问题

在节点中混合HDD

  • 2021年3月24日
  • 4个答复
  • 345意见
我
徽章

我们有3个带有2x960GB SSD和4x4TB HDD的节点。

我们需要扩展存储（仅存储仅用于存储冷数据 - 我们不需要额外的处理能力或RAM）

问题1：我们只是向每个节点添加了两个12TB HDD。现在，每个节点具有2x960GB SSD，4x4TB HDD，2x12TB HDD。一切都很好，但是我们被告知不建议这样做。这种配置有什么问题

问题2：假设不建议使用Q1中的配置，我们最终希望每个节点具有一种类型的HDD。我们被告知我们可以使用12TB驱动器升级现有的4TB HDD。正确的程序是什么：

a）标记一个4TB驱动器进行拆卸，将其卸下，插入12TB驱动器代替删除的4TB驱动器。对节点重复4次。结果配置-6x12TB每个节点HDD

b）首先添加两个12TB驱动器，然后标记以拆卸并卸下四个4TB驱动器（一个一个驱动器）。结果配置-4x12TB HDD每个节点（我们首选配置）

谢谢你！

We have 3 nodes with 2x960GB SSD and 4x4TB HDD.<\/p>

We need to expand storage (and storage only as it is going to be used to store cold data - we do not need additional processing power or RAM)<\/p>

Question 1: We simply added two 12TB HDDs to each node. Now each node has 2x960GB SSD, 4x4TB HDDs, 2x12TB HDDs. Everything is working fine, but we were told that this is not recommended. What is the problem with this configuration<\/p>

Question 2: Assuming the configuration in Q1 is not recommended and we want to end up with each node having one type of HDDs. We were told that we can upgrade the existing 4TB HDDs with 12TB drives. What the right procedure would be:<\/p>

\u00a0 a) Mark one 4TB drive for removal, remove it, insert 12TB drive in place of removed 4TB drive. Repeat 4 times for a node. Resulting configuration - 6x12TB HDDs per node<\/p>

\u00a0 b) Add two more 12TB drives first, then mark for removal and remove four 4TB drives (one by one). Resulting configuration - 4x12TB HDDs per node (preferred configuration by us)<\/p>

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

4个答复

A
UserLevel 2
徽章 +2

你好，
根据我阅读的内容以及使用的内容，Nutanix推荐了整个集群中相同的磁盘。相信这背后的原因是复制的工作原理，但我不是100％确定的。例如：如果您在3个节点群集上每个节点有4x 12TB磁盘，则可以。因此，整个群集中每个节点的每个节点都有6x 12TB磁盘。当您混合和匹配驱动器尺寸时，问题就会出现。（其他聚类软件也建议使用该软件以及诸如ZFS之类的软件突袭程序。在ZFS中，如果您有8TB 8TB 8TB和10TB驱动器，该软件将将10TB驱动器分配为8TB驱动器。混合和匹配驱动器在计算时会变得有问题。将数据放置在哪里，并根据群集中的数据如何导致数据或数据丢失的损坏）。

tl; dr保持您的驱动器大小相同以避免头痛：喜悦：


这是我在Homelab中添加 /删除驱动器的方式：
1.添加12TB驱动器。

  1. 在“硬件”选项卡中初始化12TB驱动器。
  2. 等待数据迁移。
  3. 当驱动器似乎稳定时，请转到“硬件”选项卡并删除单个4TB驱动器。
  4. 等待1驱动器被删除并复制数据。
  5. 将驱动器标记为完全删除的驱动器后，关闭节点。→如果您有热交换，这是可选的，但我建议它用于Homelab使用。
  6. 卸下驱动器。
  7. 冲洗并重复每次驱动器。

希望这可以帮助，

大学生

Hello,\u00a0
from what I have read and what I use, Nutanix recommends the same disks across the entire cluster. The believe the reasoning behind this is how the replication works, but I am not 100% certain. For example: if you have 4x 12tb disks per node across a 3 node cluster, this is fine. So is having 6x 12tb disks per node across the entire cluster. The issues come\u00a0when you mix and match drive sizes. (other clustering software recommends this as well as software raiding programs such as ZFS. in ZFS if you have a 8tb 8tb 8tb and 10tb drive, the software will partition the 10tb drive as an 8tb drive. mixing and matching drive sizes becomes problematic when calculating where to put the data and can lead to corruption of data or data loss depending on how the data is in the cluster).\u00a0<\/p>

Tl;dr keep your drive sizes the same to avoid headaches\u00a0\":joy:\"<\/p>


here\u2019s how I add \/ remove drives in my homelab:\u00a0
1. add the 12tb drives.<\/p>

  1. initialize the 12tb drive in the hardware tab.<\/li>\t
  2. wait for the data to migrate over.<\/li>\t
  3. when the drive seems to stablize, go to the hardware tab and remove a SINGLE 4tb drive.<\/li>\t
  4. wait as the \u200b\u200b\u200b\u200b\u200b1 drive is being removed and data is being replicated.\u00a0<\/li>\t
  5. once the drive is marked as completely remove, power off the node. \u2192\u00a0this is optional if you have Hot swap\u00a0available, but i\u2019d recommend it for homelab use.\u00a0<\/li>\t
  6. remove the drive.\u00a0<\/li>\t
  7. rinse and repeat per drive.\u00a0<\/li><\/ol>

    Hope this helps,<\/p>

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

我
徽章

这很棒。我希望情况如此。

不幸的是，Nutanix工程师坚持认为，我们需要先删除驱动器，然后用新驱动器替换为新驱动器，这意味着在驱动驱动器后，Nutanix期望将其替换为（常规的突袭），这是没有多大意义的。

谢谢您的确认。

成功按照您的说明成功报告

This is great. I hoped for this to be the case.<\/p>

Unfortunately Nutanix engineer insisted that we need to remove a drive first and then replace it with the new one, which would imply that after loosing a drive Nutanix expects it to be replaced (as a regular RAID) which would not make much sense.<\/p>

Thank you for confirming.<\/p>

Will report back after successfully following your instructions<\/p>","quoteUsername":"IgorBinder","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

阿卢西亚尼
UserLevel 7
徽章 +34

事情进展如何 @igorbinder？

在Twitter上关注我：https：//twitter.com/angeloluciani
How did things go @IgorBinder<\/user-mention> ?<\/p>","quoteUsername":"aluciani","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
我
徽章

周六在节点中添加了12TB驱动器。他们只是在用数据完成填充……计划是在周四晚上标记一个4TB驱动器以拆除。在一周内不能冒险这样做。成功删除后将报告

Added 12TB drives to the nodes on Saturday. They are just finishing populating with the data\u2026\u00a0The plan is to mark one 4TB drive for removal on Thursday night. Cannot risk doing it during the week. Will report back once it is successfully removed<\/p>","quoteUsername":"IgorBinder","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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