Creating local storage policies

To apply custom redundancy schemes to VM volumes, you can create storage policies from scratch or clone existing policies.

Prerequisites

A clear understanding of these concepts: Storage policies, Data redundancy, Failure domains, and Storage tiers.

To create a policy for the local cluster

Admin panel

On the Compute > Storage > Storage policies tab, click Create storage policy.
In the Create storage policy window, specify a policy name and select Local storage cluster.
Select a tier, failure domain, and redundancy scheme.
Enable IOPS limit or Bandwidth limit to set the corresponding limits on the volume.
Click Create.

Command-line interface

Use the following command:

vinfra service compute storage-policy create --tier {0,1,2,3} (--replicas <norm>[:<min>] | --encoding <M>+<N>)
                                             --failure-domain {0,1,2,3,4}
                                             [--write-bytes-sec <limit>] [--read-bytes-sec <limit>]
                                             [--read-iops-sec <limit>] [--write-iops-sec <limit>]
                                             [--total-bytes-sec <limit>] [--total-iops-sec <limit>]
                                             <name>

--tier {0,1,2,3}

Storage tier

--encoding <M>+<N>

Storage erasure encoding mapping in the format:

M: number of data blocks
N: number of parity blocks

--failure-domain {0,1,2,3,4}

Storage failure domain

--replicas <norm>[:<min>]

Storage replication mapping in the format:

norm: number of replicas to maintain
min: minimum required number of replicas (optional)

--write-bytes-sec <limit>

Number of bytes written per second

--read-bytes-sec <limit>

Number of bytes read per second

--read-iops-sec <limit>

Number of read operations per second

--write-iops-sec <limit>

Number of write operations per second

--total-bytes-sec <bytes>

Total number of bytes per second

--total-iops-sec <iops>

Total number of I/O operations per second

<name>

Storage policy name

For example, to create a storage policy mystorpolicy with the tier 3, erasure coding 3+2 scheme, host failure domain, and the limits of 100 IOPS and 104857600 bytes per second, run:

# vinfra service compute storage-policy create mystorpolicy --tier 3 \
--encoding 3+2 --failure-domain 1 --total-bytes-sec 104857600 --total-iops-sec 100

The created storage policy will appear in the vinfra service compute storage-policy list output:

# vinfra service compute storage-policy list
+-------------+--------------+------+--------------+----------------+--------------------------------+
| id          | name         | tier | redundancy   | failure_domain | qos                            |
+-------------+--------------+------+--------------+----------------+--------------------------------+
| 97b55811<…> | mystorpolicy | 3    | encoding=3+2 | 1              | read_bytes_sec: -1             |
|             |              |      |              |                | read_bytes_sec_per_gb: -1      |
|             |              |      |              |                | read_bytes_sec_per_gb_min: -1  |
|             |              |      |              |                | read_iops_sec: -1              |
|             |              |      |              |                | read_iops_sec_per_gb: -1       |
|             |              |      |              |                | read_iops_sec_per_gb_min: -1   |
|             |              |      |              |                | total_bytes_sec: 104857600     |
|             |              |      |              |                | total_bytes_sec_per_gb: -1     |
|             |              |      |              |                | total_bytes_sec_per_gb_min: -1 |
|             |              |      |              |                | total_iops_sec: 100            |
|             |              |      |              |                | total_iops_sec_per_gb: -1      |
|             |              |      |              |                | total_iops_sec_per_gb_min: -1  |
|             |              |      |              |                | write_bytes_sec: -1            |
|             |              |      |              |                | write_bytes_sec_per_gb: -1     |
|             |              |      |              |                | write_bytes_sec_per_gb_min: -1 |
|             |              |      |              |                | write_iops_sec: -1             |
|             |              |      |              |                | write_iops_sec_per_gb: -1      |
|             |              |      |              |                | write_iops_sec_per_gb_min: -1  |
| 603bd56b<…> | default      | 0    | replicas=3   | 1              | read_bytes_sec: -1             |
|             |              |      |              |                | read_bytes_sec_per_gb: -1      |
|             |              |      |              |                | read_bytes_sec_per_gb_min: -1  |
|             |              |      |              |                | read_iops_sec: -1              |
|             |              |      |              |                | read_iops_sec_per_gb: -1       |
|             |              |      |              |                | read_iops_sec_per_gb_min: -1   |
|             |              |      |              |                | total_bytes_sec: -1            |
|             |              |      |              |                | total_bytes_sec_per_gb: -1     |
|             |              |      |              |                | total_bytes_sec_per_gb_min: -1 |
|             |              |      |              |                | total_iops_sec: -1             |
|             |              |      |              |                | total_iops_sec_per_gb: -1      |
|             |              |      |              |                | total_iops_sec_per_gb_min: -1  |
|             |              |      |              |                | write_bytes_sec: -1            |
|             |              |      |              |                | write_bytes_sec_per_gb: -1     |
|             |              |      |              |                | write_bytes_sec_per_gb_min: -1 |
|             |              |      |              |                | write_iops_sec: -1             |
|             |              |      |              |                | write_iops_sec_per_gb: -1      |
|             |              |      |              |                | write_iops_sec_per_gb_min: -1  |
+-------------+--------------+------+--------------+----------------+--------------------------------+

To clone a storage policy

On the Compute > Storage > Storage policies tab, select a policy from the list.
On the policy right pane, click Clone.
Modify the existing parameters or just leave them as they are, and then click Clone.