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pgbackrest/README.md
David Steele 9d949b7ad6 v0.11: Minor fixes 
Tweaking a few settings after running backups for about a month.

* Removed master_stderr_discard option on database SSH connections.  There have been occasional lockups and they could be related issues originally seen in the file code.

* Changed lock file conflicts on backup and expire commands to ERROR.  They were set to DEBUG due to a copy-and-paste from the archive locks.
2014-03-26 10:53:49 -04:00

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pg_backrest

Simple Postgres Backup and Restore

release notes

v0.11: Minor fixes

Tweaking a few settings after running backups for about a month.

  • Removed master_stderr_discard option on database SSH connections. There have been occasional lockups and they could be related issues originally seen in the file code.

  • Changed lock file conflicts on backup and expire commands to ERROR. They were set to DEBUG due to a copy-and-paste from the archive locks.

v0.10: Backup and archiving are functional

This version has been put into production at Resonate, so it does work, but there are a number of major caveats.

  • No restore functionality, but the backup directories are consistent Postgres data directories. You'll need to either uncompress the files or turn off compression in the backup. Uncompressed backups on a ZFS (or similar) filesystem are a good option because backups can be restored locally via a snapshot to create logical backups or do spot data recovery.

  • Archiving is single-threaded. This has not posed an issue on our multi-terabyte databases with heavy write volume. Recommend a large WAL volume or to use the async option with a large volume nearby.

  • Backups are multi-threaded, but the Net::OpenSSH library does not appear to be 100% threadsafe so it will very occasionally lock up on a thread. There is an overall process timeout that resolves this issue by killing the process. Yes, very ugly.

  • Checksums are lost on any resumed backup. Only the final backup will record checksum on multiple resumes. Checksums from previous backups are correctly recorded and a full backup will reset everything.

  • The backup.manifest is being written as Storable because Config::IniFile does not seem to handle large files well. Would definitely like to save these as human-readable text.

  • Absolutely no documentation (outside the code). Well, excepting these release notes.

  • Lots of other little things and not so little things. Much refactoring to follow.