April 20, 2022; Connecticut, USA. WAN latency does not contribute to VM latencies when a storage array fails in a VMware metro / stretched cluster when all storage IO is cached to VMware host Flash or RAM. This post discusses how VirtuCache did this for Mashantucket casinos, by explaining the…
Stretched Cluster
By caching all writes from VMs to VMware host SSD or RAM, VirtuCache reduces write latency for VMs that are deployed in a VMware Metro / Stretched Storage Cluster (vMSC), and eliminates latency of the WAN link from factoring into VM latencies, thus improving the performance of VMs however slow…
There are only a few applications, financial trading software being one example, that require very low latencies, lower even than what’s possible with an all-flash array (AFA). VirtuCache caching to in-host RAM results in lower VM latencies than an AFA. This is because RAM latencies are an order of magnitude…