Virtual SAN 6.2 & PowerCLI – Sparse Virtual Swap files

Virtual SAN 6.2 & PowerCLI – Sparse Virtual Swap files

One of the Space Efficiency features of Virtual SAN 6.2 that is available for both All-Flash and Hybrid configurations, is the introduction of Sparse Virtual Swap files. Swap files on Virtual SAN by default, are created with the .vswp 100% reserved. In a thin provisioned/guaranteed capacity perspective, it could be said that they effectively┬áLazy Zeroed Thick (LZT). Virtual Swap files (.vswp) are created when a virtual machine doesn’t have a memory reservation equal to the amount of memory the virtual…

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Virtual SAN Site Locality in low latency Stretched Clusters/2 Node Configs

Virtual SAN Site Locality in low latency Stretched Clusters/2 Node Configs

I was working with a customer last week, going over the configuration, setup, and requirements of Virtual SAN 6.1 when deploying a 2 node configuration. “Technically” this is a 2 node stretched cluster, comprised by two data nodes and a witness. Really a 1+1+1 configuration. One of the reasons for the call, was some confusion about the setup, which is fortunately documented in the Virtual SAN 6.1 Stretched Cluster Guide. Cormac Hogan created the initial content, and I took care…

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VSAN, SPBM Compliance, & PowerCLI

VSAN, SPBM Compliance, & PowerCLI

I very often tear down/distress my “lab” environment while working on docs/testing code/trying to replicate issues/etc. I was trying to recreate an issue the other day and decided to replace my vCenter Appliance. I deleted the VCSA, but left some of the other VMs, as they had some services I needed like DNS. After deploying the a new VCSA, I noticed an error in the Cluster’s Monitor tab, under Virtual SAN, specific to my VSAN objects. ┬áThe Compliance status for…

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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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Virtual SAN 6.1 and ROBO Edition

Virtual SAN 6.1 and ROBO Edition

Anyone who has ever had to buy infrastructure for remote or branch offices, or very small offices, has been faced with the predicament of choosing the right combination of capacity, performance, availability, and cost. It can be a daunting task, to keep costs down, while providing a capable and resilient platform for remote workers. What does it really take to service the needs of remote offices? Maybe a local Domain Controller for authentication, some DNS services, a local proxy of…

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