Highly Available SOFS On Clustered Storage Spaces

This article explains briefly about the design and steps required to deploy a highly available scale-out-file server (SOFS) on clustered storage spaces using Windows Server 2012 R2. 

Note: Here we are using only a single JBOD. But there are several storage spaces certified JBODs available in market (eg: DATAON) which are enclosure aware. That means when you are using multiple JBODs together, you will have data redundancy at the JBOD level too. 

1. JBOD is connected to both file servers using shared SAS HBA connectors
2. MPIO is enabled on both servers (SERVER 01/ 02)
3. Make sure JBOD disks are available to both servers
4. In this case we have total 24 disks (6 SSD and 18 SAS HDD)
5. Create new storage pool
1. By default all available disks are included in a pool named the primodial pool
2. If primodial pool is not listed under storage spaces, then it indicates that the storage doesn't meet requirements of storage spaces
3. If you select primodial pool, all available disks will be listed under physical disks
4. Select option create new storage pool
5. Give it a name
6. Select physical disks you want to be in the pool
7. Hot spares can be configured too at this stage
6. Verify new storage pool is listed under storage pools
7. Next step is to create virtual disks (these are not vhdx files, they call called spaces)
1. Now select the new storage pool that you have just created in step 5
2. Click on tasks, select new virtual disk
3. Give a name
4. Select the storage layout (Mirror, Parity, Simple)
5. Choose provisioning type (Thin, Fixed)
6. Specify size
8. Now create volumes
1. Right click the virtual disk (space) that you have just created in the previous step and select new volume
2. Select server name and then the virtual disk name
3. Specify volume size, drive letter, file system type, allocation unit size and volume label 
9. Create failover cluster using the 2 file servers
1. Provide a cluster name
2. Volumes that you created in step 8 will be listed as available volumes
3.  Add those as cluster shared volumes
4. Now it appears in C:\ClusterStorage\
10. Next step is to create a highly available SOFS
1. On failover cluster manager - roles - new clustered role - file server - file server for scale out application data (SOFS) 
2. Provide client access point name (eg: SMB-FS01)
3. Right click on SOFS role in failover cluster manager and select add shared folder
4. Choose SMB share server applications
5. Provide a name (eg: DATA01)
6. Local path to share (C:\ClusterStorage\volume1\shares\DATA01
7. Remote path to share (\\SMB-FS01\DATA01)

Now you have a highly available file share (\\SMB-FS01\DATA01) to store your virtual machine files which is built over clustered storage spaces.

Reference: Microsoft 

Hyper-V on Nutanix

This article explains briefly about Hyper-V on Nutanix virtual computing platform. The below figure shows a 'N' node Nutanix architecture, where each node is an independent server unit with a hypervisor, processor, memory and local storage (combination of SSD and HDD). Along with this there is a CVM (controller VM) through which storage resources are accessed.

'N' node Hyper-V over Nutanix architecture

Local storage from all the nodes are combined together to form a virtualized and unified storage pool by the Nutanix Distributed File System (NDFS). This can be considered as an advanced NAS which delivers a unified storage pool across the cluster and having features like striping, replication, error detection, failover, automatic recovery etc. From this pool shared storage resources are presented to the hypervisors using containers.



NDFS - Logical view of storage pool and containers

As mentioned above, each Hyper-V node has its own CVM which is shown below.

Hyper-V node with a CVM

PRISM console

View of storage pool in PRISM

View of containers in PRISM

Containers are mounted to Hyper-V as SMB 3.0 based file shares where virtual machine files are stored. This is shown below.

SMB 3.0 share path to store VHDs and VM configuration files

Once share path is given properly as mentioned above, you can create virtual machines on your Hyper-V server.