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About VMware

VMware is a leading information technology company that provides solutions for companies to manage IT operations. Some of the key software packages enable users to control cloud computing, data centers, end-user computing and virtualization both of desktops and data centers. From vCloud Suite to Workstation to vSphere to Fusion, you can find the right product or download for getting started right away on improving your IT operations. The software and systems solutions offered work with Linux, Mac or Windows operating systems, and support staff are able to assist you with any questions about installation or working with the program. You also have options for adding the Cloud mobile apps to give you the ability to manage your business from anywhere. Because of the importance of handling all kinds of IT issues.

VMware Virtual SAN (VSAN) is part of the burgeoning category of software defined everything that's assaulting all points from corporate datacenters to remote and branch offices. VMware describes VSAN as "hypervisor-converged storage" that is optimized for vSphere virtual infrastructure. However you refer to this space, the mission is more or less the same; to greatly simplify enterprise IT, reduce total cost of ownership and provide flexible scalability while delivering predictable performance. The path vendors take to achieve these quad-objectives is widely varied however. For their part VMware has a singular focus, to deliver against these goals in the most comprehensive, cost effective way for organizations using vSphere.

VSAN main benefit is the simplification of storage and storage management, while delivering more performance. VSAN gives administrators visibility into the storage layer through the virtual layer. It enables both compute and storage to be delivered to the VMs through a common virtualized platform. VSAN can be setup as either hybrid or all-flash. In the hybrid setup the SSDs act as a cache. In the all-flash setup the SSDs act as both a cache and as data persistence enable overall better performance. VSAN is embedded in the vSphere kernel and optimized the I/O path to minimize the impact on CPU. Management is simplified as well. Administrators only need to create policies and assign them to VMs, VSAN automatically takes care of the rest and any changes will be applied by VSAN as well.

VSAN is managed through the vSphere Web Client, like other VMware solutions. It is built into the hypervisor, meaning that there is no new software that needs to be downloaded and installed, outside of the lightweight VSAN plugin. VSAN can be deployed in a number of ways, including low cost, industry standard x86 components that can radically lower the initial cost of deployment. Alternatively, users have the option of buying a ready-node from a vendor such as Dell or HP that come ready to go out of the box, reducing complexity.

Aside from its ease-of-use, VSAN is simple to scale. With legacy hardware, when an organization needs more capacity they must buy a new box, shelf or disks, which can be expensive not to mention the time it takes to install it and integrate it with existing architecture. With VSAN administrators can just add new host to a cluster or add new disks to an existing host with empty bays. VSAN automatically takes care of the added capacity without disruption, enabling organizations to scale up just what they need, when the capacity is needed.

VSAN was recently updated enabling or enhancing a number of key features. The latest version of VSAN now supports up to 64 hosts per cluster, 200 VMs per host, and up to 6,400 VMs per cluster. With an all-flash configuration users can see a 4.5 x improvement in performance. Snapshot depth per VM went from 2 to 32 and virtual disk size went from 2TB to 62TB. VSAN is also now 'rack aware' meaning that VMs can be strategically placed across server racks to create better availability in the event of a complete rack power or networking failure.

Setup and Configuration

VSAN setup and configuration will be familiar to those who have logged time within vSphere. VSAN itself is more or less a plugin. Through the vSphere Web Client users will need to add all the storage-equipped hosts into a VSAN cluster. vSphere has a setup wizard that helps users through this process. Users need to select the hosts they wish to connect to the VSAN network, click on the add network icon, select the connection type, select the distributed port group, select port properties, select the IP settings (or retain the default) and then finish the wizard to add the VSAN network to the hosts.

If administrators choose manual configuration they will have to create disk groups through the disk management tab. Select a host and then select the create disk group icon. Each disk group has to one at least one SSD and one HDD (there can be up to six HDDs in each disk group). At least three of the hosts need to have disk groups created. Once the disk groups have been created, the VSAN datastore is available showing the aggregate storage capacity of the selected drives. Now VSAN is setup and ready to use.

Deploying and configuring VSAN is a simple process for those used to working in virtualized environments and especially for those that are familiar with vSphere and use it regularly. Most likely, if you are deploying VSAN you are a vSphere user and will have next to no issue. When all is said and done the VSAN-specific interaction moves back to your normal daily routine, with the exception that you now have a lot of shared storage and a highly resilient hyper-converged platform.