VxRail configuration
We conducted our tests on the following VxRail configuration:
- Six VxRail P570F systems, each configured with:
- Dual Intel 6226R processors (2.9 GHz)
- 768 GB RAM
- 25 GbE network connectivity
- Cache disk—Toshiba SAS PX05SMB080Y, 800 GB
- Capacity disks—Three KIOXIA KPM5XRUG3T84, 3.84 TB
- VxRail HCI System Software 7.0.100, which includes vSphere and vSAN 7.0 U1
To evaluate platform behavior with even faster cache drives, as described in Conclusion #5: NVMe cache drives provide maximum storage performance, we replaced the Intel processors and the Toshiba SAS cache disk with:
- One Intel Optane processor, 375 GB
- Two Samsung NVMe 1725b SSDs, 1,600 GB
VMs and working sets
In each VxRail node, we deployed two VMs. Each VM included:
- Eight VMDK disks
- 200 GB per VMDK
With this setup, we obtained the following working sets:
- Total allocated space—19,200 GB (1,600 GB per VM x 12 VMs)
- Total working set size for OLTP and RDBMS—7,200 GB (600 GB per VM x 12 VMs)
- Total working set size for sequential workloads and random reads—14,400 GB (1,200 GB per VM x 12 VMs)
- Total working set size for random writes—3,600 GB (300 GB per VM x 12 VMs)