StorageGRID slow progress on Decommissioning Replicated Data or ILM evaluation

Applies to

NetApp StorageGRID

Issue

StorageGRID reports slow progress on Maintenance > Decommission

• StorageGRID versions older than 11.4 will report Evaluating ILM
• StorageGRID versions newer than 11.4 will report Decommissioning Replicated Data

Support > GRID Topology > Primary Admin Node > CMN > Tasks will show the % of the decommissioning task progressing slowly or not at all

When enabling Decommission debug levels on the decommissioning node, it will repeately show the same object Waiting for data file to be truncated

To enable debug levels:

1. Login to the decommissioning node
2. Switch to root
3. Run: (echo "moduledebuglevel DCOM 1";sleep 1) | telnet 0 1402
4. Switch to the log folder: cd /var/local/log
5. Run: tail -f bycast.log | grep DCOM
6. Verify is the logs are showing a log similair to:
   • Feb 24 14:48:59 <nodename> ADE: |12983731 0734583769 DCOM CSRT 2023-02-24T14:48:59.113673| INFO     0405 e3e6699e31d46b7e DCOM: Waiting for data file /var/local/rangedb/0/p/02/1F/00qLyqjT>z-sgPRdr4$h to be truncated
7. After confirming above log, disable debug log levels again:
   • (echo "moduledebuglevel DCOM N";sleep 1) | telnet 0 1402
8. After confirming an object is being repeated as truncated, wait atleast 2x scan periods to see if the same object is still being listed.
   • The scan period can be viewed from the Dashboard (main page) in the StorageGRID GRID Manager
9. If after multiple scan periods, it is still waiting for the same object to be truncated, this KB applies.