In case you have missed the VSAN 6.2 announce recently, there is also a PDF which has been released – What’s New with VMware Virtual SAN 6.2. The paper details what's already being announced about VSAN 6.2. Note that I have also had the details written in my post here – VMware VSAN 6.2 Announced – Nearline dedupe, Erasure Coding, QoS ++.
You'll find details Raid5/Raid6 (erasure coding), near-line deduplication and compression. Also QoS is interesting allowing to set an IOPs limit per VMDK eliminating the “noisy neighbor” problem. Feature that wasn't present in previous release of VSAN but VMware had SIOC but this feature worked at the datastore level without enough granularity.
VMware VSAN 6.2 is already the 4th release of VSAN allowing to use internal disk drives and SSDs (or SSDs only for All-Flash version) and create single datastore for your virtual environment. If you're interested in VSAN technology it's a paper which you would not like to miss…
The authors are Jeff Hunter and Jase McCarty from VMware.
The PDF has details about the latest version VMware VSAN 6.2 including some examples from the cluster metrics:
Take the example of a virtual machine with a number of failures to tolerate of 1, with a failure tolerance method of RAID-1 (Mirroring). For every write IO to a virtual disk, 2 will be seen on the backend. This is because two mirrors both receive a write, despite the fact that the virtual disk only had a single write. Changing the fault tolerance method to RAID-5/6 (Erasure Coding) will now require 4 writes, because data and parity in a RAID-5 configuration is comprised of 3 data writes and 1 parity write.
A screenshot from the paper:
And also about the monitoring of VSAN cluster, which is now much better.
New and improved features such as the performance and health services make it easier than ever to verify Virtual SAN configurations and closely monitor key metrics such as IOPs, throughput, and latency at the cluster, host, virtual machine, and virtual disk levels. Quality of service can be managed by using IOPs limits on a per-virtual machines and per-virtual disk basis.
VMware VSAN 6.2 PDF – What’s New with VMware Virtual SAN 6.2. Get your copy from this blog post source below.
Source: VMware
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