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As a demonstration of the sort of thing that can be done by adding a custom backup target, this defines a 'shell' target which executes a command defined by the system administrator. The command is executed once for each tar archive generate by the backup and once for the backup manifest, if any. Each time the command is executed, it receives the contents of th file for which it is executed via standard input. The configured command can use %f to refer to the name of the archive (e.g. base.tar, $TABLESPACE_OID.tar, backup_manifest) and %d to refer to the target detail (pg_basebackup --target shell:DETAIL). A target detail is required if %d appears in the configured command and forbidden if it does not. Patch by me, reviewed by Abhijit Menon-Sen. Discussion: http://postgr.es/m/CA+TgmoaqvdT-u3nt+_kkZ7bgDAyqDB0i-+XOMmr5JN2Rd37hxw@mail.gmail.com
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.