Users of VMware vSAN may experience issues such as high latency, cache breakdown, and performance degradation. While many factors can contribute to these problems, the design of storage architecture (e.g., I/O path and cache) plays a critical role. 

If you are troubled in the same way and seeking to upgrade your legacy IT infrastructure, here are some articles that can help you understand how vSAN works and how SmartX, with modernized HCI, can improve cluster performance and make IT simple.

VMware vs SmartX: Snapshot Mechanism and I/O Performance Comparison

Different from VMware vSphere snapshot which relies on redo-log files and disk chains, SMTX OS (SmartX HCI software) snapshot uses independent metadata to avoid snapshot traversal. It also uses a larger extent to contain data. These features effectively reduce latency and enable a rapid restoration of I/O performance after taking a snapshot.

VMware vs SmartX: Distributed Storage Caching Mechanism and Performance Comparison

Under the same data capacity and I/O read/write scenarios, ZBS’s (SmartX distributed block storage software) unified caching mechanism effectively improves cache space utilization and prevents cache breakdown. Even under an outbreak of data access requests, there is no drop in VM performance.

VMware vs SmartX: I/O Path Comparison and Performance Impact

Under the normal state and data recovery scenario, ZBS has a higher probability of local I/O and a theoretically lower latency than vSAN. vSAN, though, performs remote I/O frequently at normal state, it provides better I/O paths for VM migration.

You can find more information on Vmware and SmartX HCI’s scalability and how SmartX HCI’s unique features contribute to its critical capabilities from our previous blogs.

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