focus on network I/O rate or concurrent sessions. For a key-value storage system, this measurement might be transactions and retrievals per <span>second</span>.
                                    </p>
                                </dd>
                                
                                <dd>
                                    <p>
                                        <a data-type="indexterm" data-primary="error rates" id="id-x1C4SjSlTLIMUJ"></a><a data-type="indexterm" data-primary="user