默认情况下，每个 Compute Engine 虚拟机 (VM) 实例都有一个包含操作系统的 Persistent Disk 启动卷。当您的应用需要额外的存储空间时，一种可能的解决方案是将其他 Persistent Disk 卷挂接到虚拟机。
Persistent Disk 卷是持久性网络存储设备，虚拟机可以像访问桌面设备或服务器中的物理磁盘一样访问它们。每个永久性磁盘上的数据分布在多个物理磁盘中。Compute Engine 为您管理物理磁盘和数据分布，以确保冗余和最佳性能。
Persistent Disk 卷的位置与虚拟机无关，因此即使在删除实例后，您也可以分离或移动卷以保留数据。Persistent Disk 性能会随大小自动调节，因此您可以调整现有 Persistent Disk 卷的大小或向虚拟机添加更多 Persistent Disk 卷，以满足您的性能和存储空间需求。
块存储资源具有不同的性能特征。请考虑您的存储大小和性能要求，以帮助您确定实例的正确块存储类型。Persistent Disk 性能是可预测的，可随预配容量线性调节，直到达到实例的预配 vCPU 限制。如需详细了解 Persistent Disk 性能限制，请参阅 Persistent Disk 的性能限制。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-03-05。"],[[["Persistent Disk volumes are network-based block storage devices accessible to virtual machine (VM) instances, offering benefits such as data durability, redundancy, and performance scaling with size."],["There are four main types of Persistent Disk: Balanced, Performance (SSD), Standard, and Extreme, each offering different performance and cost characteristics tailored to varying workloads, with the default being `pd-balanced` when created through the Google Cloud console."],["Persistent Disk volumes are highly reliable due to built-in redundancy, data distribution across multiple physical disks, and data encryption both in transit and at rest, using either system-defined or customer-supplied encryption keys."],["Regional Persistent Disk provides data replication across two zones within a region, offering higher availability and disaster recovery capabilities, suitable for systems requiring lower Recovery Point Objective (RPO) and Recovery Time Objective (RTO)."],["Persistent Disk supports features such as resizing, snapshots, multi-writer mode (for sharing between VMs), and logical volume management, simplifying disk management and enabling flexibility in meeting storage and performance needs."]]],[]]
