High NVRAM transfer latency on MetroCluster IP
Applies to
- ONTAP 9
- MetroCluster IP
- AFF A220
- AFF A250
- Remote direct memory access (RDMA)
- Internet Wide Area RDMA Protocol (iWARP)
Issue
- High latency on NFS/CIFS Volumes up to 10ms+
- High NVRAM transfer latency on AFF A220 and AFF A250 nodes configured as MetroCluster IP
- Increased latency observed on WRITE operations post ONTAP upgrade
- Data analysis shows high iWARP latency