631535ae4f
* Fixed an issue where specifying --no-archive-check would throw a configuration error. Reported by Jason O'Donnell. * Fixed an issue where a temp WAL file left over after a well-timed system crash could cause the next archive-push to fail. * Fixed an issue where document generation failed because some OSs are not tolerant of having multiple installed versions of PostgreSQL. A separate VM is now created for each version. Also added a sleep after database starts during document generation to ensure the database is running before the next command runs. Reported by John Harvey. * The retention-archive option can now be be safely set to less than backup retention (retention-full or retention-diff) without also specifying archive-copy=n. The WAL required to make the backups that fall outside of archive retention consistent will be preserved in the archive. However, in this case PITR will not be possible for the backups that fall outside of archive retention. * When backing up and restoring tablespaces pgBackRest only operates on the subdirectory created for the version of PostgreSQL being run against. Since multiple versions can live in a tablespace (especially during a binary upgrade) this prevents too many files from being copied during a backup and other versions possibly being wiped out during a restore. This only applies to PostgreSQL >= 9.0 -- prior versions of PostgreSQL could not share a tablespace directory. * Generate an error when archive-check=y but archivecommand does not execute pgbackrest. Contributed by Jason O'Donnell. * Improved error message when repo-path or repo-remote-path does not exist. * Added checks for --delta and --force restore options to ensure that the destination is a valid $PGDATA directory. pgBackRest will check for the presence of PGVERSION or backup.manifest (left over from an aborted restore). If neither file is found then --delta and --force will be disabled but the restore will proceed unless there are files in the $PGDATA directory (or any tablespace directories) in which case the operation will be aborted. * When restore --set=latest (the default) the actual backup restored will be output to the log. * Support for PostgreSQL 9.5 partial WAL segments and recoverytargetaction setting. The archivemode = 'always' setting is not yet supported. * Support for recoverytarget = 'immediate' recovery setting introduced in PostgreSQL 9.4. * The following tablespace checks have been added: paths or files in pgtblspc, relative links in pgtblspc, tablespaces in $PGDATA. All three will generate errors.
3.9 KiB
pgBackRest
Reliable PostgreSQL Backup & Restore
Introduction
pgBackRest aims to be a simple, reliable backup and restore system that can seamlessly scale up to the largest databases and workloads.
Primary pgBackRest features:
- Local or remote backup
- Multi-threaded backup/restore for performance
- Checksums
- Safe backups (checks that logs required for consistency are present before backup completes)
- Full, differential, and incremental backups
- Backup rotation (and minimum retention rules with optional separate retention for archive)
- In-stream compression/decompression
- Archiving and retrieval of logs for replicas/restores built in
- Async archiving for very busy systems (including space limits)
- Backup directories are consistent PostgreSQL clusters (when hardlinks are on and compression is off)
- Tablespace support
- Restore delta option
- Restore using timestamp/size or checksum
- Restore remapping base/tablespaces
- Support for PostgreSQL >= 8.3
Instead of relying on traditional backup tools like tar and rsync, pgBackRest implements all backup features internally and uses a custom protocol for communicating with remote systems. Removing reliance on tar and rsync allows for better solutions to database-specific backup issues. The custom remote protocol limits the types of connections that are required to perform a backup which increases security.
Getting Started
pgBackRest strives to be easy to configure and operate:
- User guide for Ubuntu 12.04 & 14.04 / PostgreSQL 9.4.
- Command reference for command-line operations.
- Configuration reference for creating rich pgBackRest configurations.
Contributing
Contributions to pgBackRest are always welcome!
Code fixes or new features can be submitted via pull requests. Ideas for new features and improvements to existing functionality or documentation can be submitted as issues.
Bug reports should be submitted as issues. Please provide as much information as possible to aid in determining the cause of the problem.
You will always receive credit in the change log for your contributions.
Support
pgBackRest is completely free and open source under the MIT license. You may use it for personal or commercial purposes without any restrictions whatsoever. Bug reports are taken very seriously and will be addressed as quickly as possible.
Creating a robust disaster recovery policy with proper replication and backup strategies can be a very complex and daunting task. You may find that you need help during the architecture phase and ongoing support to ensure that your enterprise continues running smoothly.
Crunchy Data provides packaged versions of pgBackRest for major operating systems and expert full life-cycle commercial support for pgBackRest and all things PostgreSQL. Crunchy Data is committed to providing open source solutions with no vendor lock-in so cross-compatibility with the community version of pgBackRest is always strictly maintained.
Please visit Crunchy Backup Manager for more information.
Recognition
Primary recognition goes to Stephen Frost for all his valuable advice and criticism during the development of pgBackRest.
Crunchy Data has contributed significant time and resources to pgBackRest and continues to actively support development. Resonate also contributed to the development of pgBackRest and allowed early (but well tested) versions to be installed as their primary PostgreSQL backup solution.