Pools

The Pools page is used to both create zpools and to cluster them to create a service. The main page shows the pools discovered on a local node:

In the above example pools pool1 and pool2 are both clustered and running on node-a, pool3 is an exported, unclustered pool and poollocal is only visible to node-a and therefore cannot be clustered.

Creating a Pool

To create a zpool click the + CREATE POOL button on the main pools page. You will then be presented with the pool configuration page:

Fill out the Pool name field and select the desired structure of the pool from the Pool Mode list. The cluster supports three types of layout when creating vdevs for a pool:

• raidz2 - Two of the drives are used as parity drives, meaning up to two drives can be lost in the vdev without impacting the pool. When striping raidz2 vdevs together each vdev can survive the loss of two of its members.
• mirror - Each drive in the vdev will be mirrored to another drive in the same vdev. Vdevs can then be striped together to build up a mirrored pool.
• jbod - Creates a simple pool of striped disks with no redundancy.

RAIDZ2 Pool

For this example a RAIDZ2 pool consisting of two five drive vdevs striped together, a log, a cache and a spare will be created. Five disks are selected for the first vdev, the desired Pool Name entered and raidz2 chosen from the Pool Mode list:

Click on DATA from the Add selected disks menu to configure the first vdev:

Next the second vdev is added, again using five drives, but this time selecting + New vdev from the DATA menu:

The resulting configuration depicts the two vdevs striped together:

Next a log disk is added by selecting one of the remaining available drives and clicking the LOG button:

The same is done for a cache and spare device giving the final configuration:

Finally click SUBMIT. The pool will now be created and will show up in the main pools page. Select the pool to show the pool details - device information can also be shown by clicking Show on the devices line:

Mirrored Pool

Mirrored pools are created by striping together individual mirrored vdevs.

Start by creating an individual mirrored vdev (in this example a two way mirror is created, but three, four way, etc. mirrors can be created if required):

Continue adding mirrored vdevs as required:

Finally click SUBMIT. The pool will now be created and will show up in the main pools page.

JBOD Pool (single stripe)

A jbod pool is a stripe of disks in a single vdev with no redundancy. Select individual disks and add them to the vdev using the data button:

Finally click SUBMIT. The pool will now be created and will show up in the main pools page.

Preparing a Pool to Cluster

Pools must be imported on one of the nodes before they can be clustered. Check their status by selecting the Pools option on the side menu.

In the following example pool1 and pool2 are already clustered and pool3 is going to be added to the cluster:

Firstly the pool need to be imported; select the Import Pool item from the Actions menu:

The status of the pool should now change to Imported and CLUSTERABLE:

The pool is now ready for clustering.

Clustering a Pool

Select the Cluster this pool item from the Actions menu:

Fill out the description and select the preferred node for the service:

With a shared-nothing pool the GUID's for each pool will be shown:

To add a virtual hostname to the service click Add in the Virtual Hostname panel. Enter the IP address, and optionally a hostname. For nodes with multiple network interfaces, use the drop down lists to select which interface the virtual hostname should be assigned to:

Finally, click the Create button; the pool will now show as CLUSTERED: