Comparing VMware VSA & VMware Virtual SAN
在VMware官方发布Virtual SAN （VSAN）公开测试版不久，目前为止产生了很多对其的问题，许多人对vSphere Storage Appliance (VSA) and Virtual SAN (VSAN)之间的概念产生了混淆，故特此在此对两个解决方案进行差异对比。
也许两者在概念中有部分相似处，但是他们本质上具有很多不同
Attributes |
vSphere Storage Appliance |
VMware Virtual SAN |
| Description | Low cost, simple shared storage for small deployments | Scale-out distributed storage designed for virtualized/cloud environments |
| Form factor | Virtual Appliance | Built-in vSphere kernel |
| Ideal Targets |
Small SMB
ROBO deployments
|
Enterprise
Commercial
|
| Scalability |
2 to 3 vSphere servers
Does not scale beyond 3 hosts
|
Minimum 3 hosts deployments
Scale out to vSphere cluster size
|
| Performance | No SSD (low performance) | SSD caching (high performance) |
| Functionality |
Simple install & configure
Scales up to ~16TB usable storage
|
vCenter-integrated management
SSD caching and intelligent data placement
Rapid storage provisioning
Scale-out for large deployments
Granular scaling
Storage policy based management
|
希望以上简单对比能对两者进行更好的区分，
本文转自 五一 51CTO博客，原文链接:http://blog.51cto.com/728756/1340044
