Паравиртуализация XEN или решаем проблемы с производительностью

Паравиртуальные драйверы Xen — специальный вид драйверов устройств, которые используются в гостевой системе в домене Xen (в общем случае паравиртуальным драйвером может называться и та часть паравиртуального интерфейса ввода/вывода, которая находится в домене 0) и осуществляют операции ввода/вывода не через эмулируемые устройства, как это делают обычные драйверы, а при помощи специального интерфейса, предоставляемого системой виртуализации и хост-системой. Одна из главных причин разработки и использования паравиртуальных драйверов — возможность существенного повышения производительности работы гостевых систем, работающих в режиме полной виртуализации.

Недавно я столкнулся с проблемой гостевой ОС Windows Server 2008. Проблема заключалась в том, что производительность жестких дисков была очень медленной. Скорость копирования с раздела на раздел не превышала 5 МБ/с. Решением проблемы было установка паравиртуальных драйверов на гостевой ОС.

Драйвера можно скачать по ссылке. В моем случае это были драйвера gplpv_Vista2008x64_0.11.0.372.msi. На всякий случай сделайте резервную копию сервера. После чего, установите драйвера и перезагрузите систему.

После установки драйверов – производительность Windows Server 2008 поднялась до 100 МБ/c

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