mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-19 07:23:23 +02:00
5aa2350426
When implementing a replication solution ontop of logical decoding, two
related problems exist:
* How to safely keep track of replication progress
* How to change replication behavior, based on the origin of a row;
e.g. to avoid loops in bi-directional replication setups
The solution to these problems, as implemented here, consist out of
three parts:
1) 'replication origins', which identify nodes in a replication setup.
2) 'replication progress tracking', which remembers, for each
replication origin, how far replay has progressed in a efficient and
crash safe manner.
3) The ability to filter out changes performed on the behest of a
replication origin during logical decoding; this allows complex
replication topologies. E.g. by filtering all replayed changes out.
Most of this could also be implemented in "userspace", e.g. by inserting
additional rows contain origin information, but that ends up being much
less efficient and more complicated. We don't want to require various
replication solutions to reimplement logic for this independently. The
infrastructure is intended to be generic enough to be reusable.
This infrastructure also replaces the 'nodeid' infrastructure of commit
timestamps. It is intended to provide all the former capabilities,
except that there's only 2^16 different origins; but now they integrate
with logical decoding. Additionally more functionality is accessible via
SQL. Since the commit timestamp infrastructure has also been introduced
in 9.5 (commit 73c986add) changing the API is not a problem.
For now the number of origins for which the replication progress can be
tracked simultaneously is determined by the max_replication_slots
GUC. That GUC is not a perfect match to configure this, but there
doesn't seem to be sufficient reason to introduce a separate new one.
Bumps both catversion and wal page magic.
Author: Andres Freund, with contributions from Petr Jelinek and Craig Ringer
Reviewed-By: Heikki Linnakangas, Petr Jelinek, Robert Haas, Steve Singer
Discussion: 20150216002155.GI15326@awork2.anarazel.de,
20140923182422.GA15776@alap3.anarazel.de,
20131114172632.GE7522@alap2.anarazel.de
73 lines
2.4 KiB
Makefile
73 lines
2.4 KiB
Makefile
# contrib/test_decoding/Makefile
|
|
|
|
MODULES = test_decoding
|
|
PGFILEDESC = "test_decoding - example of a logical decoding output plugin"
|
|
|
|
# Note: because we don't tell the Makefile there are any regression tests,
|
|
# we have to clean those result files explicitly
|
|
EXTRA_CLEAN = $(pg_regress_clean_files) ./regression_output ./isolation_output
|
|
|
|
ifdef USE_PGXS
|
|
PG_CONFIG = pg_config
|
|
PGXS := $(shell $(PG_CONFIG) --pgxs)
|
|
include $(PGXS)
|
|
else
|
|
subdir = contrib/test_decoding
|
|
top_builddir = ../..
|
|
include $(top_builddir)/src/Makefile.global
|
|
include $(top_srcdir)/contrib/contrib-global.mk
|
|
endif
|
|
|
|
# Disabled because these tests require "wal_level=logical", which
|
|
# typical installcheck users do not have (e.g. buildfarm clients).
|
|
installcheck:;
|
|
|
|
# But it can nonetheless be very helpful to run tests on preexisting
|
|
# installation, allow to do so, but only if requested explicitly.
|
|
installcheck-force: regresscheck-install-force isolationcheck-install-force
|
|
|
|
check: regresscheck isolationcheck
|
|
|
|
submake-regress:
|
|
$(MAKE) -C $(top_builddir)/src/test/regress all
|
|
|
|
submake-isolation:
|
|
$(MAKE) -C $(top_builddir)/src/test/isolation all
|
|
|
|
submake-test_decoding:
|
|
$(MAKE) -C $(top_builddir)/contrib/test_decoding
|
|
|
|
REGRESSCHECKS=ddl rewrite toast permissions decoding_in_xact decoding_into_rel \
|
|
binary prepared replorigin
|
|
|
|
regresscheck: all | submake-regress submake-test_decoding temp-install
|
|
$(MKDIR_P) regression_output
|
|
$(pg_regress_check) \
|
|
--temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
|
|
--temp-instance=./tmp_check \
|
|
--outputdir=./regression_output \
|
|
$(REGRESSCHECKS)
|
|
|
|
regresscheck-install-force: | submake-regress submake-test_decoding temp-install
|
|
$(pg_regress_installcheck) \
|
|
$(REGRESSCHECKS)
|
|
|
|
ISOLATIONCHECKS=mxact delayed_startup ondisk_startup concurrent_ddl_dml
|
|
|
|
isolationcheck: all | submake-isolation submake-test_decoding temp-install
|
|
$(MKDIR_P) isolation_output
|
|
$(pg_isolation_regress_check) \
|
|
--temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
|
|
--outputdir=./isolation_output \
|
|
$(ISOLATIONCHECKS)
|
|
|
|
isolationcheck-install-force: all | submake-isolation submake-test_decoding temp-install
|
|
$(pg_isolation_regress_installcheck) \
|
|
$(ISOLATIONCHECKS)
|
|
|
|
PHONY: submake-test_decoding submake-regress check \
|
|
regresscheck regresscheck-install-force \
|
|
isolationcheck isolationcheck-install-force
|
|
|
|
temp-install: EXTRA_INSTALL=contrib/test_decoding
|