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Tag: Stretched Clusters

vSAN Stretched Clusters & VM Swap Files

vSAN Stretched Clusters & VM Swap Files

My buddy Pete Koehler put together a good post a few days ago about SPBM Policies with vSAN Stretched ¬†Clusters: vSAN Operations: Use separate SPBM policies for VMs in stretched clusters In that post, he covers definition changes from Number of Failures to Tolerate (FTT) which was available in pre vSAN 6.6 builds, to Primary Failures to Tolerate (PFTT) in vSAN 6.6 and higher. This change was added to address the addition of local protection within a Stretched Cluster. This…

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VMware Virtual SAN Stretched Cluster Sizing Guidance

VMware Virtual SAN Stretched Cluster Sizing Guidance

With the release of Virtual SAN 6.1 in September, Stretched Clusters and 2 Node support was introduced. There has been some general guidance given around sizing some of the bandwidth between sites, as well as between the sites and the witness. How those bandwidth requirements are calculated hasn’t been publicly available. Site to site bandwidth is based on the number of writes a workload has, while site to witness bandwidth is based on the number of Virtual SAN components on…

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