但是我是一个问题,如果我有一个带有Thre节点的块(基本要开始),请使用RF2配置,我理解我可以松开1个节点,我的所有系统仍然可以启动和运行。
如果我在同一节点内的磁盘松开,也让我继续运行没有问题,但如果我在不同节点上的同时松开两个磁盘,是什么堆堆?
我明白,在这种情况下,我松开了两个丢失的磁盘上的数据,所以在这种情况下,所有MI进一步都会下降?
可能我错过了一些东西......
最好的答案j
\n\nNutanix does not use RAID to protect data, we store data in a \"Replication Factor\", which stores individual blocks of data in a redundant fashion across two or more nodes in a cluster (i.e RF2 two copies or RF3, three copies).
\n
\n
\nIf you have a drive fail, let's say it was a 1TB drive but only 200GB full.
\n
\nFor the sake of easy math, let's maintain a three node cluster.
\n
\nThat means (roughly) 200GB of information was on that disk, and approximately 200GB of information is spread across on all of the disks in the other two nodes, roughly 100GB per node
\n
\nIn a traditional storage system, you'd have to:
\nRebuild an entire 4TB Drive map, on to a hot spare (idle drive) within the system, regardless of data
\nRebuild that data parity from the \"RAID Pack\" the drive failed from, which trashes performance of that RAID pack and other workloads on it, and takes forever to do the operation.
\n
\nIn Nutanix, No Raid, so you only have to rebuild\/reprotect 200GB worth of information, instead of 1TB. Also, that 200GB is spread out across the entire cluster, so all disks and nodes participate in the rebuild, spreading out the rebuild task, and making it very low impact on the cluster and performance (if at all).
\n
\n
\nThe end result?
\nDrives fail, and rebuilds happen very quickly, as the rebuild eats into the free capacity of the cluster. This means no idle\/wasted hot spares.
\nThis means that the data is re-protected faster, so the likely hood of that second drive failure taking out data is minimized (not zero, but minimized).
\n
\n
\nIf you are concerned with dual disk failure, which some customers are for business critical operations, you'd want to go with an RF3 setup, which is basically N+2, so you can have any two components fail without worry.
\n
\n
\nAnyhow, you can read more about cluster resiliency in the nutanix bible:
\nhttp:\/\/nutanixbible.com\/<\/a>","className":"post__content__best_answer"}">