VSAN and vSphere Replication Interop

After spending a lot of time looking at the architecture of VSAN, I wanted to spend some time looking at how well it inter-operates with other vSphere products and features. vSphere Replication is a product which works quite well with VSAN. If you want to provide disaster-recovery using VSAN as a storage layer, you will need to use vSphere Replication version 5.5.1 which was released in March 2014. One thing with vSphere Replication is that it is agnostic to the underlying storage. Having said that, the consideration with using vSphere Replication with VSAN is down to the VM Storage Policies…

VSAN Part 18 – VM Home Namespace and VM Storage Policies

Well, VSAN is finally GA today. Check out Duncan’s blog post which has lots of good links about where to get the GA bits. In this post, I am going to address a question about the VM Home Namespace object on VSAN which has come up a number of times recently and has caused a little bit of confusion. If you’ve been following my series of Virtual SAN articles, you may recall that virtual machines deployed on a VSAN datastore are now made up as a set of objects (as opposed to the set of files that we’ve been used…

Getting started with Fusion-io and VSAN

I’ve been having lots of fun lately in my new role in Integration Engineering. It is also good to have someone local once again to bounce ideas off. Right now, that person is Paudie O’Riordan (although sometimes I bet he wishes I was in a different timezone 🙂 ). One of the things we are currently looking at is a VSAN implementation using Fusion-io ioDrive2 cards (which our friends over at Fusion-io kindly lent us). The purpose of this post is to show the steps involved in configuring these cards on ESXi and adding them as nodes to a VSAN…

Virtual SAN (VSAN) Announcement Review

Very exciting day today at VMware – Virtual SAN or VSAN has been officially announced. If you weren’t able to attend, here are some of the interesting parts of the announcement: 32 node support (up from the 16 node support announced at Partner Exchange last month, and up from the 8 nodes which we supported during the beta) 2 million IOPS (using IOmeter 100% read, 4KB block size). Also 640K IOPS achieved with 70/30 read/write ratio, 4KB block size and 80% random. 3200 virtual machines (100 per node) 4.4 PB of storage (using 35 disk per host x 32 hosts…

VSAN Part 17 – Removing a Disk Group from a Host

[Updated: 17th Feb 2016] Following on from my recent post on how to reclaim disks that were previously used by VSAN, I was asked how one can remove a disk group from a host that is participating in a VSAN [5.5] cluster. This is quite straight forward, but there is one minor caveat and it relates to whether the VSAN cluster has been setup in Automatic Mode or Manual Mode. If you want to learn more about the behaviour of the different modes, you can read up on it here.

VSAN Part 16 – Reclaiming disks for other uses

A number of customers have raised this question. How do you reclaim disks which were once used by VSAN but you now wish to use these disks for other purposes? Well, first off, if you are using some of the later builds of VSAN and you place the host into maintenance mode and remove the disk group from the host, this will automatically remove the partitions from the disks and you are good to go with reusing these disks for some other purpose. However, if you do something such as reinstall ESXi on the host but do not go through…