public Integer getIops() {
        return this.iops;
    }
<p>
The number of I/O operations per second (IOPS). For <code>gp3</code>, <code>io1</code>, and <code>io2</code>
volumes, this represents the number of IOPS that are provisioned for the volume. For <code>gp2</code> volumes,
this represents the baseline performance of the volume and the rate at which the volume accumulates I/O credits
for bursting.
</p>
<p>
The following are the supported values for each volume type:
</p>
<ul>
<li>
<p>
<code>gp3</code>: 3,000 - 16,000 IOPS
</p>
</li>
<li>
<p>
<code>io1</code>: 100 - 64,000 IOPS
</p>
</li>
<li>
<p>
<code>io2</code>: 100 - 256,000 IOPS
</p>
</li>
</ul>
<p>
For <code>io2</code> volumes, you can achieve up to 256,000 IOPS on <a
href="https://docs.aws.amazon.com/ec2/latest/instancetypes/ec2-nitro-instances.html">instances built on the Nitro
System</a>. On other instances, you can achieve performance up to 32,000 IOPS.
</p>
<p>
This parameter is required for <code>io1</code> and <code>io2</code> volumes. The default for <code>gp3</code>
volumes is 3,000 IOPS. This parameter is not supported for <code>gp2</code>, <code>st1</code>, <code>sc1</code>,
or <code>standard</code> volumes.
</p>

@return The number of I/O operations per second (IOPS). For <code>gp3</code>, <code>io1</code>, and
        <code>io2</code> volumes, this represents the number of IOPS that are provisioned for the volume. For
        <code>gp2</code> volumes, this represents the baseline performance of the volume and the rate at which
        the volume accumulates I/O credits for bursting.</p>
        <p>
        The following are the supported values for each volume type:
        </p>
        <ul>
        <li>
        <p>
        <code>gp3</code>: 3,000 - 16,000 IOPS
        </p>
        </li>
        <li>
        <p>
        <code>io1</code>: 100 - 64,000 IOPS
        </p>
        </li>
        <li>
        <p>
        <code>io2</code>: 100 - 256,000 IOPS
        </p>
        </li>
        </ul>
        <p>
        For <code>io2</code> volumes, you can achieve up to 256,000 IOPS on <a
        href="https://docs.aws.amazon.com/ec2/latest/instancetypes/ec2-nitro-instances.html">instances built on
        the Nitro System</a>. On other instances, you can achieve performance up to 32,000 IOPS.
        </p>
        <p>
        This parameter is required for <code>io1</code> and <code>io2</code> volumes. The default for
        <code>gp3</code> volumes is 3,000 IOPS. This parameter is not supported for <code>gp2</code>,
        <code>st1</code>, <code>sc1</code>, or <code>standard</code> volumes.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateVolumeRequest.java