---
title: "Creating a QoS Policy"
slug: "creating-a-qos-policy-tg"
updated: 2026-10-27T17:23:23Z
published: 2026-10-27T17:23:23Z
canonical: "docs.vastdata.com/creating-a-qos-policy-tg"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Creating a QoS Policy

## Creating a QoS Policy in VAST Web UI

1. From the left navigation menu, select Element Store and then QoS Policies.
2. Click Create QoS Policy to open the Add QoS Policy dialog.
3. In the General tab:

  - Enter a name for the QoS policy in the Name field.
  - If you are going to create a QoS policy for views, choose View and proceed to [step 4](/docs-5-3/docs/en/creating-a-qos-policy-tg). If you are creating a QoS policy for users, choose User and proceed to [step 5](/docs-5-3/docs/en/creating-a-qos-policy-tg).

Depending on your choice, either View or User tab is now available, where you can make further settings.
4. To create a QoS policy for a view, complete the fields in the View tab:

  - In Limit QoS by, leave Read/Write (default) to be able to set different QoS limits per operation type (one for reads and another for writes), or select Total if you want to set QoS limits that cap the total amount of read, write and metadata operations.
  - Under Static Limits, specify [static QoS limits](/docs-5-3/docs/en/qos-overview-tg) per view.QoS Overview

For each of the limits , '0' means no limit is set.

    - Select an appropriate unit of measurement in the Units field.
    - To restrict the bandwidth, fill in the fields following the BW column:

      - Max. The maximum allowed bandwidth.
      - Burst. The maximum [burst](/docs-5-3/docs/en/qos-overview-tg) bandwidth that can be provided while there are accumulated bandwidth credits.QoS Overview
      - Credit. The maximum amount of bandwidth [credits](/docs-5-3/docs/en/qos-overview-tg) that can be accumulated.QoS Overview
    - To restrict the amount of IOPS, fill in the fields following the IOPS column:

      - Max. The maximum allowed IOPS.
      - Burst. The maximum [burst](/docs-5-3/docs/en/qos-overview-tg) IOPS that can be provided while there are accumulated IOPS credits.QoS Overview
      - Credit. The maximum amount of IOPS [credits](/docs-5-3/docs/en/qos-overview-tg) that can be accumulated.QoS Overview
  - Under Capacity Limits, specify [capacity-based QoS limits](/docs-5-3/docs/en/qos-overview-tg) per unit of used or provisioned logical capacity. QoS Overview

    - Choose whether you want to limit Used Capacity or Provisioned Capacity.

> [!NOTE]
> Note
> 
> Leaving the default value of None means no capacity-based limits are used.
    - Enter the limits in the fields below.

For each of the limits , '0' means no limit is set.

      - Read BW per GB. Maximum read bandwidth (in MB/s) to provision per GB of used or provisioned logical capacity.
      - Read IOPS per GB. Maximum read IOPS to provision per GB of used or provisioned logical capacity.
      - Write BW per GB. Maximum write bandwidth (in MB/s) to provision per GB of used or provisioned logical logical capacity.
      - Write IOPS per GB. Maximum write IOPS to provision per GB of used or provisioned logical capacity.
5. To create a QoS policy for one or more users, complete the fields in the User tab:

  - Determine the scope of the user QoS policy:

    - Set Use as default QoS policy if you want the policy to apply to all users.
    - Select Users to attach the policy to individual users. In the pane that opens:

      - Start typing a user name in the Select users field to look up and auto-populate users. Select a user in the dropdown and click Add User to add the entry to the list of users below.
  - Under Static Performance Limits, specify [static QoS limits](/docs-5-3/docs/en/qos-overview-tg) for user(s): QoS Overview

    - Select an appropriate unit of measurement in the Units field,
    - Enter the limits in the fields below.

For each of the limits , '0' means no limit is set.

      - To restrict the bandwidth, fill in the fields following the BW column, separately for Read and Write operations:

        - Max. The maximum allowed bandwidth.
        - Burst. The maximum [burst](/docs-5-3/docs/en/qos-overview-tg) bandwidth that can be provided while there are accumulated bandwidth credits.QoS Overview
        - Credit. The maximum amount of bandwidth [credits](/docs-5-3/docs/en/qos-overview-tg) that can be accumulated.QoS Overview
      - To restrict the amount of IOPS, fill in the fields following the IOPS column, separately for Read and Write operations:

        - Max. The maximum allowed IOPS.
        - Burst. The maximum [burst](/docs-5-3/docs/en/qos-overview-tg) IOPS that can be provided while there are accumulated IOPS credits.QoS Overview
        - Credit. The maximum amount of IOPS [credits](/docs-5-3/docs/en/qos-overview-tg) that can be accumulated.QoS Overview
    - Under S3 Client Connections Limits, optionally click Set Manually and enter the maximum allowed number of S3 connections in the S3 Maximum Connections field. if you do not want to restrict the number of S3 connections per user, use the default of Unlimited.
6. Click Create.

The QoS policy is created and can be assigned to views or users respectively.