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问题

群集利用率达到95％的空间用法使Windows Server崩溃

d
徽章
  • Dzeng
  • 冒险家
  • 3个答复

存储使用量达到95％，一些Windows VM（2016 2019）下降。

AHV管理程序20170830.395

释放后，磁盘空间应修复许多VM。

问题：

  1. 当容量达到95％时，AHV会关闭VM？
  2. 如果用户重新启动VM在95％时，它会使VM数据磁盘崩溃吗？
The storage usage reaches 95% and some windows VM (2016 2019)down.<\/p>

AHV hypervisor 20170830.395<\/p>

After release the disk space many VMs should be repaired.<\/p>

Questions:<\/p>

  1. AHV will shut down VM when the capacity reaches 95% ?\u00a0<\/li>\t
  2. If user reboot VM when it is 95% , will it make\u00a0 the VM data disks crashed ?<\/li><\/ol>","quoteUsername":"dzeng","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

3个答复

阿罗纳
秩
UserLevel 6
徽章 +5

你好 @dzeng

在这种情况下，AHV不会关闭VMS。发生的事情是，新的IO不仅仅是阅读，因此来宾操作系统崩溃了。磁盘会变成腐败吗？随着星际之门（存储服务）进入只读模式，这不太可能。因此保留了数据。但是，内存中的内容不能写入磁盘，而这又可能导致应用程序崩溃。

让我知道这是否有助于理解。

Hi @dzeng<\/user-mention>\u00a0<\/p>

AHV does not turn VMs off in this scenario. What happens is that new IO is not written only read so the guest OS crashes. Will the disk become corrupt? That is unlikely as stargate (storage service) goes into read-only mode. So the data is preserved. What is in the memory cannot be written to the disk however and that in turn can lead to the application crash.<\/p>

Let me know if that helps with understanding.<\/p>","quoteUsername":"Alona","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

d
徽章

你好 @Alona

感谢你的回复。我们在本周遇到了问题，许多VM崩溃了，我们花了48个小时进行维修。我知道ESXI群集存储使用情况是否达到95％，它将关闭VM以保护操作系统。AHV是否有机会将VMS关闭为ESXI？或对这种情况的任何更好的想法。

先感谢您

Hi @Alona<\/user-mention>\u00a0<\/p>

Thank you for your reply. We met the issue the week and many VMs crashed and we spend 48 hours to repair.\u00a0 As I know if the ESXI cluster storage usage reaches 95% it will shut down the VMs to protect the OS.\u00a0 Any chance that AHV can shutdown the VMs as ESXI ? Or any better idea for this kind of situation.<\/p>

Thank you in advance<\/p>","quoteUsername":"dzeng","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

阿罗纳
秩
UserLevel 6
徽章 +5

你好 @dzeng

在这种情况下，AHV不会暂停VM。如果环境经过精心计划，监视和照顾，则达到95％的存储利用情况不应该发生。

我会牢记一些问题来评估环境：

  • 什么是工作量？VDI，关键任务DB和应用程序，文件服务器？这些都有增长模式。例如，DBS可以迅速生长。虽然VDI在一天中的某些时间和一周中的某个时间都可以飙升。
  • “正常”存储使用水平是多少？这不是统计平均值，因为它不会给您一个有意义的数字。当它不到95％时，数字大部分时间都在哪里？
    它是否低于50％，并且数据突然快速增长（然后找到该来源，找到增长的原因，消除或管理根本原因，将源与其他工作负载隔离，并确保有足够的空间因为如果不可避免的是增长，它会扩展）？
    通常为80％吗？然后，毫不奇怪，在数据的增长过程中，存储利用率达到临界数字，并且您会为紧急清理和恢复的费力而充满挑战。
  • 存储尺寸是否正确用于工作负载？正常的存储利用率可能为50％，但由于总可用存储不够大，因此工作负载的正常和预期增长会使系统达到其临界状态。您会从存储扩展中受益吗？
  • 查看背景的任务。有太多快照吗？是否值得将快照的保留和/或时间表更改为更保守的东西？

以上只是几点。您更了解您的系统。预防是最好的政策。

Hi @dzeng<\/user-mention>\u00a0<\/p>

AHV does not suspend VMs in this situation. Reaching 95% storage utilisation is not something that should happen if the environment is well planned, monitored and looked after.<\/p>

I would assess the environment with a few questions in mind:<\/p>

  • what is the workload? VDI, mission-critical DBs and applications, file-servers? Each of those has a growth pattern. DBs can grow in size rapidly, for example. While VDIs can spike during certain times of the day and days of the week.<\/li>\t
  • What is the \u201cnormal\u201d level of storage utilisation? This is not a statistical average as it will not give you a meaningful number. When it\u2019s not at 95%, where does the number sit most of the time?
    \tIs it below 50% and there is a sudden rapid growth of data (then find that source, find the reason for the growth, eliminate or manage the root cause, isolate the source from the rest of the workloads potentially and ensure there is sufficient room for it expand if the growth is unavoidable)?
    \tIs it normally at 80%? Then it is not surprising that during the growth of data the storage utilisation reaches critical numbers and you are presented with a laborious and challenging task of emergency cleanup and recovery.<\/li>\t
  • Is the storage sized correctly for the workload? The normal storage utilisation may be at 50% but because total available storage is not big enough the normal and expected growth of the workload brings the system to its critical state. Would you benefit from storage expansion?<\/li>\t
  • Look at the tasks at the background. Are there too many snapshots? Would it be worth changing the retention and\/or schedule of the snapshots to something more conservative?<\/li><\/ul>

    Above are only a few points. You know your systems better. Prevention is the best policy, really.<\/p>","quoteUsername":"Alona","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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