NGT系列|后解冻和预冻结脚本

  • 2019年10月30日
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HITESH0801
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徽章 ＋5

得到以下错误“VSS脚本未安装”在您的Nutanix环境与描述“VSS软件或pre_freeze/post_thaw脚本未安装”。


对VSS和上面提到的脚本感到困惑吗?

让我们帮助您了解VSS用于快照的用法!

当您启用Nutanix Guest工具时，VSS和应用程序一致性快照的以下特性默认是启用的。

Nutanix native in-guest VmQuiesced Snapshot Service (VSS)代理用于为所有支持VSS的虚拟机创建应用一致性快照。该机制可以在没有任何VM晕眩(临时无响应的VM)的情况下获得应用程序一致的快照，并允许第三方备份提供商(如CommVault和Rubrik)在Nutanix平台上以一种hypervisor无关的方式获取应用程序一致的快照。

那么pre_freeze/post_thaw有什么用呢?

在Windows虚拟机中，NGT将使用内置在操作系统中的Microsoft VSS编写器来静默虚拟机，以获取应用程序的一致性快照。Linux没有这些内置的工具，所以必须安装一个解冻前和解冻后的脚本来正确地暂停操作系统，以保证应用程序的一致性。如果您不安装这些脚本，预期的行为将是拥有与崩溃一致的快照而不是与应用程序一致的快照。

想知道更多关于脚本的信息吗?

Pre-Freeze | Post-thaw脚本

希望这对你有帮助!
Getting the following error \u201cVSS Scripts Not Installed\u201d in your Nutanix environment with the description \u201cVSS software or pre_freeze\/post_thaw Scripts Not Installed\u201d.<\/p>


Confused about VSS and the above-mentioned scripts?<\/p>

Let us help you understand the use of VSS for a snapshot!

When you are\u00a0enabling the Nutanix Guest tool, the following features VSS and Application consistent snapshot is enabled by default.<\/p>

Nutanix native in-guest VmQuiesced Snapshot Service (VSS) agent is used to take application-consistent snapshots for all the VMs that support VSS. This mechanism takes application-consistent snapshots without any VM stuns (temporary unresponsive VMs) and also enables third-party backup providers like CommVault and Rubrik to take application-consistent snapshots on the Nutanix platform in a hypervisor-agnostic manner.<\/p>

\u00a0<\/p>

What\u2019s the use of pre_freeze\/post_thaw then?<\/em>
\u00a0<\/p>

Within a Windows\u00a0VM, NGT will use the Microsoft VSS writer built into the OS to quiesce the VM to take the app consistent snapshot. Linux does not have these built-in tools so a pre and post-thaw script must be installed to correctly quiesce the OS for the app consistency. If you do not install these scripts expected behaviour is to have crash-consistent snapshots versus application consistent.<\/p>

\u00a0<\/p>

Want to know more about the scripts?

Pre-Freeze|Post-thaw Script\u00a0<\/a><\/p>","quoteUsername":"HITESH0801","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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