磁盘快不快，直接影响建站、数据库、读写密集应用。看两个维度。
两种读写
- 顺序读写：大文件连续读写，看 MB/s（下载、备份）。
- 随机读写（更关键）：小文件 / 数据库，看 IOPS 和 4K 速度。日常体验、数据库性能主要由它决定。
NVMe > SSD > HDD
NVMe 的随机性能比普通 SATA SSD 高一个数量级，HDD 更是天差地别。建站、数据库优先选 NVMe。
怎么测
fio测 4K 随机读写（最能反映真实体验）。dd测顺序写（粗略）。- 融合怪等一键脚本会顺便测（见 怎么测新机）。
提醒
标”NVMe”不等于独享——共享盘照样会被 超售 和限速，IO 高峰掉速。
挑机器趁退款期多测几次；想看在售机型去 库存监控。
Disk speed directly affects website performance, databases, and any read/write-intensive workload. There are two dimensions to look at.
Two Types of Read/Write
- Sequential read/write: Continuous reading and writing of large files; measured in MB/s (relevant for downloads, backups).
- Random read/write (more important): Small files and databases; measured in IOPS and 4K speed. This is what determines real-world responsiveness and database performance.
NVMe > SSD > HDD
NVMe’s random I/O performance is an order of magnitude higher than standard SATA SSD, and HDD doesn’t come close to either. For websites and databases, NVMe is the priority.
How to Test
fiofor 4K random read/write tests (best reflection of real-world experience).ddfor rough sequential write tests.- All-in-one benchmark scripts will include disk tests as part of their run (see how to benchmark a new VPS).
A Note
“NVMe” labeling doesn’t mean dedicated storage — shared NVMe drives can still suffer from overselling and throttling, with speed drops during I/O peaks.
Test thoroughly during the refund window; browse available plans at the stock monitor.
发表回复