pgbackrest/pgbackrest
Pgbackrest
pgBackRest 是一个用于 PostgreSQL 的分布式备份与恢复工具。它是一个增量备份引擎和时间点恢复管理器，支持在本地和远程存储库中创建全量、差异和增量备份。
该系统的特点是支持块级增量备份，仅保存修改过的数据，从而减少存储空间和传输时间。它通过 HTTP 与兼容 S3 的对象存储集成，并利用并行处理来最大化备份和恢复操作的吞吐量。
该工具涵盖了全面的灾难恢复能力，包括用于时间点恢复的预写日志 (WAL) 归档，以及用于检测数据损坏的基于校验和的完整性验证。它还通过策略驱动的轮换实现备份生命周期自动化，并通过存储库加密和安全传输协议保障数据安全。
Features
- PostgreSQL Backup Strategies - Implements automated procedures for creating full, differential, and incremental backups specifically for PostgreSQL databases.
- Disaster Recovery Systems - Provides comprehensive disaster recovery by restoring large PostgreSQL clusters using parallel processing and delta restores.
- S3-Compatible Cloud Storage - Integrates with S3-compatible object storage using HTTP for remote data redundancy.
- Database Backup and Restore - Provides a distributed system for creating and restoring database backups across local and remote repositories.
- Cloud Storage Connectors - Provides connectors to upload database backups and logs to cloud object storage via HTTP.
- Write-Ahead Logging - Streams transaction logs (WAL) to secure repositories to enable point-in-time recovery.
- Database Incremental Backups - Provides block-level incremental backups to reduce storage and transfer time for PostgreSQL databases.
- Multi-Level Backups - Creates full, differential, and incremental backups at the file or block level to minimize storage requirements.
- Point-in-Time Recovery - Provides mechanisms to restore database states to specific historical moments by replaying archived write-ahead logs.
- WAL Streaming - Streams write-ahead logs to a repository to enable database restoration to a specific timestamp.
- WAL and Snapshot Archiving - Ships PostgreSQL backups and transaction logs to remote object storage for offsite redundancy.
- Backup Retention Policies - Automates the expiration and rotation of old backup sets based on user-defined retention rules.
- Delta Database Restorations - Recovers data using delta restores to skip unchanged files and remap tablespaces for faster recovery.
- Parallel Restore Utilities - Leverages concurrency to perform parallel database restorations, minimizing downtime for large workloads.
- Parallel Processing - Uses parallel processing with multiple concurrent worker processes to maximize throughput during backup and restore operations.
- High-Performance Data Transfer - Optimizes large-volume data movement by adjusting compression levels, buffer sizes, and parallel process counts.
- Remote Backup Repository Management - Transfers backups and archives to local or remote locations via secure protocols to ensure data redundancy.
- Backup Integrity Verifications - Implements checksum-based verification for every file to detect data corruption during backup and restoration.
- Encrypted Backups - Encrypts stored backups at rest to protect sensitive database information from unauthorized access.
- Transport Security - Enforces modern encryption standards and custom cipher suites for secure communication with remote storage providers.
- Backup Performance Optimizations - Reduces the time and CPU cost of backup and restore operations using parallel processing and streaming compression.
- Object Storage Backups - Supports shipping PostgreSQL backups and transaction logs to S3-compatible object storage via HTTP.
- Backup Lifecycle Automation - Automates the transition and expiration of old backup archives to reclaim storage based on policy.
- Delta Restorations - Accelerates recovery speed by comparing checksums and only restoring files that differ from the local version.
- Archive Integrity Verifications - Calculates and validates cryptographic checksums for all backed-up files to detect data corruption.
- Backup and Recovery - Reliable backup and restore solution for PostgreSQL.
