Overview

Baidu Cloud Compute (BCC) utilizes Cloud Disk Service (CDS) as its system disk and data disk. You can also back up disk data by creating snapshots.

What is Cloud Disk Service

Cloud Disk Service (CDS) offers secure, reliable, and highly elastic storage, serving as a scalable block storage solution for Baidu Cloud Compute. It ensures high availability and supports large-capacity data storage.

Cloud Disk Service (CDS) supports random data read/write operations, and has excellent performance in throughput, IOPS, and abnormal recovery time, meeting the usage requirements of most customers across various scenarios. Cloud Disk Service (CDS) features a lifecycle independent of Baidu Cloud Compute and supports online resizing, online CDS type conversion, disaster recovery backup via automatic snapshots, disk rollback, and numerous other elastic management capabilities. Compared to local disks, Cloud Disk Service (CDS) employs triple-replica technology for CDS data storage. If partial storage nodes, storage media or network switches encounter unexpected failures, data will be immediately migrated to other nodes without affecting data access or any awareness of the failure.

CDS type

Cloud Disk Service (CDS) offers four disk types: enhanced SSD, general purpose SSD, high-performance cloud disk, and general-purpose HDD, each with different usage scenarios and prices. Please select the appropriate CDS type according to your needs. For more information about CTS types, please refer to Introduction to Cloud CDS Product.

CDS performance

Cloud Disk Service (CDS) offers four disk types: enhanced SSD, general purpose SSD, high-performance cloud disk, and general-purpose HDD, each with different performances, primarily reflected in single-disk IOPS, single-disk throughput, latency, purchase capacity, etc. For more information about CTS performance, please refer to Introduction to CDS Performance.

CDS operations

Cloud Disk Service (CDS) currently offers extensive product features in billing management, basic disk capabilities and elasticity, such as CDS server-side encryption, online resizing, online disk type changes and performance bursts. For more information about CTS function, please refer to Introduction to CDS Function.

Introduction to snapshot

A snapshot is a data state file of a Cloud Disk Service (CDS) at a specific time node. You can save the data of the Cloud Disk Service (CDS) at a specific time by creating a snapshot of the CDS at that moment. Through snapshot, you can realize disk data backup, disk data recovery and disk image creation. For more information on snapshot usage, creation principles and snapshot quota, please refer to Snapshot Usage Instructions.

Introduction to CDS snapshot operation

You can create automatic snapshots or manual snapshots for each Cloud Disk Service (CDS) and periodically delete outdated snapshots. You can also create new Cloud Disk Service (CDS) based on snapshots and replicate snapshots across regions to achieve cross-regional backup of data. For more information on CDS snapshot usage, please refer to Introduction to CDS Snapshot Operation.

Introduction to instance snapshot operation

You can create instance snapshots, i.e., full-machine snapshots, for all CDSs of the same BCC instance simultaneously to achieve full-machine data backup. For more information on instance snapshot usage, please refer to Introduction to Instance Snapshot Operation.