Hi all,
Hoping someone might be able to help. We have a HP 2040 with auto tiering, the disk groups, pools and volumes are configured like so:
4x 1TB SSD RAID5
9x 1.8TB 10k SAS RAID5
9x 1.8TB 10k SAS RAID5
All in a single Virtual Pool. In the virtual pool I have two volumes configured Vol1, Vol2 at 10TB (or there abouts) assigned as Cluster Shared Volumes (CSV) volumes are set to no affinity re-tiering as per the best practices.
I am using Windows 2016 with Hyper-V and failover clustering. We currently have two nodes.
Our hosts are directly connected via two 10g NICS (one to each controller) on the same IP subnet, for testing purposes I have disabled one NIC and configured round robin as failover only. Jumbo frames is not configured but even when it is the performance difference is negligable.
Performance wise from a Hyper-V VM I use IOMETER and I load a 20GB disk with 4kb 100% sequential write access profile and get a pitiful 8k IOPS.
From the Hyper-V host I do the same at get a better, but not by much, 18K IOPS. I know the 4KB 100% seq/write is a lousy real world test but should be one the SAN can easily fulfill to up to around 80,000IOPS from what I read.
Can't readily see any errors on the SAN or the host.
My question is, what the hell have I done wrong :)