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WAL-G

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description WAL-G Overview

WAL-G provides open source database backup and restoration tools, with PostgreSQL among its supported systems. For PostgreSQL, it combines database backups with archiving of write-ahead logs, the records used to replay database changes. Keeping these files in remote storage supports recovery to a chosen point in time, rather than only to the moment of the last full backup. Its command-line approach makes it a practical component in scripted database maintenance.

Database administrators and infrastructure teams can use it when they need control over backup storage and recovery procedures for critical business data. Its defining role is archival and restoration, so recovery depends on a usable backup and the required logs. It suits organizations willing to configure and test their own protection process.

help WAL-G FAQ

What is WAL-G primarily used for in database management?

WAL-G is an open-source tool primarily used to perform continuous, incremental backups of PostgreSQL databases by archiving Write-Ahead Logs (WAL). It securely pushes these logs and full database snapshots to remote cloud storage systems like Amazon S3.

Is WAL-G a good alternative to Barman or pgBackRest?

Many DevOps teams consider WAL-G an excellent alternative to Barman or pgBackRest because it is written in Go and is incredibly lightweight. While it might lack some of the granular dashboarding of pgBackRest, its simplicity in pushing directly to AWS S3 is highly valued.

Can WAL-G be used to backup MySQL databases?

Yes, although it was originally forked from WAL-E and built explicitly for PostgreSQL, WAL-G has expanded its support to include MySQL and Microsoft SQL Server. It handles the binary logs of MySQL similarly to how it handles PostgreSQL's WAL files.

How does WAL-G help in disaster recovery?

By continuously uploading Write-Ahead Logs to S3, WAL-G allows database administrators to perform Point-in-Time Recovery (PITR) to restore the database to the exact second before a catastrophic failure occurred. This drastically reduces your Recovery Point Objective (RPO) to nearly zero.

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