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<title>Test the hard drive’s performance</title>
<title>Проверка производительности диска</title>
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<meta name="description" content="When installed to a cluster, the application’s performance and stability depends on the hard drive’s speed. A slow hard drive increases the request latency in the cluster and..." />
<meta name="description" content="Производительность и стабильность работы приложения в кластере зависит от скорости диска. Медленный диск увеличит задержку запросов в кластере и потенциально повредит его..." />
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<p><a href="elma365-on-premises.html">BRIX On-Premises</a> &gt; Other &gt; BRIX maintenance / Test the hard drive’s performance</p>
<p><a href="elma365-on-premises.html">ELMA365 On-Premises</a> &gt; Дополнительно &gt; Обслуживание ELMA365 / Проверка производительности диска</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">Test the hard drive’s performance</span></h1>
<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">Проверка производительности диска</span></h1>
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@ -109,15 +111,15 @@
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<!-- Placeholder for topic body. -->
<p class="p_Normal">When installed to a cluster, the application’s performance and stability depends on the hard drive’s speed. A slow hard drive increases the request latency in the cluster and can cause it to become unstable. We suggest that you use the <a href="https://github.com/axboe/fio" class="weblink">fio</a> tool to test the hard drive’s speed.</p>
<p class="p_Normal">Install and run fio to test your hard drive:</p>
<p class="p_Normal">Производительность и стабильность работы приложения в кластере зависит от скорости диска. Медленный диск увеличит задержку запросов в кластере и потенциально повредит его стабильность. Для проверки быстродействия диска предлагаем использовать инструмент <a href="https://github.com/axboe/fio" class="weblink">fio</a>.</p>
<p class="p_Normal">Установите и запустите <span style="font-weight: bold;">fio</span> для тестирования диска:</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">apt&nbsp;install&nbsp;fio</span><br />
<span class="f_CodeExample">mkdir&nbsp;test-data</span><br />
<span class="f_CodeExample">fio&nbsp;--rw=write&nbsp;--ioengine=sync&nbsp;--fdatasync=1&nbsp;--directory=test-data&nbsp;--size=100m&nbsp;--bs=2300&nbsp;--name=mytest</span></p>
<p class="p_Normal">In the <span style="font-weight: bold;">fdatasync</span> data section, we need to check the value of the 99.00th percentile. For the storage to be fast enough, the 99.00th percentile must be is less than 10 ms. For example, if the value is <code><b>2000</b></code>, the latency is 2 ms.<br />
Please note that the minimal IOPS of an entry must comply with the system requirements:</p>
<p class="p_Normal">В результате в разделе данных параметр <code><b>fdatasync</b></code> будет равен 99.00th процентиль. Чтобы хранилище было достаточно быстрым, 99.00th процентиль должен быть меньше 10мс. Например, значение равное 2000 будет означать 2мс задержки.</p>
<p class="p_Normal">Обратите внимание, что минимальный IOPS записи должен соответствовать системным требованиям:</p>
<ul style="list-style-type:disc">
<li style="line-height: 1.28; margin-top: 0; margin-right: 0; margin-bottom: 11px;"><a href="elma365-standard-on-premises.html" class="topiclink">System requirements for BRIX On-Premises Standard</a>.</li><li style="line-height: 1.28; margin-top: 0; margin-right: 0; margin-bottom: 11px;"><a href="elma365-enterprise-on-premises.html" class="topiclink">System requirements for BRIX On-Premises Enterprise</a>.</li></ul>
<li class="p_Normal"><a href="elma365-standard-on-premises.html" class="topiclink">«Системные требования ELMA365 On-Premises Standard»</a>;</li><li class="p_Normal"><a href="elma365-enterprise-on-premises.html" class="topiclink">«Системные требования ELMA365 On-Premises Enterprise»</a>.</li></ul>
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