Allow pg_basebackup to stream transaction log in tar mode

Enterprise / PostgreSQL - Magnus Hagander [hagander.net] - 23 October 2016 08:23 UTC

This will write the received transaction log into a file called pg_wal.tar(.gz) next to the other tarfiles instead of writing it to base.tar. When using fetch mode, the transaction log is still written to base.tar like before, and when used against a pre-10 server, the file is named pg_xlog.tar.

To do this, implement a new concept of a "walmethod", which is responsible for writing the WAL. Two implementations exist, one that writes to a plain directory (which is also used by pg_receivexlog) and one that writes to a tar file with optional compression.

Reviewed by Michael Paquier

56c7d8d Allow pg_basebackup to stream transaction log in tar mode
doc/src/sgml/ref/pg_basebackup.sgml | 18 +-
src/bin/pg_basebackup/Makefile | 2 +-
src/bin/pg_basebackup/pg_basebackup.c | 62 +-
src/bin/pg_basebackup/pg_receivexlog.c | 10 +-
src/bin/pg_basebackup/receivelog.c | 316 ++++-----
src/bin/pg_basebackup/receivelog.h | 3 +-
src/bin/pg_basebackup/t/010_pg_basebackup.pl | 6 +-
src/bin/pg_basebackup/walmethods.c | 886 ++++++++++++++++++++++++++
src/bin/pg_basebackup/walmethods.h | 45 ++
src/include/pgtar.h | 1 +
src/port/tar.c | 2 +-
11 files changed, 1107 insertions(+), 244 deletions(-)

Upstream: git.postgresql.org

  • Share