解决了

在昏迷时间内的快照

  • 2020年8月4日
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vmware

你好云构建器

当我读NTNX圣经时，他们说虚拟机快照是通过冻结虚拟机获得的，不太可能在ESXi中，虚拟机被惊呆了

我的问题，而在NTNX平台上，当虚拟机被快照冻结时，I/O如何发生。

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最佳答案Alona2020年8月7日

Ok, so I do not have much for you and I apologise but I was able to find something.<\/p>

You know how hypervisor level snapshots and storage-level snapshots work differently traditional (I am tempted to put that word in quotes) environment and thus have different implications on the in-gues applications? For example a VM level snapshot would require a freeze of the I\/O but a volume level snapshot would come not noticeable or nearly not noticeable?<\/p>

Similar thing here. Nutanix is an HCI platform so we can operate with the block map on the storage layer and skip the stun entirely.<\/p>

That\u2019s what the Nutanix Bible paragraph meant. I sincerely hope that helps.<\/p>","className":"post__content__best_answer"}">

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如果这是一个非常基本的问题/回答，因为我是一个全新的NTNX。
Hi Cloud builder<\/p>

While I was reading the NTNX Bible they said that the VM snapshot being taked by freezing the VM, unlikely with ESXi where the VM is stunned \u00bb\u00a0Delta created for I\/Os and then VMDK is consolidated<\/p>

My question while on NTNX Platform how\/when the I\/O takes place while VM is being snapshot\u2019ed while its freeze.<\/p>","quoteUsername":"VMwarer","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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5回复

科塔克奈尔
排名
Userlevel 3
徽章 ＋４

嗨 @VMwarer

我请求回顾下面的帖子，我希望它能有所帮助

Nutanix保护域和VMware虚拟机快照——可以共存吗?

Alona
排名
Userlevel 6
徽章 ＋5

伊卜拉欣-你好,

我相信下面是你所指的《Nutanix Bible》的一部分?如果我误解了，请告诉我。

消除ESXi眩晕

ESXi使用VMware客户工具支持原生应用一致性快照。然而，在这个过程中，创建了增量磁盘，ESXi“眩晕”虚拟机，以便将虚拟磁盘重新映射到新的增量文件，这些文件将处理新的写IO。删除VMware快照时，也会出现眩晕现象。

在这个眩晕过程中，虚拟机的操作系统不能执行任何操作，本质上是处于一种“卡住”的状态(例如，ping失败，没有IO)。眩晕的持续时间取决于vmdks的数量和数据存储元数据操作的速度(例如创建新的增量磁盘等)。

通过使用Nutanix VSS，我们完全绕过了VMware快照/ stun进程，对性能或VM / OS可用性几乎没有影响。

Hi Ilyas,<\/p>

I believe the below is the part of the Nutanix Bible to which you are referring? Let me know if I misunderstood, please.<\/p>

Eliminating ESXi Stun<\/p>

ESXi has native app consistent snapshot support using VMware guest tools. However, during this process, delta disks are created and ESXi \"stuns\" the VM in order to remap the virtual disks to the new delta files which will handle the new write IO. Stuns will also occur when a VMware snapshot is deleted.<\/p>

During this stun process the VM its OS cannot execute any operations and is essentially in a \"stuck\" state (e.g. pings will fail, no IO). The duration of the stun will depend on the number of vmdks and speed of datastore metadata operations (e.g. create new delta disks, etc.)<\/p>

By using Nutanix VSS we completely bypass the VMware snapshot \/ stun process and have little to no impact to performance or VM \/ OS availability.<\/p><\/blockquote>

\u00a0<\/p>","quoteUsername":"Alona","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

vmware

伊卜拉欣-你好,

我相信下面是你所指的《Nutanix Bible》的一部分?如果我误解了，请告诉我。

消除ESXi眩晕

ESXi使用VMware客户工具支持原生应用一致性快照。然而，在这个过程中，创建了增量磁盘，ESXi“眩晕”虚拟机，以便将虚拟磁盘重新映射到新的增量文件，这些文件将处理新的写IO。删除VMware快照时，也会出现眩晕现象。

在这个眩晕过程中，虚拟机的操作系统不能执行任何操作，本质上是处于一种“卡住”的状态(例如，ping失败，没有IO)。眩晕的持续时间取决于vmdks的数量和数据存储元数据操作的速度(例如创建新的增量磁盘等)。

通过使用Nutanix VSS，我们完全绕过了VMware快照/ stun进程，对性能或VM / OS可用性几乎没有影响。

谢谢Alona和Neel

我将阅读它并更新线程:)

如果这是一个非常基本的问题/回答，因为我是一个全新的NTNX。
\t

Hi Ilyas,<\/p>\t

I believe the below is the part of the Nutanix Bible to which you are referring? Let me know if I misunderstood, please.<\/p>\t

\t

Eliminating ESXi Stun<\/p>\t

ESXi has native app consistent snapshot support using VMware guest tools. However, during this process, delta disks are created and ESXi \"stuns\" the VM in order to remap the virtual disks to the new delta files which will handle the new write IO. Stuns will also occur when a VMware snapshot is deleted.<\/p>\t

During this stun process the VM its OS cannot execute any operations and is essentially in a \"stuck\" state (e.g. pings will fail, no IO). The duration of the stun will depend on the number of vmdks and speed of datastore metadata operations (e.g. create new delta disks, etc.)<\/p>\t

By using Nutanix VSS we completely bypass the VMware snapshot \/ stun process and have little to no impact to performance or VM \/ OS availability.<\/p>\t<\/blockquote>\t

\u00a0<\/p>\t<\/content-quote>

Thanks\u00a0Alona and Neel<\/p>

I will read it and update the thread :)\u00a0<\/p>","quoteUsername":"VMwarer","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

Alona
排名
Userlevel 6
徽章 ＋5

好吧，我没有太多东西给你，我很抱歉，但我找到了一些东西。

您知道虚拟机管理程序级快照和存储级快照在传统环境(我很想用引号括起来)中不同的工作方式，从而对in-gues应用程序有不同的含义吗?例如，VM级快照需要冻结I/O，但卷级快照不会被注意到或几乎不被注意到?

类似的事情。Nutanix是一个HCI平台，所以我们可以使用存储层上的块地图进行操作，并完全跳过晕眩。

这就是《Nutanix圣经》一段的意思。我真诚地希望这能有所帮助。

Ok, so I do not have much for you and I apologise but I was able to find something.<\/p>

You know how hypervisor level snapshots and storage-level snapshots work differently traditional (I am tempted to put that word in quotes) environment and thus have different implications on the in-gues applications? For example a VM level snapshot would require a freeze of the I\/O but a volume level snapshot would come not noticeable or nearly not noticeable?<\/p>

Similar thing here. Nutanix is an HCI platform so we can operate with the block map on the storage layer and skip the stun entirely.<\/p>

That\u2019s what the Nutanix Bible paragraph meant. I sincerely hope that helps.<\/p>","quoteUsername":"Alona","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

vmware

谢谢Alona和团队

对不起，我迟到了一会儿，这有助于我理解。

我仍然在用NTNX重新连接我的大脑，但到目前为止一切都很顺利

再次感谢

如果这是一个非常基本的问题/回答，因为我是一个全新的NTNX。
Thanks Alona & Team<\/p>

Sorry for being late a little, this helps me for sure to be understand.<\/p>

I am rewiring my mind with NTNX still, but all is going well till now<\/p>

Thanks again<\/p>","quoteUsername":"VMwarer","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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