Considering the fact that the previous articles describe the concepts of Virtual SAN and its architecture, it is necessary to mention some important reasons for using this technology in the virtual world in the form of this article.
Streamline storage for vSphere structure administrators
The world of work for VMware vSphere administrators has become simpler with VMware Virtual SAN , and this technology has changed the way the storage controls are generally used for vSphere administrators, as a VMware-based solution for Hyper-Converge Infrastructure. With Virtual SAN, IT managers experience a simple storage process for virtual machines, which at the same time reduces ownership costs and provides predictability, scalability, and flexibility.
SSDs and HDDs attached to the server as the Virtual SAN Pool to provide a shared distribution Datastore are integrated into the Hypervisor. VSAN reduces the hardware involved in storage and provides an optimal Hyper Converge storage solution for virtual machines. In this article, we have carefully identified the advantages of using Virtual SAN, and in order to be more effective, we present a list of 10 important points about this technology.
1. No need for External Storage Array with Virtual SAN
VSANs, disks or flash drives on the server in the form of pools to create a separate and shared Datastore for each cluster. This means that there is no need for External Storage or Storage. Although, with Virtual SAN technology, there’s no need to use an external array, but VSAN will work alongside them. It’s easy to create policies that allow you to work on VSAN and external arrays, or easily migrate them to VMware vSphere Storage.
2- Virtual SAN design for use by vSphere structure managers
As we all know, vSphere administrators are busy and for that reason, each aspect of Virtual SAN is designed to be as simple as possible. For example, it’s not necessary to combine this technology with console or storage plugins, and all workflows are integrated seamlessly into the vCenter. This process is very desirable for vSphere administrators and suggests that Virtual SAN design, such as managing and managing storage, is not complicated.
3- Use policies to define the storage features by VSAN
With Virtual SAN, vSphere administrators create policies such as Protection Level, Striping, and Thin Provisioning. When preparing a new virtual machine, you can easily use existing policies. In addition, Virtual SAN automatically dynamically separates the required storage from a separate Datastore. Unlike external storage array, this technology does not require a predetermined level of performance and protection. Each virtual machine (and its vmdk) may have different policies if needed. For example, you can set a number of VMs to tolerate an error, set up items for tolerance to two errors, and some others that can not handle the error, and then combine them in a Datastore. Interestingly, if you change a policy, this technology will automatically make changes to the back end. Therefore, the above approach is much simpler and more efficient than traditional approaches.
4. Design Virtual SAN to select the best storage for VMs
Virtual SAN does not support common storage protocols such as iSCSI and NFS. Each virtual machine communicates with Virtual SAN using an internal protocol that is simpler and faster than standard storage protocols. However, if you plan to deploy the Virtual SAN capacity externally through iSCSI or NFS, good solutions will be available.
5. Virtual SAN significant speed
Virtual SAN can provide high levels of performance based on the type of hardware chosen, which is a very significant issue. As a result, the sensitive data path is optimized and there is no need to run I / O traffic through external array controllers. The Hybrid Virtual SAN (Flash and Disk combinations) can have a very low level performance similar to the All-Flash Array. Also, the All-Flash Virtual SAN version can also provide an extraordinary performance in an affordable way.
While more servers are added to the cluster, the function is linearly mapped. Each server can support multiple disk groups and can boost virtual SAN performance. In short, hardware means more capacity and speed, and more importantly, whatever hardware is faster and cheaper, Virtual SAN will be faster and cheaper.
we will examine the five final cases of the benefits of using Virtual SAN.