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更换容量不同的HDD/SSD硬盘

  • 2016年5月15
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徽章 +5
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你好,

我想问一下Nutanix是否支持更换不同容量的SSD/HDD。

我问这个问题的原因是,我想在数据增长而不增加计算容量时保持一定的Hot Data比率。

我担心的是,如果我只添加NX-6035C就可以增加我的数据,但SSD可能不足以维持所需的Hot data的比例。

谢谢。
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最佳答案乔恩2016年5月16日19:00

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\n1 - SSD Tier size concerns when adding cold nodes
\nRarely does the size of an applications working set just \"go up\" arbitrarily, and even when it does, it usually translates into additional CPU and memory being needed to address more and more resources.
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\nWe haven't seen many if any issues when adding cold nodes strictly for the sake of capacity, as that is their purpose, simply adding more cold storage.
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\nIf you're application is growing, you'd very likely need to buy more \"regular\" nodes anyways, which would increase the size of all resources.
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\nThat said, there could be some corner cases in which you do have physical GB capacity going up, and working set size (hot data) going up, and not need anymore compute.
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\nTo this end, a future release is going to let you add ANY node as a \"cold\" node, such that you could have an \"all flash\" storage only node, to JUST increase the size of the SSD tier.
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\n2 - Replace Drive in a node with a different capacity
\nWhile we dont advertise it, we have done this plenty of times as the situation arises. Ideally, we get the sizing correct upfront, so this isn't needed, but we've done this \"tactically\" with customers. This isn't something I'd plan on having to do on a regular basis if I were you.","className":"post__content__best_answer"}">
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Userlevel 6
徽章 + 29
这里有几个要点


1 - SSD添加冷节点时需要考虑分级大小问题
应用程序工作集的大小很少会任意地“增加”,即使是这样,也通常需要额外的CPU和内存来处理越来越多的资源。

在严格地为了容量而添加冷节点时,我们没有看到很多问题,因为这是它们的目的,只是添加更多的冷存储。

如果您的应用程序正在增长,您很可能需要购买更多的“常规”节点,这将增加所有资源的大小。


也就是说,在某些特殊情况下,物理GB容量会增加,工作集大小(热数据)也会增加,不需要再进行计算。

为此,未来的版本将允许您将任何节点添加为“冷”节点,这样您就可以拥有一个“所有闪存”存储节点,以增加SSD层的大小。

2 -更换不同容量的节点中的Drive
虽然我们没有做广告,但随着情况的出现,我们已经做过很多次了。理想情况下,我们会提前获得正确的尺寸,所以这是不必要的,但我们已经“战术”地与客户做了这一点。如果我是你,我可不打算经常做这种事。
徽章 +1
嗨,乔恩,

如果我们已经有了Nutanix容器的数据,需要更换不同尺寸的硬盘,你有什么建议?

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