The controller can access all storage without hypervisor intervention through the VMware VM_DIRECT_PATH feature. In the VMware vSphere environment, the controller occupies a virtual machine with a dedicated number of processor cores and amount of memory, allowing it to deliver consistent performance and not affect the performance of the other virtual machines on the cluster. As nodes are added, the cluster scales linearly to deliver computing, storage capacity, and I/O performance. Nodes access data through a data layer using file, block, object, and API plug-ins. The controllers communicate with each other over 10 Gigabit Ethernet to present a single pool of storage that spans the nodes in the cluster (Figure 2). Each node includes a Cisco HyperFlex HX Data Platform controller that implements the distributed file system using internal flash-based SSD drives and high-capacity HDDs to store data. In Cisco HyperFlex Systems, the data platform spans three or more Cisco HyperFlex HX-Series nodes to create a highly available cluster. After I have introduced an overview of HyperFlex in my last blog, let me explain with this one a little bit the architecture of HyperFlex and how it works.
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