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关闭虚拟机Flash

  • 2019年5月3
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徽章 ＋1
是否有ACLI或NCLI命令来阻止虚拟机完全使用flash tier ?
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最佳答案JeremyJ2020年3月5日，17:00

@BSchaffer<\/user-mention>\u00a0<\/p>

While it\u2019s possible to pin an individual VM to the hot tier using Flash Mode<\/a>\u00a0there isn\u2019t currently an option to skip the hot tier or pin a VM to cold tier, at least at the VM level.\u00a0<\/p>

Like was mentioned by @MMSW_DE<\/user-mention>\u00a0it is possible to configure this at the container level from NCLI\u00a0(i.e. for all VMs and files in that container) but this is generally recommended against so the option won\u2019t show up in tab complete from the interactive NCLI.<\/p>

Because of the potential for negative impact (unexpected severe performance issues) I\u2019d recommend to discuss the use case with your Nutanix SE, or open a support case for the condition you\u2019re hoping to resolve through this change.\u00a0<\/p>","className":"post__content__best_answer"}">

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ddubuque
Userlevel 3
徽章 + 10
我相信简短的答案是否定的。防止系统依赖闪存层存储的唯一方法是确保你没有固定它。

根据设计，无论配置如何，任何持久的写和读都将放在闪存上。这就是数据流的工作方式。写入的extent将在一段时间后从闪存层存储中移除，当它被认为是冷数据时。

对于读操作，如果一个文件一直在读，那么它将被移动到SSD上，以减少读延迟。
你可以提出这个问题来寻求支持，但我相信没有完全绕过flash的命令。
David Dubuque || BKD || Nutanix NTC 2019 & 2020 || Nutanix技术咨询委员会成员|| https://darklinkrising.com
\r\n
\r\nBy design any persistent writes and reads will be placed on flash regardless of the configuration. This is just how the flow of data works. An extent written will be moved off of flash tier storage after a period of time when it's considered cold data.
\r\n
\r\nWith reads, if a file is constantly being read it will be moved onto SSD to reduce read latency.
\r\nYou can pose the question to support, but I believe there is no command to bypass flash altogether.","quoteUsername":"ddubuque","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
米
Userlevel 2
徽章 ＋5
你可以用ncli命令绕过每个容器的flash。
AntonioG
排名
Userlevel 2
徽章 ＋４

在容器方面Tier-wise用法图显示各硬盘层(SSD和DAS-SATA)占用容器存储空间百分比的饼图。

您可以从存储容器摘要视图文档。

In terms of Containers the\u00a0Tier-wise Usage<\/strong>\u00a0graph displays a pie chart divided into the percentage of container storage space used by each disk tier (SSD and DAS-SATA).<\/p>

\u00a0<\/p>

\"//www.jhbzcj.com/next/server-virtualization-27/\"<\/figure>

\u00a0<\/p>

You can get more information from the Storage Containers Summary View document.<\/a><\/p>","quoteUsername":"AntonioG","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

JeremyJ
排名
Userlevel 3
徽章 ＋４

@BSchaffer

虽然可以使用以下方法将单个VM固定到热层闪光模式目前还没有跳过热层或固定虚拟机到冷层的选项，至少在虚拟机级别。

像被提到过 @MMSW_DE可以通过NCLI在容器级别配置这个选项(例如，对于该容器中的所有虚拟机和文件)，但通常不建议这样做，所以这个选项不会在交互式NCLI中显示在tab complete中。

由于潜在的负面影响(意想不到的严重性能问题)，我建议与您的Nutanix SE讨论用例，或者为您希望通过此更改解决的情况打开一个支持用例。

@BSchaffer<\/user-mention>\u00a0<\/p>

While it\u2019s possible to pin an individual VM to the hot tier using Flash Mode<\/a>\u00a0there isn\u2019t currently an option to skip the hot tier or pin a VM to cold tier, at least at the VM level.\u00a0<\/p>

Like was mentioned by @MMSW_DE<\/user-mention>\u00a0it is possible to configure this at the container level from NCLI\u00a0(i.e. for all VMs and files in that container) but this is generally recommended against so the option won\u2019t show up in tab complete from the interactive NCLI.<\/p>

Because of the potential for negative impact (unexpected severe performance issues) I\u2019d recommend to discuss the use case with your Nutanix SE, or open a support case for the condition you\u2019re hoping to resolve through this change.\u00a0<\/p>","quoteUsername":"JeremyJ","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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