组合两个高级托管磁盘或一个单独的磁盘可以很好地匹配容量
Combining two premium managed disks or one separate Disk is good to match capacity
我遇到这个问题很久了，在购买 Azure 托管磁盘时，我需要分配 512GB 高级磁盘。我想知道如果我分配两个 P15 (256GB) 高级磁盘也会提供与 P20 相同的容量，但价格略有不同，IOPS 和吞吐量。我需要回答以下问题：
- 512GB配单配哪种方式最好
(P20)512GB 或两个 256GB (P15) 磁盘？
- 如果我分配两个 256GB (P15) 磁盘，IOPS 和吞吐量会翻倍吗？
从 managed disk price 来看，两块 256GiB (P15) 的价格高于一块 P20 512GiB 高级磁盘。还有，两块P15盘比P20盘2300IOPS少了1100*2，但是吞吐量翻倍。
Take into account considerations listed below when making the choice.
Scale Limits (IOPS and Throughput) The IOPS and Throughput limits of
each Premium disk size is different and independent from the VM scale
limits. Make sure that the total IOPS and Throughput from the disks
are within scale limits of the chosen VM size.
For example, if an application requirement is a maximum of 250 MB/sec
Throughput and you are using a DS4 VM with a single P30 disk. The DS4
VM can give up to 256 MB/sec Throughput. However, a single P30 disk
has Throughput limit of 200 MB/sec. Consequently, the application will
be constrained at 200 MB/sec due to the disk limit. To overcome this
limit, provision more than one data disks to the VM or resize your
disks to P40 or P50.
所以如果你有一个大规模的虚拟机，你的应用程序需要更大的吞吐量，它支持同时向两个磁盘写入或操作数据以优化两个磁盘的吞吐量。可以select两块P15盘，不然的话，一般情况下用单块P20比两块P15好。
更多信息，您可以查看Azure premium storage: design for high performance。
我遇到这个问题很久了，在购买 Azure 托管磁盘时，我需要分配 512GB 高级磁盘。我想知道如果我分配两个 P15 (256GB) 高级磁盘也会提供与 P20 相同的容量，但价格略有不同，IOPS 和吞吐量。我需要回答以下问题：
- 512GB配单配哪种方式最好 (P20)512GB 或两个 256GB (P15) 磁盘？
- 如果我分配两个 256GB (P15) 磁盘，IOPS 和吞吐量会翻倍吗？
从 managed disk price 来看，两块 256GiB (P15) 的价格高于一块 P20 512GiB 高级磁盘。还有，两块P15盘比P20盘2300IOPS少了1100*2，但是吞吐量翻倍。
Take into account considerations listed below when making the choice.
Scale Limits (IOPS and Throughput) The IOPS and Throughput limits of each Premium disk size is different and independent from the VM scale limits. Make sure that the total IOPS and Throughput from the disks are within scale limits of the chosen VM size.
For example, if an application requirement is a maximum of 250 MB/sec Throughput and you are using a DS4 VM with a single P30 disk. The DS4 VM can give up to 256 MB/sec Throughput. However, a single P30 disk has Throughput limit of 200 MB/sec. Consequently, the application will be constrained at 200 MB/sec due to the disk limit. To overcome this limit, provision more than one data disks to the VM or resize your disks to P40 or P50.
所以如果你有一个大规模的虚拟机，你的应用程序需要更大的吞吐量，它支持同时向两个磁盘写入或操作数据以优化两个磁盘的吞吐量。可以select两块P15盘，不然的话，一般情况下用单块P20比两块P15好。
更多信息，您可以查看Azure premium storage: design for high performance。