Slow clone splits with all data in the cold tier
Applies to
- ONTAP 9
- FabricPool
- FlexClone Split
Issue
- A large clone volume (tens of TB or larger) is taking a long time to split and is stuck at 1% and may take years to finish
- Throughput is slow with the following command:
Cluster::> set -privilege diag; statistics show-periodic -object object_store_client_op_stats -counter throughput_bytes -instance=0_get
- The following clone was started on April 28 but was still at 1% as of May 17:
Thu xxx xx 18:39:29 -0400 [cluster: vv_config_worker19: wafl.volume.clone.split.started:info]: Clone split was started for volume vol01@vserver:abcdefgh-1234-5678-9012-1234567890ab Thu xxx xx 18:39:29 -0400 [cluster: scan_clone_split_wkr: wafl.scan.start:debug]: Starting volume clone split on volume vol01@vserver:abcdefgh-1234-5678-9012-1234567890ab.