Database Reference
In-Depth Information
the right one and to make it easy to support. Depending on the model of platform
selected, a single 2U building block can include up to four nodes, combining up to 80
CPU cores (two sockets, 10 cores each per node), 2TB RAM (512GB per node), and
8TB of high-performance storage. These building blocks can be scaled out without any
artificial limits and provide linear performance as you add more VMs. If more capacity
is required per node, a different building block type with up to 16TB-20TB per 2RU
can be mixed and matched into a single NDFS cluster to balance both compute capacity
and storage capacity and performance. Typical performance from a 2RU building block
is up to a combined 100K 4KB Random Read IOs, up to 50K 4KB Random Write IOs,
1.4GBps sequential write throughput, and 3GBps sequential read throughput across four
NDFS nodes. These numbers were produced using the built-in Nutanix Diagnostics
Tool; actual application performance with mixed workloads will vary. You should
benchmark your particular applications and seek advice from Nutanix on your particular
virtualization scenarios. It should be noted that SQL Database predominant IO size will
be 64KB or above if you have followed the guidance so far in this chapter.
Figure 6.46
shows an overview of the Nutanix Virtual Computing Platform Architecture,
including each hypervisor host (VMware ESXi), SQL VMs (User VMs), Storage
Controller VM (Controller VM), and its local disks. Each Controller VM is directly
connected to the local storage controller and the connected disks using VMware
DirectPath/IO. By using local storage controllers on each ESXi host access to the NDFS
file system, the data access path is localized and doesn't always require transport over
the network, thereby reducing network traffic and potentially improving performance,
predominantly for read operations. NDFS ensures that writes are replicated and
distributes data within the cluster for data protection. The local storage controller on
each host ensures that storage performance as well as storage capacity increase when
additional nodes are added to a Nutanix NDFS cluster.
Figure 6.46
Nutanix Virtual Computing Platform Architecture overview.
Figure 6.47
shows an overview of a single Nutanix NDFS cluster combining many
