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问题

真正可在具有较厚配置VM的容器中可用的空间

4年前
2019年1月22日
2个答复
1593年的观点

Stefano P.
探路者
0答复

大家好，

我们正在执行一个POC，并且有一个群集，该集群原产约30个由SSD+ HDD制成的可用空间。然后，为了向客户展示绩效的改进到所有Flash，我们进行了内联转换Addind SSD并删除所有HDD，现在我们拥有一个可用的空间约为11个TIB。

存储容器具有压缩启用，实际使用的容量为4,5 TIB。

问题在于，大多数VM都是较厚的配置，并且实际使用空间在12个tib上的据报道，因此高于可用容量。这触发了棱镜控制台上的红色警报，称他的数据弹性不可用。

所以我有2个问题：

1）由于实际使用的容量为4,5 TIB，如果磁盘故障发生了什么？

2）我们如何设法消除这些警报？

问题2）特别重要，因为如果我们在POC中取得成功，并且客户可以购买Nutanix所有闪存系统，他们希望在不更改政策并利用Nutanix的数据降低功能的情况下使用它们。

。

如今，他们有许多VMware群集和纯存储系统，它们使用LUN在背景中压缩和涂抹的LUN，而无需“抱怨”有关厚厚的供应...

事先感谢您的任何建议。

Stefano

1个附件

\r\n

\r\nwe are performing a POC and we have a cluster that originallly had about 30 Tib of available space made of SSD+ HDD. Then, to show the customer the performance improvement moving to All Flash we made an inline conversion addind SSD and removing all the HDD and now we have a total available space is about 11 TiB.

\r\n

\r\nThe storage container has compression enable and the real used capacity is 4,5 Tib.

\r\n

\r\nThe problem is that most of the VM are thick provisioned and the actual use space is reported at 12 Tib hence above the available capacity. This triggers RED alarms on the Prism console saying that he Data Resiliency is not available.

\r\n

\r\nSo I have 2 questions:

\r\n

\r\n1) since the actual used capacity is 4,5 Tib what happens in case of a disk failure?

\r\n2) how can we manage to eliminate these alarms?

\r\n

\r\n

\r\nQuestion number 2) is particularly relevant since if we succeed in the POC and the customer could purchase Nutanix all flash systems , they will like to use them without changing their policies and exploitining the data reduction functionalities of Nutanix.

\r\n.

\r\nToday they have many VMware cluster with Pure Storage systems that use LUNs compressed and deduped in the background without \"complaining\" about thick provisioning...

\r\n

\r\nThanks in advance for any suggestion.

\r\n

\r\nStefano

\r\n

\r\n

\r\n

<\/a><\/p>","quoteUsername":"Stefano P.","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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2个答复

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曼弗雷德
开拓者
14个答复
4年前
2019年1月23日

由于Nutanix使用NFS作为协议，并支持VAAI函数。因此，您可以将厚厚的VM部署到NFS数据存储（没有VAAI）。

Nutanix ADSF保留了厚厚的VM的块；（根据您的VM部署要求）

但是出于效率和存储能力目的，最好瘦了。不仅适用于nutanix，而且对于纯纯：两个平台都支持厚的VM，而且都建议使用薄供应：

http://www.joshodgers.com/2017/07/27/its-2017-lets-review-thick-view-thick-vs-thin-provisioning/

https://support.purestorage.com/solutions/vmware_platform_guide/001vmwarebestpractices/pdf_guide%3a_vmware_vsphere_best_best_for_for_for_for_the_pure_pure_storage%C2; flasharray

\r\nNutanix ADSF reserves the blocks for thick provisioned VMs; (as you requested by your VM deployment)

\r\nbut for efficiency and storage capacity purposes it is better to go for thin; not only for Nutanix but also for Pure: both platforms support thick VMs but both recommend thin provisioning:

\r\n

\r\nhttp:\/\/www.joshodgers.com\/2017\/07\/27\/its-2017-lets-review-thick-vs-thin-provisioning\/

\r\n

\r\nhttps:\/\/support.purestorage.com\/Solutions\/VMware_Platform_Guide\/001VMwareBestPractices\/PDF_Guide%3A_VMware_vSphere_Best_Practices_for_the_Pure_Storage%C2%AE_FlashArray","quoteUsername":"manfred","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

UserLevel 2

曼弗雷德
开拓者
14个答复
4年前
2019年1月23日

关于数据弹性；

保留的块被视为使用的情况：因此不能将它们用作故障转移容量。如果您详细查看数据弹性（单击Prism Home屏幕中的数据弹性），您会查看是否可以松散磁盘。（故障域类型：磁盘）

\r\nreserved blocks are treated as if there are in use: so they cannot be used for example as failover capacity. if you take a look on the data resiliency in detail (click on data resiliency in prism home screen) you see if you can loose a disk or not.(FAULT DOMAIN TYPE: DISK)","quoteUsername":"manfred","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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