Choosing the storage
While dealing with the different storage systems within OpenStack, you may wonder which option would be the best for your storage solution. Based on our previous discussions, you should be able to proceed into the next stage of discussion to question and validate the scenarios to your choice.
Why should your environment support block storage or file share and not object storage? Should you rely on the compute nodes to store your persistent storage drives? Alternatively, will the external storage nodes be more convenient, taking your budget into consideration? What about performance? Do the internal users only need reliable storage? Should they turn a blind eye to its performance capabilities? Do you need real redundant storage to meet the requirements of data-loss scenarios?
Keep in mind that there will be many possibilities. If you over engineer your storage design, you will invite complexity of deployment and maintenance.
Selecting the block storage for VMs storage backend...