Protect your data with Alibaba Cloud storage and database disaster recovery features, including redundant storage, cross-region replication, scheduled backup, and geo-disaster recovery.
Storage
Redundant storage
Alibaba Cloud OSS offers two storage redundancy types. Locally redundant storage replicates data across multiple devices and facilities within a single zone to protect against hardware failures. Zone-redundant storage distributes data across multiple zones in the same region, maintaining availability even if one zone goes down.
Cross-region replication
The cross-region replication feature provided by OSS automatically and asynchronously replicates objects across regions, covering creation, updates, and deletions for cross-region disaster recovery.For users who require high data security and availability requirements, backup data from another region can be activated after a major disaster. Elastic Block Storage (EBS) also supports asynchronous replication across regions or zones for critical business data.
Versioning
Versioning stores previous versions of objects at the bucket level. If objects are accidentally overwritten or deleted, you can restore them to any earlier version.
Scheduled backup
Schedule periodic OSS backups to Cloud Backup and restore objects when needed. File Storage NAS integrates with Cloud Backup. For General-purpose NAS backups, Cloud Backup uses an efficient file system scan instead of snapshots. Configure backup policies with multiple replicas for fast restoration after data loss.
Consistency verification for replicated data
Elastic Block Storage provides the replication pair-consistent group feature for unified management of asynchronous replication in disaster recovery scenarios. Data on multiple disks in the same group can be restored to a consistent point in time for instance-level or multi-instance disaster recovery.
Databases
Data disaster recovery
Alibaba Cloud databases provide backup and recovery with automatic backup enabled by default. You can restore instances from backup sets within the same region or perform geo-disaster recovery to other regions. Standalone disaster recovery products are also available for fine-grained policy management.
Disk redundancy
Alibaba Cloud disk-based databases ensure data reliability through multiple-replica redundancy. High-availability versions add primary-secondary node redundancy.
Zone-disaster recovery
Alibaba Cloud database products, except single-node basic edition test instances, support primary-secondary high availability. Real-time data synchronization, anomaly detection, and automatic switchovers ensure zone-disaster recovery. Multi-zone deployment further enhances protection.
Geo-disaster recovery and global active-active
Geo-disaster recovery relies on real-time data transmission over Alibaba Cloud's low-latency internal network. Data Transmission Service (DTS) enables cross-region synchronization for RDS, PolarDB, Redis, MongoDB, and PolarDB-X, with two-way sync and multi-write designs for cost-effective disaster recovery. Data migration products support DB2, Teradata, and HBase. PolarDB's Global Database Network (GDN) provides native geo-disaster recovery through multi-cluster synchronization across regions of a country.
GDN synchronizes data across all member clusters in different regions, enabling seamless geo-disaster recovery failover.
Flashback query
PolarDB's flashback query enables point-in-time recovery from anomalies such as accidental data deletion, significantly improving fault recovery efficiency.