axis is the upgrade. Line of best fit jumps 5ms up in latency within 20mins of the upgrade completing, permanently. This caused dropouts on VMs during peak load, and we were unable to complete Full Backups in a timely fasion.
NetApp Support are doing what they can, but without perfstat data from just before the upgrade, they are having a tough time finding the source of the loss in performance. Get perfstat data people. GET IT.
2017-10-04 12:43 AM
we also want to upgrade, but before, I wanted to ask you, if NetApp was able to resolve your perfromance issues?
2018-03-30 11:36 AM
Please find latest ANDU demo.
OnCommand System Manager 9.3, bundled with ONTAP 9.3 allows the user to upgrade easily between LTS release as Direct one Stage LTS upgrade.
This demo describes how the end-user can easily upgrade from one LTS (Long Term Service) release say 9.1 to its immediate LTS release 9.3.